{"id":937,"date":"2025-02-18T11:59:16","date_gmt":"2025-02-18T14:59:16","guid":{"rendered":"http:\/\/www.isacaguiar.com.br\/blog\/?p=937"},"modified":"2025-03-17T08:25:09","modified_gmt":"2025-03-17T11:25:09","slug":"roteiro-para-analise-com-jvisualvm-e-memory-analyzer","status":"publish","type":"post","link":"https:\/\/www.isacaguiar.com.br\/blog\/roteiro-para-analise-com-jvisualvm-e-memory-analyzer\/","title":{"rendered":"Roteiro para An\u00e1lise com JVisualVM e Memory Analyzer"},"content":{"rendered":"<h1 data-start=\"314\" data-end=\"375\"><strong data-start=\"316\" data-end=\"375\">\ud83d\udccc Roteiro para An\u00e1lise com JVisualVM e Memory Analyzer<\/strong><\/h1>\n<h3 data-start=\"376\" data-end=\"410\"><strong data-start=\"380\" data-end=\"410\">1\ufe0f\u20e3 Prepara\u00e7\u00e3o do Ambiente<\/strong><\/h3>\n<p data-start=\"411\" data-end=\"474\">\u2705 <strong data-start=\"413\" data-end=\"474\">Configurar a aplica\u00e7\u00e3o para permitir monitoramento remoto<\/strong><\/p>\n<ol data-start=\"475\" data-end=\"972\">\n<li style=\"list-style-type: none;\">\n<ol data-start=\"475\" data-end=\"972\">\n<li data-start=\"475\" data-end=\"910\">No script de inicializa\u00e7\u00e3o do microservi\u00e7o, adicione as flags necess\u00e1rias para habilitar o JMX:<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<div class=\"hcb_wrap\">\n<pre class=\"wp-block-preformatted prism line-numbers lang-java\" data-lang=\"BASH\">-Dcom.sun.management.jmxremote \\\r\n-Dcom.sun.management.jmxremote.port=22001 \\\r\n-Dcom.sun.management.jmxremote.rmi.port=22001 \\\r\n-Dcom.sun.management.jmxremote.ssl=false \\\r\n-Dcom.sun.management.jmxremote.authenticate=false \\\r\n-Djava.rmi.server.hostname=&lt;ip_do_servidor&lt; \\\r\n-Djava.net.preferIPv4Stack=true\r\n<\/pre>\n<\/div>\n<ol data-start=\"475\" data-end=\"972\">\n<li data-start=\"475\" data-end=\"910\"><strong data-start=\"914\" data-end=\"936\">Reinicie o servi\u00e7o<\/strong> ap\u00f3s adicionar essas configura\u00e7\u00f5es.\n<ol data-start=\"475\" data-end=\"972\"><\/ol>\n<p data-start=\"974\" data-end=\"1048\">\u2705 <strong data-start=\"976\" data-end=\"1015\">Verificar se a porta est\u00e1 acess\u00edvel<\/strong> No Windows, teste a conex\u00e3o com:<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"wp-block-preformatted prism line-numbers lang-java\" data-lang=\"POWERSHELL\">Test-NetConnection -ComputerName &lt;ip_do_servidor&lt; -Port 22001\r\n<\/pre>\n<\/div>\n<p>Se <code data-start=\"1132\" data-end=\"1150\">TcpTestSucceeded<\/code> for <code data-start=\"1155\" data-end=\"1161\">True<\/code>, o JVisualVM conseguir\u00e1 se conectar.<\/li>\n<\/ol>\n<h3 data-start=\"1205\" data-end=\"1244\"><strong data-start=\"1209\" data-end=\"1244\">2\ufe0f\u20e3 Monitoramento com JVisualVM<\/strong><\/h3>\n<p data-start=\"1245\" data-end=\"1271\">\u2705 <strong data-start=\"1247\" data-end=\"1271\">Conectar ao servidor<\/strong><\/p>\n<ol data-start=\"1272\" data-end=\"1505\">\n<li style=\"list-style-type: none;\">\n<ol data-start=\"1272\" data-end=\"1505\">\n<li data-start=\"1272\" data-end=\"1311\">Abra o <strong data-start=\"1282\" data-end=\"1295\">JVisualVM<\/strong> no seu Windows.