{"id":5375,"date":"2026-04-07T11:18:35","date_gmt":"2026-04-07T14:18:35","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=5375"},"modified":"2026-04-22T00:40:51","modified_gmt":"2026-04-22T03:40:51","slug":"swap-alto-com-ram-livre-linux","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/swap-alto-com-ram-livre-linux\/","title":{"rendered":"Swap Alto com RAM Livre: Por Que Isso Acontece e como Resolver"},"content":{"rendered":"<div id=\"helps-1937823136\" class=\"helps-before-content-2 helps-entity-placement\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3661896953164277\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- 2anuncios display quadrado -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-3661896953164277\"\r\n     data-ad-slot=\"5051229894\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-introducao\">Introdu\u00e7\u00e3o<\/h2>\n\n\n\n<p>Se voc\u00ea administra servidores <a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-crowdsec\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Como instalar Crowdsec\" target=\"_blank\" rel=\"noopener\">Linux<\/a> \u2014 seja VPS, servidor dedicado ou cloud \u2014 provavelmente j\u00e1 se deparou com uma situa\u00e7\u00e3o que gera bastante d\u00favida:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Existe mem\u00f3ria RAM livre<\/li>\n\n\n\n<li>Mas o sistema continua utilizando swap<\/li>\n<\/ul>\n\n\n\n<p>Esse cen\u00e1rio \u00e9 conhecido como <strong>swap alto com ram livre<\/strong>, e pode parecer contradit\u00f3rio \u00e0 primeira vista.<\/p>\n\n\n\n<p>A rea\u00e7\u00e3o mais comum \u00e9 pensar:<\/p>\n\n\n\n<p>\ud83d\udc49 \u201cAlgo est\u00e1 errado com meu servidor\u201d<\/p>\n\n\n\n<p>Mas a realidade \u00e9 bem diferente.<\/p>\n\n\n\n<p>O Linux possui um sistema de gerenciamento de mem\u00f3ria extremamente avan\u00e7ado, projetado para <strong>maximizar performance<\/strong>, e n\u00e3o apenas para \u201cencher a RAM antes de usar swap\u201d.<\/p>\n\n\n\n<p>Neste guia completo, voc\u00ea vai entender profundamente:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O que significa swap alto com ram livre<\/li>\n\n\n\n<li>Por que isso acontece no Linux<\/li>\n\n\n\n<li>Quando \u00e9 normal e quando \u00e9 problema<\/li>\n\n\n\n<li>Como identificar gargalos reais<\/li>\n\n\n\n<li>Como otimizar seu servidor corretamente<\/li>\n<\/ul>\n\n\n\n<p>Se voc\u00ea trabalha com performance, DirectAdmin, cPanel, WordPress ou infraestrutura Linux, este conte\u00fado vai elevar seu n\u00edvel de diagn\u00f3stico.<\/p>\n\n\n\n<p>Se o seu servidor est\u00e1 utilizando swap mesmo com RAM livre, \u00e9 essencial analisar a performance do sistema como um todo. Para isso, veja o guia completo de <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/performance-de-servidores-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\">performance de servidores Linux<\/a><\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-funciona-a-memoria-no-linux\">Como funciona a mem\u00f3ria no Linux<\/h2>\n\n\n\n<p>Para entender o cen\u00e1rio de <strong>swap alto com ram livre<\/strong>, primeiro \u00e9 essencial compreender como o Linux gerencia mem\u00f3ria.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-o-papel-da-memoria-ram\">O papel da mem\u00f3ria RAM<\/h3>\n\n\n\n<p>A RAM \u00e9 utilizada para:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Processos ativos<\/li>\n\n\n\n<li>Execu\u00e7\u00e3o de aplica\u00e7\u00f5es<\/li>\n\n\n\n<li>Cache de arquivos<\/li>\n\n\n\n<li>Buffers do sistema<\/li>\n<\/ul>\n\n\n\n<p>Diferente do que muitos pensam, o Linux tenta <strong>usar o m\u00e1ximo poss\u00edvel da RAM<\/strong>, mas de forma inteligente.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-o-que-e-memoria-swap\">O que \u00e9 mem\u00f3ria swap<\/h3>\n\n\n\n<p>Swap \u00e9 uma \u00e1rea no disco usada como extens\u00e3o da mem\u00f3ria RAM.<\/p>\n\n\n\n<p>Ela serve para:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Evitar falta de mem\u00f3ria (OOM Killer)<\/li>\n\n\n\n<li>Manter estabilidade do sistema<\/li>\n\n\n\n<li>Armazenar dados menos utilizados<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-diferenca-de-performance\">Diferen\u00e7a de performance<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Tipo de mem\u00f3ria<\/th><th>Velocidade<\/th><\/tr><\/thead><tbody><tr><td>RAM<\/td><td>Extremamente r\u00e1pida<\/td><\/tr><tr><td>Swap (disco)<\/td><td>Muito mais lenta<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Por isso, o uso excessivo de swap pode impactar desempenho \u2014 mas isso depende do contexto.