{"id":7332,"date":"2026-09-15T21:08:10","date_gmt":"2026-09-16T00:08:10","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=7332"},"modified":"2026-09-15T21:49:36","modified_gmt":"2026-09-16T00:49:36","slug":"swap-ideal-para-vps-cloud-dedicado","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/swap-ideal-para-vps-cloud-dedicado\/","title":{"rendered":"Swap Ideal para VPS, Cloud e Dedicado: Guia de Configura\u00e7\u00e3o"},"content":{"rendered":"\n<h2 id=\"h-o-que-e-swap-e-por-que-e-importante\" class=\"wp-block-heading\">O que \u00e9 Swap e Por Que \u00e9 Importante?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A mem\u00f3ria Swap atua como uma extens\u00e3o da mem\u00f3ria RAM f\u00edsica do seu servidor. Quando a RAM principal se esgota, o sistema operacional move os dados inativos para uma parti\u00e7\u00e3o ou arquivo no disco r\u00edgido (o Swap). Isso evita que o sistema trave ou encerre processos abruptamente atrav\u00e9s do <em>OOM Killer<\/em> (Out of Memory). Encontrar o <strong>Swap ideal para VPS<\/strong>, cloud ou servidor dedicado garante que suas aplica\u00e7\u00f5es continuem operando de forma est\u00e1vel, mesmo durante picos imprevistos de tr\u00e1fego.<\/p>\n\n\n\n<h3 id=\"h-configurando-o-swap-ideal-para-vps-e-cloud\" class=\"wp-block-heading\">Configurando o Swap Ideal para VPS e Cloud<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Em ambientes virtualizados, a configura\u00e7\u00e3o exige um equil\u00edbrio cuidadoso. O uso excessivo de pagina\u00e7\u00e3o em discos SSD ou NVMe pode reduzir a vida \u00fatil do armazenamento devido ao alto volume de reescrita, enquanto a aus\u00eancia de Swap deixa o sistema vulner\u00e1vel a falhas.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>At\u00e9 2GB de RAM:<\/strong> Configure o dobro de Swap (ex: se tem 1GB de RAM, use 2GB de Swap).<\/li>\n\n\n\n<li><strong>De 2GB a 8GB de RAM:<\/strong> O tamanho do Swap deve ser exatamente igual ao tamanho da mem\u00f3ria RAM f\u00edsica.<\/li>\n\n\n\n<li><strong>Mais de 8GB de RAM:<\/strong> Utilize pelo menos 4GB de Swap. A partir desse volume, a depend\u00eancia do disco diminui, e o Swap atua apenas como uma rede de seguran\u00e7a.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-swap-em-servidores-dedicados\" class=\"wp-block-heading\">Swap em Servidores Dedicados<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Para servidores dedicados que lidam com bancos de dados massivos ou virtualiza\u00e7\u00e3o pesada, a regra muda ligeiramente. O objetivo principal em um ambiente de alta capacidade \u00e9 evitar ao m\u00e1ximo que o sistema dependa do Swap, pois a leitura em disco \u00e9 sempre mais lenta que a RAM. A recomenda\u00e7\u00e3o geral \u00e9 manter entre 4GB e 8GB de Swap est\u00e1tico como margem de emerg\u00eancia, independentemente se a m\u00e1quina possui 64GB ou 256GB de RAM.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Criar Swap no Linux: passo a passo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A forma mais simples e recomendada atualmente \u00e9 criar um <strong>arquivo de Swap (swapfile)<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Verificar se j\u00e1 existe Swap<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Antes de criar qualquer coisa, execute:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapon --show<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">ou:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Exemplo:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"> <code>              total        used        free      shared  buff\/cache   available\nMem:            7.7Gi       2.1Gi       1.8Gi       200Mi       3.8Gi       5.2Gi\nSwap:             0B          0B          0B<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Se aparecer <code>Swap: 0B<\/code>, o servidor n\u00e3o possui Swap ativa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tamb\u00e9m podemos verificar:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>cat \/proc\/swaps<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. Verificar espa\u00e7o dispon\u00edvel no disco<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Antes de criar o Swapfile:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df -h \/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Exemplo:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Filesystem      Size  Used Avail Use% Mounted on\n\/dev\/nvme0n1p1  100G   45G   55G  45% \/<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Certifique-se de que existe espa\u00e7o suficiente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para VPS com pouca RAM, alguns tamanhos comuns s\u00e3o:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>RAM do servidor<\/th><th>Swap sugerida<\/th><\/tr><\/thead><tbody><tr><td>1 GB<\/td><td>1\u20132 GB<\/td><\/tr><tr><td>2 GB<\/td><td>2 GB<\/td><\/tr><tr><td>4 GB<\/td><td>2\u20134 GB<\/td><\/tr><tr><td>8 GB<\/td><td>2\u20134 GB<\/td><\/tr><tr><td>16 GB<\/td><td>2\u20134 GB<\/td><\/tr><tr><td>32 GB+<\/td><td>2\u20138 GB<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Importante:<\/strong> n\u00e3o existe uma regra universal de &#8220;Swap = X vezes a RAM&#8221;. Em servidores modernos, o tamanho deve considerar a carga de trabalho, capacidade de RAM e necessidade de recupera\u00e7\u00e3o de picos.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Criar o arquivo de Swap<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Por exemplo, para criar <strong>4 GB de Swap<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>fallocate -l 4G \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Verifique:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ls -lh \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Deve aparecer algo semelhante a:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-rw-r--r-- 1 root root 4.0G \/swapfile<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Caso <code>fallocate<\/code> n\u00e3o esteja dispon\u00edvel<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Voc\u00ea pode utilizar:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dd if=\/dev\/zero of=\/swapfile bs=1M count=4096 status=progress<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Para 2 GB:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dd if=\/dev\/zero of=\/swapfile bs=1M count=2048 status=progress<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Para 8 GB:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dd if=\/dev\/zero of=\/swapfile bs=1M count=8192 status=progress<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Proteger o arquivo<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O Swapfile n\u00e3o deve ficar acess\u00edvel para outros usu\u00e1rios.