<\/li>\n<li data-start=\"1312\" data-end=\"1380\">V\u00e1 em <strong data-start=\"1321\" data-end=\"1351\">&#8220;File&#8221; &gt; &#8220;Add Remote Host&#8221;<\/strong> e adicione o IP do servidor.<\/li>\n<li data-start=\"1381\" data-end=\"1460\">Em <strong data-start=\"1387\" data-end=\"1399\">&#8220;Remote&#8221;<\/strong>, adicione a conex\u00e3o:<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<div class=\"hcb_wrap\">\n<pre class=\"wp-block-preformatted prism line-numbers lang-java\" data-lang=\"MAKEFILE\"> &lt;ip_do_servidor&gt;:22001\r\n\r\n<\/pre>\n<\/div>\n<ol data-start=\"1272\" data-end=\"1505\">\n<li data-start=\"1381\" data-end=\"1460\">Clique na conex\u00e3o para abrir os detalhes.\n<ol data-start=\"1272\" data-end=\"1505\"><\/ol>\n<p data-start=\"1507\" data-end=\"1535\">\u2705 <strong data-start=\"1509\" data-end=\"1535\">Analisar CPU e Threads<\/strong><\/p>\n<ol data-start=\"1536\" data-end=\"2134\">\n<li data-start=\"1536\" data-end=\"1928\">\n<p data-start=\"1539\" data-end=\"1570\">V\u00e1 at\u00e9 <strong data-start=\"1546\" data-end=\"1559\">&#8220;Monitor&#8221;<\/strong> e observe:<\/p>\n<ul data-start=\"1574\" data-end=\"1928\">\n<li data-start=\"1574\" data-end=\"1717\"><strong data-start=\"1576\" data-end=\"1589\">CPU Usage<\/strong> \u2192 Deve ter um comportamento est\u00e1vel. Se houver <strong data-start=\"1637\" data-end=\"1657\">picos constantes<\/strong>, pode indicar um loop infinito ou consumo excessivo de CPU.<\/li>\n<li data-start=\"1721\" data-end=\"1822\"><strong data-start=\"1723\" data-end=\"1738\">Heap Memory<\/strong> \u2192 Verifique se h\u00e1 crescimento cont\u00ednuo da mem\u00f3ria sem redu\u00e7\u00e3o (poss\u00edvel vazamento).<\/li>\n<li data-start=\"1826\" data-end=\"1928\"><strong data-start=\"1828\" data-end=\"1839\">Threads<\/strong> \u2192 Se houver <strong data-start=\"1852\" data-end=\"1881\">muitas threads bloqueadas<\/strong>, pode indicar um <strong data-start=\"1899\" data-end=\"1927\">problema de concorr\u00eancia<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"1930\" data-end=\"2134\">\n<p data-start=\"1933\" data-end=\"1959\">Em <strong data-start=\"1936\" data-end=\"1949\">&#8220;Threads&#8221;<\/strong>, analise:<\/p>\n<ul data-start=\"1963\" data-end=\"2134\">\n<li data-start=\"1963\" data-end=\"2017\"><strong data-start=\"1965\" data-end=\"1987\">Estado das threads<\/strong> (RUNNABLE, BLOCKED, WAITING).