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-por-que-ocorre-swap-alto-com-ram-livre\">Por que ocorre swap alto com ram livre?<\/h2>\n\n\n\n<p>Agora chegamos ao ponto central.<\/p>\n\n\n\n<p>O cen\u00e1rio de <strong>swap alto com ram livre<\/strong> acontece porque o Linux <strong>n\u00e3o utiliza mem\u00f3ria de forma \u201clinear\u201d<\/strong>.<\/p>\n\n\n\n<p>Ele toma decis\u00f5es baseadas em efici\u00eancia.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-o-kernel-antecipa-uso-de-memoria\">1. O kernel antecipa uso de mem\u00f3ria<\/h3>\n\n\n\n<p>O Linux move para swap:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Processos inativos<\/li>\n\n\n\n<li>Dados pouco acessados<\/li>\n\n\n\n<li>P\u00e1ginas antigas de mem\u00f3ria<\/li>\n<\/ul>\n\n\n\n<p>Isso permite que a RAM fique dispon\u00edvel para:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aplica\u00e7\u00f5es cr\u00edticas<\/li>\n\n\n\n<li>Cache de disco<\/li>\n\n\n\n<li>Opera\u00e7\u00f5es intensivas<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-cache-e-mais-importante-que-ram-livre\">2. Cache \u00e9 mais importante que RAM livre<\/h3>\n\n\n\n<p>Um dos conceitos mais importantes:<\/p>\n\n\n\n<p>\ud83d\udc49 RAM livre n\u00e3o \u00e9 sin\u00f4nimo de desempenho<\/p>\n\n\n\n<p>O Linux prefere usar RAM para cache, pois isso:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Acelera leitura de arquivos<\/li>\n\n\n\n<li>Reduz acesso ao disco<\/li>\n\n\n\n<li>Melhora performance geral<\/li>\n<\/ul>\n\n\n\n<p>Nesse cen\u00e1rio, o uso de swap faz parte da estrat\u00e9gia.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-swappiness-influencia-diretamente\">3. Swappiness influencia diretamente<\/h3>\n\n\n\n<p>O par\u00e2metro <strong>swappiness<\/strong> define o comportamento do kernel.<\/p>\n\n\n\n<p>Valor padr\u00e3o:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">cat \/proc\/sys\/vm\/swappiness<\/pre>\n\n\n\n<p>Normalmente retorna:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">60<\/pre>\n\n\n\n<p>Isso significa:<\/p>\n\n\n\n<p>\ud83d\udc49 O sistema come\u00e7a a usar swap relativamente cedo<\/p>\n\n\n\n<p>Quanto maior o valor, mais agressivo ser\u00e1 o uso de swap.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-swap-nao-e-limpo-automaticamente\">4. Swap n\u00e3o \u00e9 limpo automaticamente<\/h3>\n\n\n\n<p>Outro ponto importante no cen\u00e1rio de <strong>swap alto com ram livre<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dados enviados para swap permanecem l\u00e1<\/li>\n\n\n\n<li>Mesmo que a RAM fique dispon\u00edvel depois<\/li>\n<\/ul>\n\n\n\n<p>Isso \u00e9 completamente normal no Linux.<\/p>\n\n\n\n<p>O uso de swap pode estar relacionado a diversos fatores. Veja a estrat\u00e9gia completa de <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/performance-de-servidores-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\">otimiza\u00e7\u00e3o de servidores Linux<\/a><\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-quando-swap-alto-com-ram-livre-e-normal\">Quando swap alto com ram livre \u00e9 normal?<\/h2>\n\n\n\n<p>Nem todo uso de swap \u00e9 problema.<\/p>\n\n\n\n<p>Na verdade, em muitos casos, \u00e9 esperado.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-cenario-saudavel\">\u2714\ufe0f Cen\u00e1rio saud\u00e1vel<\/h3>\n\n\n\n<p>Voc\u00ea pode considerar o comportamento normal quando:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O servidor est\u00e1 r\u00e1pido<\/li>\n\n\n\n<li>N\u00e3o h\u00e1 travamentos<\/li>\n\n\n\n<li>iowait est\u00e1 baixo<\/li>\n\n\n\n<li>Swap permanece est\u00e1vel<\/li>\n\n\n\n<li>N\u00e3o h\u00e1 crescimento constante<\/li>\n<\/ul>\n\n\n\n<p>Nesse contexto, <strong>swap alto com ram livre \u00e9 apenas otimiza\u00e7\u00e3o do sistema<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-exemplo-pratico\">\u2714\ufe0f Exemplo pr\u00e1tico<\/h3>\n\n\n\n<p>Servidor com:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>16GB RAM<\/li>\n\n\n\n<li>2GB swap em uso<\/li>\n\n\n\n<li>6GB RAM livre<\/li>\n<\/ul>\n\n\n\n<p>Isso pode indicar que:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O sistema moveu processos antigos para swap<\/li>\n\n\n\n<li>Est\u00e1 utilizando RAM para cache<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Totalmente saud\u00e1vel<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-quando-swap-alto-com-ram-livre-vira-problema\">Quando swap alto com ram livre vira problema?