{"id":3828,"date":"2026-02-27T23:25:39","date_gmt":"2026-02-28T02:25:39","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=3828"},"modified":"2026-04-12T15:42:00","modified_gmt":"2026-04-12T18:42:00","slug":"steal-zerado-mpstat-impacto-hypervisor-vps","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/steal-zerado-mpstat-impacto-hypervisor-vps\/","title":{"rendered":"Steal Zerado no Mpstat: Como Avaliar o Impacto do Hypervisor"},"content":{"rendered":"<div id=\"helps-504030026\" 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<p>Ver um <strong>steal zerado no mpstat<\/strong> (0.00) \u00e9 uma excelente not\u00edcia inicial para qualquer administrador de sistemas. O &#8220;steal time&#8221; mostra a porcentagem de tempo que a sua VPS tentou usar o processador, mas precisou esperar porque o hypervisor estava ocupado com outras m\u00e1quinas virtuais.<\/p>\n\n\n\n<p>Quando voc\u00ea roda o comando no terminal e se depara com um <strong>steal zerado no mpstat<\/strong>, isso indica que, naquele exato momento, o hypervisor n\u00e3o est\u00e1 limitando o desempenho da sua CPU. Toda vez que sua VPS pede processamento, ela recebe instantaneamente.<\/p>\n\n\n\n<p>No entanto, comemorar apenas olhando esse n\u00famero isolado \u00e9 um erro comum. Para avaliar o real impacto do hypervisor na sua VPS, voc\u00ea precisa ir al\u00e9m da CPU.<\/p>\n\n\n\n<p>Veja os pontos principais onde os gargalos podem estar escondidos:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A armadilha da VPS sem carga:<\/strong> Se a sua m\u00e1quina virtual estiver ociosa (sem receber tr\u00e1fego), o resultado ser\u00e1 um <strong>steal zerado no mpstat<\/strong> de qualquer forma. Para avaliar o hypervisor corretamente, monitore essa m\u00e9trica durante os hor\u00e1rios de pico do seu site ou aplique um teste de stress na CPU.<\/li>\n\n\n\n<li><strong>Gargalos de Disco (I\/O):<\/strong> O hypervisor pode entregar CPU perfeitamente, mas o disco f\u00edsico (SSD\/NVMe) pode estar sobrecarregado. Fique de olho na coluna <code>%iowait<\/code>. Se ela estiver alta, a CPU est\u00e1 ociosa esperando o disco responder.<\/li>\n\n\n\n<li><strong>Rede estrangulada:<\/strong> A placa de rede \u00e9 compartilhada no servidor f\u00edsico. Se outros clientes estiverem consumindo toda a banda, sua aplica\u00e7\u00e3o ficar\u00e1 lenta, independentemente do processamento livre.<\/li>\n\n\n\n<li><strong>Roubo de Mem\u00f3ria (Ballooning):<\/strong> Alguns provedores pegam a mem\u00f3ria RAM que sua VPS n\u00e3o est\u00e1 usando no momento e emprestam para outras inst\u00e2ncias, o que pode for\u00e7ar o uso de Swap quando sua aplica\u00e7\u00e3o precisar da RAM de volta.<\/li>\n<\/ul>\n\n\n\n<p>Em resumo, ter um <strong>steal zerado no mpstat<\/strong> \u00e9 um \u00f3timo ponto de partida, mas a verdadeira qualidade da sua hospedagem s\u00f3 se comprova estressando a m\u00e1quina e monitorando tamb\u00e9m a resposta do disco e da rede.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-mao-na-massa-como-testar-os-limites-da-sua-vps-na-pratica\">M\u00e3o na massa: Como testar os limites da sua VPS na pr\u00e1tica<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Como testar a CPU e monitorar o Steal Time<\/h3>\n\n\n\n<p>Para descobrir se o seu <strong>steal zerado no mpstat<\/strong> se mant\u00e9m quando a m\u00e1quina \u00e9 realmente exigida, vamos usar uma ferramenta chamada <code>sysbench<\/code> para estressar a CPU, enquanto monitoramos o <code>mpstat<\/code> em outra janela.<\/p>\n\n\n\n<p><strong>Passo 1:<\/strong> Instale as ferramentas necess\u00e1rias (exemplo para Ubuntu\/Debian):<\/p>\n\n\n\n<p>Bash<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>sudo apt update\nsudo apt install sysbench sysstat -y\n<\/pre><\/div>\n\n\n\n<p><strong>Passo 2:<\/strong> Abra dois terminais (duas janelas do SSH). No primeiro terminal, deixe o <code>mpstat<\/code> rodando para atualizar a cada 1 segundo:<\/p>\n\n\n\n<p>Bash<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>mpstat 1\n<\/pre><\/div>\n\n\n\n<p><strong>Passo 3:<\/strong> No segundo terminal, inicie o teste de stress na CPU usando todos os n\u00facleos dispon\u00edveis:<\/p>\n\n\n\n<p>Bash<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>sysbench cpu --threads=$(nproc) run\n<\/pre><\/div>\n\n\n\n<p><em>O que observar:<\/em> Volte rapidamente para o primeiro terminal. Se o <code>%steal<\/code> sair de zero e come\u00e7ar a subir (ex: 5%, 10%, 20%), significa que o hypervisor do seu provedor est\u00e1 limitando o seu processamento sob carga.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. Como testar o I\/O de Disco e monitorar o iowait<\/h3>\n\n\n\n<p>Como vimos, o hypervisor pode entregar CPU, mas o disco pode ser o gargalo. Vamos fazer um teste r\u00e1pido de grava\u00e7\u00e3o no disco ignorando o cache do sistema (<code>oflag=direct<\/code>).