<\/li>\n<li data-start=\"2021\" data-end=\"2134\">Se h\u00e1 muitas threads bloqueadas (<code data-start=\"2056\" data-end=\"2065\">BLOCKED<\/code>), pode indicar <strong data-start=\"2081\" data-end=\"2093\">deadlock<\/strong> ou <strong data-start=\"2097\" data-end=\"2133\">recurso concorrente problem\u00e1tico<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p data-start=\"2136\" data-end=\"2257\">\u2705 <strong data-start=\"2138\" data-end=\"2186\">Capturar um Heap Dump para an\u00e1lise detalhada<\/strong> Se houver suspeita de <strong data-start=\"2209\" data-end=\"2233\">vazamento de mem\u00f3ria<\/strong>, gere um <strong data-start=\"2243\" data-end=\"2256\">Heap Dump<\/strong>:<\/p>\n<ol data-start=\"2258\" data-end=\"2427\">\n<li data-start=\"2258\" data-end=\"2293\">Clique no bot\u00e3o <strong data-start=\"2277\" data-end=\"2292\">&#8220;Heap Dump&#8221;<\/strong>.<\/li>\n<li data-start=\"2294\" data-end=\"2360\">O arquivo ser\u00e1 salvo no servidor (<code data-start=\"2331\" data-end=\"2358\">\/tmp\/heapdump-xxxxx.hprof<\/code>).<\/li>\n<li data-start=\"2361\" data-end=\"2427\">Baixe o arquivo para an\u00e1lise posterior com <strong data-start=\"2407\" data-end=\"2426\">Memory Analyzer<\/strong>.<\/li>\n<\/ol>\n<p data-start=\"2429\" data-end=\"2548\">\u2705 <strong data-start=\"2431\" data-end=\"2484\">Capturar um Thread Dump para analisar travamentos<\/strong> Se a aplica\u00e7\u00e3o parecer <strong data-start=\"2508\" data-end=\"2521\">congelada<\/strong> ou com threads bloqueadas:<\/p>\n<ol data-start=\"2549\" data-end=\"2667\">\n<li data-start=\"2549\" data-end=\"2606\">V\u00e1 na aba <strong data-start=\"2562\" data-end=\"2575\">&#8220;Threads&#8221;<\/strong> e clique em <strong data-start=\"2588\" data-end=\"2605\">&#8220;Thread Dump&#8221;<\/strong>.<\/li>\n<li data-start=\"2607\" data-end=\"2667\">Analise quais threads est\u00e3o bloqueadas e suas <strong data-start=\"2656\" data-end=\"2666\">stacks<\/strong>.<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<h3 data-start=\"2674\" data-end=\"2743\"><strong data-start=\"2678\" data-end=\"2743\">3\ufe0f\u20e3 An\u00e1lise de Vazamento de Mem\u00f3ria com Memory Analyzer (MAT)<\/strong><\/h3>\n<p data-start=\"2744\" data-end=\"2833\"><strong data-start=\"2744\" data-end=\"2833\">Caso a aplica\u00e7\u00e3o esteja consumindo muita mem\u00f3ria, use o MAT para an\u00e1lise aprofundada.<\/strong><\/p>\n<ol data-start=\"2834\" data-end=\"3099\">\n<li data-start=\"2834\" data-end=\"2971\">No servidor, gere um Heap Dump manualmente:<\/li>\n<li data-start=\"2834\" data-end=\"2971\">\n<div class=\"hcb_wrap\">\n<pre class=\"wp-block-preformatted prism line-numbers lang-java\" data-lang=\"BASH\">jcmd &lt;PID_DO_PROCESSO&lt; GC.heap_dump \/opt\/smartsim\/logs\/heapdump.hprof\r\n\r\n<\/pre>\n<\/div>\n<\/li>\n<li data-start=\"2834\" data-end=\"2971\">Baixe o arquivo para sua m\u00e1quina Windows (via <code data-start=\"3021\" data-end=\"3026\">scp<\/code> ou WinSCP).<\/li>\n<li data-start=\"2834\" data-end=\"2971\">Abra o <strong data-start=\"3049\" data-end=\"3076\">Eclipse Memory Analyzer<\/strong> e carregue o <code data-start=\"3090\" data-end=\"3098\">.hprof<\/code>.