<\/h2>\n\n\n\n<p>Agora sim, o ponto cr\u00edtico.<\/p>\n\n\n\n<p>O cen\u00e1rio de <strong>swap alto com ram livre<\/strong> passa a ser problema quando h\u00e1 impacto real na performance.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-sinais-de-alerta\">\ud83d\udea8 Sinais de alerta<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lentid\u00e3o no sistema<\/li>\n\n\n\n<li>Alto uso de disco<\/li>\n\n\n\n<li>iowait elevado<\/li>\n\n\n\n<li>Swap crescendo constantemente<\/li>\n\n\n\n<li>Aplica\u00e7\u00f5es travando<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-principal-vilao-iowait\">\ud83d\udea8 Principal vil\u00e3o: IOWAIT<\/h3>\n\n\n\n<p>Swap utiliza disco.<\/p>\n\n\n\n<p>Se houver acesso constante ao swap:<\/p>\n\n\n\n<p>\ud83d\udc49 O disco vira gargalo<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-exemplo-problematico\">\ud83d\udea8 Exemplo problem\u00e1tico<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Swap aumentando continuamente<\/li>\n\n\n\n<li>RAM sendo liberada e consumida rapidamente<\/li>\n\n\n\n<li>Sistema lento mesmo com RAM dispon\u00edvel<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Isso indica m\u00e1 configura\u00e7\u00e3o ou falta de recursos<\/p>\n\n\n\n<p>Esse comportamento pode indicar problemas mais amplos no sistema. Para entender melhor, confira como melhorar a <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/performance-de-servidores-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\">performance de servidores Linux<\/a><\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-diagnosticar-corretamente\">Como diagnosticar corretamente<\/h2>\n\n\n\n<p>Para entender se o cen\u00e1rio de <strong>swap alto com ram livre<\/strong> \u00e9 saud\u00e1vel ou problem\u00e1tico, voc\u00ea precisa de dados.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-ver-uso-de-memoria\">\ud83d\udd39 1. Ver uso de mem\u00f3ria<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\"><\/pre>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>free -h<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D8DEE9\">free<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-<\/span><span style=\"color: #D8DEE9\">h<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Observe:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mem\u00f3ria dispon\u00edvel<\/li>\n\n\n\n<li>Uso de swap<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-monitorar-swap-em-tempo-real\">\ud83d\udd39 2. Monitorar swap em tempo real<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\"><\/pre>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>vmstat 1<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D8DEE9\">vmstat<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Campos importantes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>si (swap in)<\/li>\n\n\n\n<li>so (swap out)<\/li>\n<\/ul>\n\n\n\n<p>Se esses valores estiverem sempre ativos:<\/p>\n\n\n\n<p>\ud83d\udc49 Problema real<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-ver-uso-de-disco\">\ud83d\udd39 3. Ver uso de disco<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\"><\/pre>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>iostat -x 1<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D8DEE9\">iostat<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-<\/span><span style=\"color: #D8DEE9\">x<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Observe:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>%iowait<\/li>\n\n\n\n<li>utiliza\u00e7\u00e3o do disco<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-historico-com-sar\">\ud83d\udd39 4. Hist\u00f3rico com sar<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\"><\/pre>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>sar -W 1 5<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D8DEE9\">sar<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-<\/span><span style=\"color: #D8DEE9\">W<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">5<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Mostra atividade de swap ao longo do tempo.