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Execute:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>chmod 600 \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Verifique:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ls -lh \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Resultado esperado:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-rw------- 1 root root 4.0G \/swapfile<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. Formatar o arquivo como Swap<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Agora execute:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mkswap \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Voc\u00ea dever\u00e1 receber algo semelhante a:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Setting up swapspace version 1, size = 4 GiB\nno label, UUID=xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">6. Ativar a Swap<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Execute:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapon \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Agora confira:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapon --show<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Exemplo:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NAME      TYPE SIZE USED PRIO\n\/swapfile file   4G   0B   -2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">E:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Resultado:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"> <code>              total        used        free\nMem:            7.7Gi       2.1Gi       1.5Gi\nSwap:           4.0Gi          0B       4.0Gi<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Nesse ponto, a Swap j\u00e1 est\u00e1 funcionando.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">7. Tornar a Swap permanente<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Esse passo \u00e9 <strong>muito importante<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Se voc\u00ea reiniciar o servidor agora, a Swap pode deixar de ser ativada.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Edite:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/etc\/fstab<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Adicione no final:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/swapfile none swap sw 0 0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Salve o arquivo.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">8. Testar o <code>\/etc\/fstab<\/code><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e3o \u00e9 necess\u00e1rio reiniciar o servidor para testar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Primeiro desative:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapoff \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Depois:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapon -a<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Verifique:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapon --show<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Se aparecer:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NAME      TYPE SIZE USED PRIO\n\/swapfile file   4G   0B   -2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">est\u00e1 funcionando corretamente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tamb\u00e9m \u00e9 poss\u00edvel verificar:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">9. Configurar o Swappiness<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O par\u00e2metro <code>vm.swappiness<\/code> controla a tend\u00eancia do kernel de utilizar Swap.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Veja o valor atual:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl vm.swappiness<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Exemplo:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vm.swappiness = 60<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Para um servidor de produ\u00e7\u00e3o, frequentemente faz sentido come\u00e7ar com um valor mais baixo, como:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl -w vm.swappiness=10<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Verifique:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl vm.swappiness<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Resultado:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vm.swappiness = 10<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Tornar permanente<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Edite:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/etc\/sysctl.conf<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Adicione:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vm.swappiness=10<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Depois:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl -p<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Confirme:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl vm.swappiness<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">10. Configurar <code>vfs_cache_pressure<\/code><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Outro par\u00e2metro que pode ser ajustado em servidores <a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-crowdsec\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Como instalar Crowdsec\" target=\"_blank\" rel=\"noopener\">Linux<\/a> \u00e9:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vm.vfs_cache_pressure<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Verifique:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl