{"id":2949,"date":"2026-02-04T00:02:51","date_gmt":"2026-02-04T03:02:51","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=2949"},"modified":"2026-02-15T18:30:44","modified_gmt":"2026-02-15T21:30:44","slug":"logs-abuso-recursos-servidor","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/logs-abuso-recursos-servidor\/","title":{"rendered":"Logs que indicam abuso de recursos no servidor Linux"},"content":{"rendered":"<div id=\"helps-326195399\" 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>Logs abuso de recursos. <strong>logs s\u00e3o praticamente \u201cconfiss\u00e3o espont\u00e2nea\u201d de abuso de recursos<\/strong> quando voc\u00ea sabe onde olhar \ud83d\udc40<br>Vou organizar por <strong>tipo de recurso<\/strong> e <strong>logs reais que entregam o problema<\/strong>, focando em <a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-crowdsec\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Como instalar Crowdsec\" target=\"_blank\" rel=\"noopener\">Linux<\/a> \/ Dedicado \/ servidores web.<\/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-cpu-processos-fora-de-controle\">\ud83e\udde0 CPU (processos fora de controle)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-syslog-messages\">\ud83d\udcc4 <code>syslog<\/code> \/ <code>messages<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>kernel: CPU soft lockup - CPU#2 stuck for 22s! [php-fpm:24531]\nkernel: watchdog: BUG: soft lockup\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd34 <strong>Indica<\/strong>: processo travando o scheduler (loop infinito, script PHP mal escrito, cron bugado).<\/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-php-fpm-log\">\ud83d\udcc4 <code>php-fpm.log<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>[WARNING] [pool www] child 12345 exited on signal 9 (SIGKILL)\n[NOTICE] child 12345 started\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd34 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Consumo excessivo de CPU\/mem\u00f3ria<\/li>\n\n\n\n<li>OOM Killer agindo ou <code>pm.max_children<\/code> estourado<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-memoria-abuso-silencioso\">\ud83e\udde0 Mem\u00f3ria (abuso silencioso)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmesg-kern-log\">\ud83d\udcc4 <code>dmesg<\/code> \/ <code>kern.log<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>Out of memory: Kill process 28731 (mysqld) score 932\nKilled process 28731 (mysqld)\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd25 <strong>Cl\u00e1ssico<\/strong>: processo monopolizando RAM.<\/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-journalctl\">\ud83d\udcc4 <code>journalctl<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>systemd-oomd[123]: Memory pressure above threshold\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd34 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>VPS oversold<\/li>\n\n\n\n<li>Aplica\u00e7\u00e3o sem limites<\/li>\n\n\n\n<li>Cache descontrolado<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-disco-i-o-abusivo\">\ud83d\udcbe Disco (I\/O abusivo)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-iostat-syslog\">\ud83d\udcc4 <code>iostat<\/code> + <code>syslog<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>blk_update_request: I\/O error, dev vda, sector 8392731\nEXT4-fs warning: maximal mount count reached\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd34 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Escrita excessiva<\/li>\n\n\n\n<li>Banco de dados sem \u00edndices<\/li>\n\n\n\n<li>Logs crescendo sem rota\u00e7\u00e3o<\/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-logs-de-banco-mariadb-mysql\">\ud83d\udcc4 Logs de banco (MariaDB \/ MySQL)<\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>Slow query log:\nQuery_time: 12.453 Lock_time: 8.921\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd34 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Query pesada causando I\/O e CPU altos<\/li>\n\n\n\n<li>Tabelas sem \u00edndice<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-rede-abuso-ou-ataque\">\ud83c\udf10 Rede (abuso ou ataque)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-nginx-access-log\">\ud83d\udcc4 <code>nginx access.log<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>192.168.1.10 - - [03\/Feb\/2026] &quot;GET \/wp-admin\/admin-ajax.php&quot; 200\n(repetido milhares de vezes)\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udea8 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bot<\/li>\n\n\n\n<li>Plugin WordPress abusivo<\/li>\n\n\n\n<li>Ataque de for\u00e7a bruta indireto<\/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-auth-log\">\ud83d\udcc4 <code>auth.log<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>Failed password for invalid user admin from 45.89.x.x\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd34 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tentativa de brute force<\/li>\n\n\n\n<li>Consumo indireto de CPU e disco<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-processos-e-servicos\">\u2699\ufe0f Processos e servi\u00e7os<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-systemd\">\ud83d\udcc4 <code>systemd<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>service php-fpm.service entered failed state\nStart request repeated too quickly\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd34 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crash por falta de recurso<\/li>\n\n\n\n<li>Loop de restart (consome CPU)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-containers-vps-overselling\">\ud83e\udde9 Containers \/ VPS (overselling)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dmesg\">\ud83d\udcc4 <code>dmesg<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>cgroup: fork rejected by pids controller\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udea9 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Limite de processos atingido<\/li>\n\n\n\n<li>VPS compartilhada abusada por outro cliente<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-wordpress-culpado-frequente\">\ud83e\udde8 WordPress (culpado frequente)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-wp-content-debug-log\">\ud83d\udcc4 <code>wp-content\/debug.log<\/code><\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>PHP Fatal error: Allowed memory size exhausted\n<\/pre><\/div>\n\n\n\n<p>\ud83d\udd34 <strong>Indica<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plugin mal otimizado<\/li>\n\n\n\n<li>Loop de execu\u00e7\u00e3o<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-padroes-que-gritam-abuso\">\ud83d\udd0d Padr\u00f5es que gritam \u201cABUSO\u201d<\/h2>\n\n\n\n<p>Se voc\u00ea v\u00ea <strong>isso em conjunto<\/strong>, \u00e9 quase certeza:<\/p>\n\n\n\n<p>\u2714 rein\u00edcio frequente de servi\u00e7os<br>\u2714 OOM Killer<br>\u2714 <code>SIGKILL<\/code> em processos<br>\u2714 logs crescendo r\u00e1pido<br>\u2714 CPU baixa mas sistema lento (I\/O wait alto)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Logs abuso de recursos. logs s\u00e3o praticamente \u201cconfiss\u00e3o espont\u00e2nea\u201d de abuso de recursos quando voc\u00ea sabe onde olhar \ud83d\udc40Vou organizar por tipo [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2954,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,1279],"tags":[],"class_list":["post-2949","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gerenciamento-servidor","category-linux"],"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>Logs que indicam abuso de recursos no servidor Linux<\/title>\n<meta name=\"description\" content=\"Aprenda a identificar abuso de CPU, mem\u00f3ria, disco e rede analisando logs do Linux, Nginx, PHP-FPM e banco de dados antes que o servidor caia.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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