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-resolver-swap-alto-com-ram-livre\">Como resolver swap alto com ram livre<\/h2>\n\n\n\n<p>Agora vamos para a parte pr\u00e1tica.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-ajustar-swappiness\">\u2714\ufe0f 1. Ajustar swappiness<\/h3>\n\n\n\n<p>Reduzir o uso agressivo de swap:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><\/pre>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>sysctl vm.swappiness=10<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D8DEE9\">sysctl<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">vm<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">swappiness<\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #B48EAD\">10<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Persistente:<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>echo \"vm.swappiness=10\" >> \/etc\/sysctl.conf<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D8DEE9\">echo<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">vm.swappiness=10<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">&gt;&gt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">\/<\/span><span style=\"color: #D8DEE9\">etc<\/span><span style=\"color: #81A1C1\">\/<\/span><span style=\"color: #D8DEE9\">sysctl<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9\">conf<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<pre class=\"wp-block-preformatted\">Aplique as altera\u00e7\u00f5es: sysctl -p<\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-limpar-swap-manualmente\">\u2714\ufe0f 2. Limpar swap manualmente<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\"><\/pre>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>swapoff -a &amp;&amp; swapon -a<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D8DEE9\">swapoff<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-<\/span><span style=\"color: #D8DEE9\">a<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">&amp;&amp;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">swapon<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-<\/span><span style=\"color: #D8DEE9\">a<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u26a0\ufe0f <strong>Use apenas se houver RAM suficiente<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-otimizar-aplicacoes\">\u2714\ufe0f 3. Otimizar aplica\u00e7\u00f5es<\/h3>\n\n\n\n<p>Muito comum em servidores:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>WordPress<\/li>\n\n\n\n<li>DirectAdmin<\/li>\n\n\n\n<li>cPanel<\/li>\n\n\n\n<li>MariaDB<\/li>\n<\/ul>\n\n\n\n<p>Ajustes recomendados:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PHP-FPM (pm.max_children). Veja: <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/php-fpm-como-calcular-pm-max_children\/\" target=\"_blank\" rel=\"noreferrer noopener\">PHP-FPM: Como Calcular pm.max_children Corretamente<\/a><\/strong><\/li>\n\n\n\n<li>MariaDB (buffer pool). Veja: <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/tuning-mariadb-mysql-my-cnf-innodb\/\" target=\"_blank\" rel=\"noreferrer noopener\">Tuning MariaDB e MySQL: 5 Ajustes no my.cnf (Foco InnoDB)<\/a><\/strong><\/li>\n\n\n\n<li>Redu\u00e7\u00e3o de processos desnecess\u00e1rios<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-revisar-consumo-de-memoria\">\u2714\ufe0f 4. Revisar consumo de mem\u00f3ria<\/h3>\n\n\n\n<pre class=\"wp-block-preformatted\"><\/pre>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>ps aux --sort=-%mem | head<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #D8DEE9\">ps<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">aux<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">--<\/span><span style=\"color: #D8DEE9\">sort<\/span><span style=\"color: #81A1C1\">=-%<\/span><span style=\"color: #D8DEE9\">mem<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">|<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">head<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Identifique processos pesados.