<\/p>\n\n\n\n<p><strong>Passo 1:<\/strong> No primeiro terminal, inicie o monitoramento de disco com o comando <code>iostat<\/code> (atualizando a cada 1 segundo):<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>iostat -xz 1\n<\/pre><\/div>\n\n\n\n<p><em>(Nota: se o iostat n\u00e3o estiver dispon\u00edvel, voc\u00ea pode continuar usando o <code>mpstat 1<\/code> e focar apenas na coluna <code>%iowait<\/code>)<\/em>.<\/p>\n\n\n\n<p><strong>Passo 2:<\/strong> No segundo terminal, rode um teste de escrita pesada criando um arquivo de 1GB:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>dd if=\/dev\/zero of=teste_disco bs=1G count=1 oflag=direct\n<\/pre><\/div>\n\n\n\n<p><strong>Passo 3:<\/strong> Limpe o arquivo de teste logo em seguida para n\u00e3o ocupar espa\u00e7o no servidor:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>rm teste_disco\n<\/pre><\/div>\n\n\n\n<p><em>O que observar:<\/em> Enquanto o comando <code>dd<\/code> estiver rodando, olhe para o seu monitoramento. Se a coluna <code>%iowait<\/code> disparar para n\u00fameros muito altos, significa que sua CPU est\u00e1 ociosa apenas esperando o disco (que est\u00e1 lento) conseguir gravar os dados.<\/p>\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-1772245568826\"><strong class=\"schema-faq-question\">O que significa %steal no <a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-crowdsec\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Como instalar Crowdsec\" target=\"_blank\" rel=\"noopener\">Linux<\/a>?<\/strong> <p class=\"schema-faq-answer\">O <code>%steal<\/code> (ou steal time) \u00e9 a porcentagem de tempo que a sua m\u00e1quina virtual tentou utilizar o processador, mas precisou aguardar porque o hypervisor f\u00edsico estava ocupado processando tarefas de outras m\u00e1quinas virtuais (vizinhos barulhentos).<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1772245590977\"><strong class=\"schema-faq-question\">Um steal zerado indica que o servidor \u00e9 excelente?<\/strong> <p class=\"schema-faq-answer\">N\u00e3o necessariamente. Um steal zerado apenas indica que a CPU n\u00e3o est\u00e1 sofrendo conten\u00e7\u00e3o no momento da medi\u00e7\u00e3o. O servidor ainda pode apresentar gargalos de leitura de disco (I\/O), lentid\u00e3o na rede ou at\u00e9 mesmo limita\u00e7\u00e3o de mem\u00f3ria imposta pelo hypervisor.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1772245614201\"><strong class=\"schema-faq-question\">Como testar o limite do hypervisor na VPS?<\/strong> <p class=\"schema-faq-answer\">Para descobrir se o hypervisor limita sua m\u00e1quina, \u00e9 necess\u00e1rio rodar ferramentas de stress de CPU, como o <code>sysbench<\/code> ou o <code>stress<\/code>. Isso for\u00e7ar\u00e1 a m\u00e1quina virtual a pedir processamento m\u00e1ximo; se o hypervisor n\u00e3o der conta, o steal time subir\u00e1.<\/p> <\/div> <\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-veja-mais\">Veja Mais:<\/h3>\n\n\n\n<p><a href=\"https:\/\/helpsysadmin.com.br\/blog\/monitoramento-continuo-servidores-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Monitoramento Cont\u00ednuo de Servidores Linux: Guia Definitivo<\/strong><\/a><\/p>\n\n\n\n<p><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/zabbix-prometheus-ou-netdata-para-monitoramento\/\" target=\"_blank\" rel=\"noreferrer noopener\">Zabbix, Prometheus ou Netdata para monitoramento cont\u00ednuo<\/a><\/strong><\/p>\n\n\n\n<p><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/monitoramento-uptime-externo-guia\/\" target=\"_blank\" rel=\"noreferrer noopener\">Monitoramento de Uptime: Por que o monitoramento externo \u00e9 essencial (e como configurar)<\/a><\/strong><\/p>\n\n\n\n<p><strong><a href=\"https:\/\/helpsysadmin.com.br\/blog\/icinga-vs-checkmk-configuracao-alertas\/\" target=\"_blank\" rel=\"noreferrer noopener\">Icinga vs Checkmk: Guia Pr\u00e1tico de Configura\u00e7\u00e3o e Alertas<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ver um steal zerado no mpstat (0.00) \u00e9 uma excelente not\u00edcia inicial para qualquer administrador de sistemas. O &#8220;steal time&#8221; mostra a [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3829,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4187],"tags":[3231,13,3757,82,3759,2322,209],"class_list":["post-3828","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-monitoramento-e-troubleshooting","tag-hypervisor","tag-linux","tag-mpstat","tag-performance","tag-steal-time","tag-troubleshooting","tag-vps"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Steal Zerado no Mpstat: Como Avaliar o Impacto do Hypervisor<\/title>\n<meta name=\"description\" content=\"Viu o steal zerado no mpstat e quer entender o que significa? 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