vm.vfs_cache_pressure<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Uma configura\u00e7\u00e3o conservadora pode ser:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl -w vm.vfs_cache_pressure=50<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Para tornar permanente:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/etc\/sysctl.conf<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Adicione:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vm.vfs_cache_pressure=50<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Depois:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl -p<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">11. Configura\u00e7\u00e3o recomendada para VPS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Uma configura\u00e7\u00e3o inicial bastante simples seria:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/swapfile none swap sw 0 0\nvm.swappiness=10\nvm.vfs_cache_pressure=50<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Depois:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl -p<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Verifique:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h\nswapon --show\nsysctl vm.swappiness\nsysctl vm.vfs_cache_pressure<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">12. Como monitorar o uso da Swap<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e3o basta criar Swap. \u00c9 importante observar <strong>se o servidor realmente est\u00e1 utilizando Swap<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Use:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Ou:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapon --show<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Para acompanhar continuamente:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>watch -n 1 free -h<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Tamb\u00e9m podemos verificar a atividade de Swap com:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vmstat 1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Exemplo:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>procs -----------memory---------- ---swap-- -----io----\n r  b   swpd   free   buff  cache   si   so  bi  bo\n 1  0      0  1.5G   300M   3.2G    0    0   2   5\n 1  0      0  1.4G   300M   3.2G    0    0   0   2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Os campos importantes s\u00e3o:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>si<\/code> = mem\u00f3ria sendo trazida da Swap para RAM<\/li>\n\n\n\n<li><code>so<\/code> = mem\u00f3ria sendo enviada da RAM para Swap<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Se <code>si<\/code> e <code>so<\/code> estiverem constantemente altos, isso pode indicar <strong>press\u00e3o de mem\u00f3ria<\/strong>, e simplesmente aumentar a Swap n\u00e3o resolve a causa.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">13. Como saber se o servidor est\u00e1 sofrendo press\u00e3o de mem\u00f3ria<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Execute:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Depois:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vmstat 1<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">E:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dmesg | grep -i -E 'oom|out of memory|killed process'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Em sistemas com systemd:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>journalctl -k | grep -i -E 'oom|out of memory|killed process'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Se aparecer algo como:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Out of memory: Killed process 12345<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">o servidor teve um evento de <strong>OOM (Out Of Memory)<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nesse cen\u00e1rio, \u00e9 necess\u00e1rio investigar o consumo de RAM, em vez de simplesmente aumentar a Swap.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">14. Como remover a Swap<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Se precisar remover posteriormente:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Primeiro:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapoff \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Depois remova a entrada do:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>nano \/etc\/fstab<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Remova:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/swapfile none swap sw 0 0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Finalmente:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>rm -f \/swapfile<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Confirme:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>swapon --show<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">15. Comandos completos para criar 4 GB de Swap<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Se voc\u00ea j\u00e1 verificou que n\u00e3o existe Swap e quer simplesmente criar um <strong>Swapfile de 4 GB<\/strong>, a sequ\u00eancia \u00e9:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>fallocate -l 4G \/swapfile\nchmod 600 \/swapfile\nmkswap \/swapfile\nswapon \/swapfile\necho '\/swapfile none swap sw 0 0' &gt;&gt; \/etc\/fstab\nsysctl -w vm.swappiness=10\nsysctl -w vm.vfs_cache_pressure=50<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Depois:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>swapon --show<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl vm.swappiness<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u26a0\ufe0f Um ponto importante para VPS, Cloud e NVMe<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Swap n\u00e3o substitui RAM.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Em uma VPS com 8 GB de RAM, por exemplo, criar 4 GB de Swap n\u00e3o significa que o servidor passou a ter 12 GB de RAM com a mesma performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Swap fica no armazenamento e, quando utilizada intensamente, pode aumentar significativamente a lat\u00eancia de mem\u00f3ria e I\/O.