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-adicionar-mais-ram-se-necessario\">\u2714\ufe0f 5. Adicionar mais RAM (se necess\u00e1rio)<\/h3>\n\n\n\n<p>Se o swap cresce continuamente:<\/p>\n\n\n\n<p>\ud83d\udc49 Pode ser limita\u00e7\u00e3o real de mem\u00f3ria<\/p>\n\n\n\n<p>Resolver swap alto envolve ajustes no sistema como um todo. Veja como melhorar a <a href=\"https:\/\/helpsysadmin.com.br\/blog\/performance-de-servidores-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>performance do servidor Linux<\/strong>.<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-cenarios-reais-de-producao\">Cen\u00e1rios reais de produ\u00e7\u00e3o<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-vps-com-wordpress\">VPS com WordPress<\/h3>\n\n\n\n<p>Muito comum ver <strong>swap alto com ram livre<\/strong> em VPS com m\u00faltiplos sites.<\/p>\n\n\n\n<p>Motivos:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cache ativo<\/li>\n\n\n\n<li>Processos PHP antigos<\/li>\n\n\n\n<li>Baixo tuning<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-servidor-com-directadmin\">Servidor com DirectAdmin<\/h3>\n\n\n\n<p>Pain\u00e9is de controle geram:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Muitos processos simult\u00e2neos<\/li>\n\n\n\n<li>Uso vari\u00e1vel de mem\u00f3ria<\/li>\n<\/ul>\n\n\n\n<p>Swap ajuda a estabilizar o ambiente.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-banco-de-dados-mariadb\">Banco de dados (MariaDB)<\/h3>\n\n\n\n<p>Pode consumir grande parte da RAM.<\/p>\n\n\n\n<p>Resultado:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Processos secund\u00e1rios v\u00e3o para swap<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-cloud-e-picos-de-trafego\">Cloud e picos de tr\u00e1fego<\/h3>\n\n\n\n<p>Durante picos:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Swap pode aumentar temporariamente<\/li>\n\n\n\n<li>Depois volta ao normal<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udc49 Comportamento esperado<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-boas-praticas-avancadas\">Boas pr\u00e1ticas avan\u00e7adas<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-definir-swappiness-ideal\">\u2714\ufe0f Definir swappiness ideal<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Ambiente<\/th><th>Valor recomendado<\/th><\/tr><\/thead><tbody><tr><td>Desktop<\/td><td>60<\/td><\/tr><tr><td>Servidor comum<\/td><td>10\u201320<\/td><\/tr><tr><td>Alta performance<\/td><td>1\u201310<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-monitoramento-continuo\">\u2714\ufe0f Monitoramento cont\u00ednuo<\/h3>\n\n\n\n<p>Ferramentas essenciais:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>htop<\/li>\n\n\n\n<li>vmstat<\/li>\n\n\n\n<li>sar<\/li>\n\n\n\n<li>netdata<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-evitar-oom-killer\">\u2714\ufe0f Evitar OOM Killer<\/h3>\n\n\n\n<p>Sem swap:<\/p>\n\n\n\n<p>\ud83d\udc49 O sistema pode matar processos cr\u00edticos<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-equilibrio-e-a-chave\">\u2714\ufe0f Equil\u00edbrio \u00e9 a chave<\/h3>\n\n\n\n<p>Nem zero swap, nem swap excessivo.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-resumo-tecnico\">Resumo t\u00e9cnico<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Situa\u00e7\u00e3o<\/th><th>Interpreta\u00e7\u00e3o<\/th><\/tr><\/thead><tbody><tr><td>Swap alto com RAM livre<\/td><td>Normal na maioria dos casos<\/td><\/tr><tr><td>Swap crescendo sempre<\/td><td>Poss\u00edvel problema<\/td><\/tr><tr><td>Swap + iowait alto<\/td><td>Gargalo cr\u00edtico<\/td><\/tr><tr><td>Sistema r\u00e1pido<\/td><td>Tudo ok<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusao\">Conclus\u00e3o<\/h2>\n\n\n\n<p>O cen\u00e1rio de <strong>swap alto com ram livre<\/strong> \u00e9 um dos mais mal interpretados por administradores de servidores Linux.<\/p>\n\n\n\n<p>A grande verdade \u00e9:<\/p>\n\n\n\n<p>\ud83d\udc49 O Linux usa swap como estrat\u00e9gia de otimiza\u00e7\u00e3o, n\u00e3o apenas como \u00faltimo recurso.<\/p>\n\n\n\n<p>Na maioria dos casos, esse comportamento \u00e9:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Normal<\/li>\n\n\n\n<li>Esperado<\/li>\n\n\n\n<li>Ben\u00e9fico<\/li>\n<\/ul>\n\n\n\n<p>Por\u00e9m, torna-se um problema quando:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Afeta performance<\/li>\n\n\n\n<li>Sobrecarrega disco<\/li>\n\n\n\n<li>Indica falta de recursos<\/li>\n<\/ul>\n\n\n\n<p>O segredo est\u00e1 em:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Monitorar corretamente<\/li>\n\n\n\n<li>Interpretar os dados<\/li>\n\n\n\n<li>Ajustar conforme o ambiente<\/li>\n<\/ul>\n\n\n\n<p>Se voc\u00ea domina isso, j\u00e1 est\u00e1 \u00e0 frente de grande parte dos sysadmins.<\/p>\n\n\n\n<p>Para evitar problemas recorrentes, \u00e9 fundamental otimizar o ambiente completo. Consulte o guia de <strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/performance-de-servidores-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\">como otimizar servidores Linux<\/a><\/strong>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>O uso de swap deve ser analisado junto com outras m\u00e9tricas do sistema. Veja tamb\u00e9m:<\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/usar-vmstat-para-achar-gargalo-linux\/\">como usar vmstat<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/load-average-linux-como-interpretar\/\">como interpretar load average<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/guia-completo-comando-sar-linux\/\">como monitorar com sar<\/a><\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-faq\">FAQ<\/h3>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1775570159700\"><strong class=\"schema-faq-question\">O que significa swap alto com ram livre?<\/strong> <p class=\"schema-faq-answer\">Significa que o sistema est\u00e1 utilizando swap mesmo tendo mem\u00f3ria dispon\u00edvel, geralmente por otimiza\u00e7\u00e3o do kernel.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1775570223762\"><strong class=\"schema-faq-question\">Swap alto com ram livre \u00e9 ruim?<\/strong> <p class=\"schema-faq-answer\">Nem sempre. S\u00f3 \u00e9 problema quando h\u00e1 lentid\u00e3o ou alto uso de disco.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1775570243630\"><strong class=\"schema-faq-question\">Como reduzir swap no Linux?<\/strong> <p class=\"schema-faq-answer\">Ajustando o swappiness e otimizando o uso de mem\u00f3ria das aplica\u00e7\u00f5es.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1775570269500\"><strong class=\"schema-faq-question\">Posso desativar o swap?<\/strong> <p class=\"schema-faq-answer\">N\u00e3o \u00e9 recomendado em servidores, pois pode causar falhas em caso de falta de mem\u00f3ria.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1775570301304\"><strong class=\"schema-faq-question\">Qual o melhor swappiness?<\/strong> <p class=\"schema-faq-answer\">Entre 10 e 20 para servidores.<\/p> <\/div> <\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-veja-mais\">Veja Mais:<br><\/h3>\n\n\n\n<p><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/performance-de-servidores-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\">Performance de Servidores Linux: Guia Completo 2026<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/servidor-lento-identificar-gargalo-vps-dedicado-cloud\/\" target=\"_blank\" rel=\"noreferrer noopener\">Servidor Lento: Como Identificar o Gargalo<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/io-de-disco-servidor-linux\/\">I\/O de disco servidor Linux: Como Resolver Gargalos<br><\/a><a href=\"https:\/\/helpsysadmin.com.br\/blog\/cpu-100-linux-o-que-verificar\/\">CPU 100% no Linux: O Que Verificar Primeiro no Servidor<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/usar-vmstat-para-achar-gargalo-linux\/\">Como Usar vmstat para Achar Gargalo no Linux em Minutos<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/load-average-linux-como-interpretar\/\">Load Average no Linux: Como Interpretar Corretamente<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/achar-gargalo-com-iostat\/\">Como Achar Gargalo com Iostat: Guia Definitivo e Pr\u00e1tico<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/iowait-alto-causas-reais\/\">Iowait Alto: Causas Reais e Solu\u00e7\u00f5es<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/monitoramento-linux-vmstat-iostat-sar\/\">Guia Completo de Monitoramento Linux com vmstat, iostat e sar<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/tuning-sysctl-producao-linux\/\">Tuning de sysctl para Produ\u00e7\u00e3o: Guia Definitivo de Performance Linux<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/limits-conf-linux\/\">Como Ajustar limits.conf no Linux: Guia para Alta Performance<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/oom-killer-mysql-guia-sobrevivencia\/\">OOM Killer e MySQL: Como Evitar que o Linux