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para servidores com <strong>WordPress, MariaDB, PHP-FPM, Nginx\/Apache ou DirectAdmin<\/strong>, o ideal \u00e9 usar Swap principalmente como <strong>mecanismo de prote\u00e7\u00e3o contra picos de mem\u00f3ria<\/strong>, enquanto o consumo normal permanece na RAM.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para um servidor de produ\u00e7\u00e3o, eu tamb\u00e9m recomendo verificar:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>free -h\nvmstat 1\niostat -xz 1\nps aux --sort=-%mem | head -20<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Isso permite diferenciar <strong>falta real de RAM<\/strong>, <strong>Swap excessiva<\/strong>, <strong>problema de I\/O<\/strong> e <strong>processos consumindo mem\u00f3ria demais<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 id=\"h-faq\" class=\"wp-block-heading\">FAQ<\/h3>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1789516781332\"><strong class=\"schema-faq-question\">O Swap deixa o meu servidor mais lento?<\/strong> <p class=\"schema-faq-answer\">Sim, mas apenas se o sistema estiver ativamente utilizando-o (fazendo <em>swapping<\/em> constante). O armazenamento em disco possui maior lat\u00eancia que a RAM.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1789516802635\"><strong class=\"schema-faq-question\">Posso rodar um servidor sem <a href=\"https:\/\/helpsysadmin.com.br\/blog\/configurar-login-automatico-phpmyadmin\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Como Configurar Login Autom\u00e1tico no phpMyAdmin via DirectAdmin\">configurar<\/a> Swap?<\/strong> <p class=\"schema-faq-answer\">\u00c9 poss\u00edvel, mas n\u00e3o \u00e9 recomendado. Sem essa \u00e1rea de troca de dados, um pico s\u00fabito de consumo de mem\u00f3ria resultar\u00e1 no encerramento imediato de servi\u00e7os cr\u00edticos, como o seu banco de dados ou servidor web.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1789516826827\"><strong class=\"schema-faq-question\">Como verifico a quantidade de Swap atual no Linux?<\/strong> <p class=\"schema-faq-answer\">Basta acessar o terminal via SSH e digitar o comando <code>free -h<\/code> ou <code>swapon --show<\/code><\/p> <\/div> <\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Saiba Mais:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/otimizar-vps-servidor-dedicado-cloud\/\" target=\"_blank\" rel=\"noopener\">Como Otimizar VPS, Servidor Dedicado ou Cloud: Guia Completo<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/vps-lenta-diagnostico-otimizacao\/\">VPS Lenta? Guia de Diagn\u00f3stico, Otimiza\u00e7\u00e3o e Escalonamento<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/cloud-vs-servidor-dedicado-sites-medios\/\">Cloud vale a pena para sites m\u00e9dios? O Guia Definitivo<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/overprovisioning-em-cloud-guia-otimizacao\/\">Overprovisioning em Cloud: O Guia Definitivo para SysAdmins (2026)<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/quando-migrar-servidor-dedicado-performance\/\">Quando migrar para servidor dedicado?<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/benchmark-vps-vs-servidor-dedicado-performance\/\">VPS vs Servidor Dedicado em 2026 (Guia T\u00e9cnico)<\/a><\/strong><br><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/guia-completo-comando-sar-linux\/\">Definitivo: Como Dominar o Comando Sar Linux para Monitoramento<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O que \u00e9 Swap e Por Que \u00e9 Importante? A mem\u00f3ria Swap atua como uma extens\u00e3o da mem\u00f3ria RAM f\u00edsica do seu [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":7333,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":2,"footnotes":""},"categories":[4189],"tags":[2860,13,3143,82,3849,2940,209],"class_list":["post-7332","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-performance-e-otimizacao","tag-cloud","tag-linux","tag-oom-killer-2","tag-performance","tag-servidor-dedicado-5","tag-swap","tag-vps"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.3 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Swap Ideal para VPS, Cloud e Dedicado: Guia de Configura\u00e7\u00e3o<\/title>\n<meta name=\"description\" content=\"Descubra qual \u00e9 o swap ideal para VPS, servidores dedicados e cloud. 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Apresentamos a melhor experi\u00eancia em atendimento e servi\u00e7o. Nosso time cuidar\u00e1 do seu servidor com backups, an\u00e1lises constantes, ajustes de seguran\u00e7a, realiza\u00e7\u00e3o de manuten\u00e7\u00e3o preventiva e corretiva, otimiza\u00e7\u00e3o de performance al\u00e9m de monitoramento 24\u00d77 com suporte Pr\u00f3 Ativo.\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"minValue\":\"1\",\"maxValue\":\"10\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/#\\\/schema\\\/person\\\/bdbe3d7d71a0c6a3cb474c18da574efb\",\"name\":\"HelpSysAdmin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/efc0007e6a313a844b72de257e05c6083b07b6ecc6983a4f71e06293ff2e22fd?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/efc0007e6a313a844b72de257e05c6083b07b6ecc6983a4f71e06293ff2e22fd?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/efc0007e6a313a844b72de257e05c6083b07b6ecc6983a4f71e06293ff2e22fd?s=96&d=mm&r=g\",\"caption\":\"HelpSysAdmin\"},\"sameAs\":[\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/\"]},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/swap-ideal-para-vps-cloud-dedicado\\\/#faq-question-1789516781332\",\"position\":1,\"url\":\"https:\\\/\\\/helpsysadmin.com.br\\\/blog\\\/swap-ideal-para-vps-cloud-dedicado\\\/#faq-question-1789516781332\",\"name\":\"O Swap deixa o meu servidor mais lento?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Sim, mas apenas se o sistema estiver ativamente utilizando-o (fazendo <em>swapping<\\\/em> constante). 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