Mate seu Banco de Dados<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/memory-leak-linux-detectar-resolver\/\">Memory Leak Linux: Como Detectar e Corrigir<\/a><\/strong><br><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-saiba-mais\">Saiba Mais:<\/h3>\n\n\n\n<p><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/no-space-left-on-device-com-espaco-livre\/\">No space left on device com espa\u00e7o livre? Como resolver (Guia Completo)<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/identificar-processo-consome-cpu-linux\/\">Como identificar processo que consome CPU no Linux (Guia Completo)<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/limitar-cpu-processo-linux-cgroups\/\">Como Limitar CPU por Processo no Linux com cgroups (Guia Completo)<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/upgrade-cpu-vs-otimizacao-servidor\/\">Upgrade de CPU ou Otimizar? Guia Completo<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/ram-cheia-no-linux-o-que-fazer\/\">RAM Cheia no Linux: O Guia Definitivo para Resolver Travamentos em 2026<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/buffers-e-cache-quando-sao-um-problema\/\">Buffers e Cache: Quando Deixam de Ajudar e Viram um Problema?<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/out-of-memory-causas-reais-solucoes\/\">Out of Memory (OOM): Causas Reais, Diagn\u00f3stico e Como Resolver<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-evitar-oom-killer-linux-producao\/\">Como evitar OOM Killer Linux em Produ\u00e7\u00e3o: Guia Definitivo 2026<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/gargalo-no-linux-cpu-vs-ram\/\">Gargalo no Linux: Como Identificar se o Problema \u00e9 CPU ou RAM?<\/a><\/strong><br><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-saiba-mais-0\">Saiba Mais:<\/h3>\n\n\n\n<p><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/disco-lento-no-linux-como-identificar\/\">Disco Lento no Linux: Guia Completo para Identificar e Resolver<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/latencia-de-disco-no-linux-alta\/\">Lat\u00eancia de Disco no Linux Alta: Causas, Diagn\u00f3stico e Solu\u00e7\u00f5es<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/limpar-cache-memoria-linux-guia-completo\/\">Como Limpar Cache de Mem\u00f3ria no Linux: O Guia Definitivo<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/testar-velocidade-disco-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\">Como Testar Velocidade de Disco no Linux (Guia Completo)<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/performance-armazenamento-nvme-raid\/\" target=\"_blank\" rel=\"noreferrer noopener\">Performance de Armazenamento NVMe vs RAID: O Guia Definitivo 2026<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/throughput-vs-iops-linux-performance\/\" target=\"_blank\" rel=\"noreferrer noopener\">Throughput vs IOPS no Linux: Guia Definitivo de Performance [2026]<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/reduzir-escrita-disco-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\">Reduzir Escrita em Disco Linux: Guia Completo para Melhorar Performance<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/logs-consumindo-disco-linux-guia-limpeza\/\" target=\"_blank\" rel=\"noreferrer noopener\">Logs Consumindo Disco? Como Controlar e Limpar o Linux (Guia 2026)<\/a><\/strong><br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introdu\u00e7\u00e3o Se voc\u00ea administra servidores Linux \u2014 seja VPS, servidor dedicado ou cloud \u2014 provavelmente j\u00e1 se deparou com uma situa\u00e7\u00e3o que [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":5376,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4187],"tags":[4135,2912,4127,4137,4129,4131,4125,2820,2310,4133],"class_list":["post-5375","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-monitoramento-e-troubleshooting","tag-gargalo-servidor","tag-iowait","tag-memoria-ram-linux","tag-memoria-virtual","tag-otimizacao-de-servidor-17","tag-performance-linux-12","tag-swap-linux-4","tag-swappiness","tag-sysadmin","tag-tuning-linux-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Swap Alto com RAM Livre: Por Que Isso Acontece e como Resolver<\/title>\n<meta name=\"description\" content=\"Swap alto com RAM livre \u00e9 problema? 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