\n<ol data-start=\"2834\" data-end=\"3099\"><\/ol>\n<p data-start=\"3101\" data-end=\"3139\">\u2705 <strong data-start=\"3103\" data-end=\"3139\">Identificar poss\u00edveis vazamentos<\/strong><\/p>\n<ul data-start=\"3140\" data-end=\"3477\">\n<li data-start=\"3140\" data-end=\"3249\">Execute o <strong data-start=\"3152\" data-end=\"3178\">&#8220;Leak Suspects Report&#8221;<\/strong> para identificar classes que ret\u00eam <strong data-start=\"3214\" data-end=\"3248\">grandes quantidades de mem\u00f3ria<\/strong>.<\/li>\n<li data-start=\"3250\" data-end=\"3327\">Verifique <strong data-start=\"3262\" data-end=\"3326\">objetos que n\u00e3o est\u00e3o sendo coletados pelo Garbage Collector<\/strong>.<\/li>\n<li data-start=\"3328\" data-end=\"3477\">Se encontrar <strong data-start=\"3343\" data-end=\"3377\">muitos objetos da mesma classe<\/strong> (por exemplo, <code data-start=\"3392\" data-end=\"3403\">ArrayList<\/code>, <code data-start=\"3405\" data-end=\"3414\">HashMap<\/code>), pode ser um vazamento causado por refer\u00eancias n\u00e3o liberadas.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3 data-start=\"3484\" data-end=\"3522\"><strong data-start=\"3488\" data-end=\"3522\">4\ufe0f\u20e3 Testes de Estresse e Carga<\/strong><\/h3>\n<p data-start=\"3523\" data-end=\"3565\">Para identificar problemas sob alta carga:<\/p>\n<ol data-start=\"3566\" data-end=\"3809\">\n<li data-start=\"3566\" data-end=\"3650\">Use ferramentas como <strong data-start=\"3590\" data-end=\"3607\">Apache JMeter<\/strong> ou <strong data-start=\"3611\" data-end=\"3618\">wrk<\/strong> para simular m\u00faltiplos acessos.<\/li>\n<li data-start=\"3651\" data-end=\"3714\">Monitore a resposta da aplica\u00e7\u00e3o em <strong data-start=\"3690\" data-end=\"3703\">JVisualVM<\/strong> e <strong data-start=\"3706\" data-end=\"3713\">MAT<\/strong>.<\/li>\n<li data-start=\"3715\" data-end=\"3809\">Verifique se h\u00e1 <strong data-start=\"3734\" data-end=\"3770\">crescimento excessivo da mem\u00f3ria<\/strong> sem redu\u00e7\u00e3o (indicativo de vazamento).<\/li>\n<\/ol>\n<h1 data-start=\"3816\" data-end=\"3840\"><strong data-start=\"3818\" data-end=\"3840\">\ud83d\udcca Checklist Final<\/strong><\/h1>\n<p data-start=\"3841\" data-end=\"4219\">\u2705 <strong data-start=\"3843\" data-end=\"3866\">CPU sobrecarregada?<\/strong> \u279d Verificar consumo na aba &#8220;Monitor&#8221; do JVisualVM.<br data-start=\"3917\" data-end=\"3920\" \/>\u2705 <strong data-start=\"3922\" data-end=\"3945\">Threads bloqueadas?<\/strong> \u279d Analisar <strong data-start=\"3957\" data-end=\"3972\">Thread Dump<\/strong>.<br data-start=\"3973\" data-end=\"3976\" \/>\u2705 <strong data-start=\"3978\" data-end=\"4011\">Consumo excessivo de mem\u00f3ria?<\/strong> \u279d Analisar <strong data-start=\"4023\" data-end=\"4036\">Heap Dump<\/strong> com <strong data-start=\"4041\" data-end=\"4048\">MAT<\/strong>.<br data-start=\"4049\" data-end=\"4052\" \/>\u2705 <strong data-start=\"4054\" data-end=\"4079\">Vazamento de mem\u00f3ria?<\/strong> \u279d Relat\u00f3rio <strong data-start=\"4092\" data-end=\"4111\">&#8220;Leak Suspects&#8221;<\/strong> no MAT.<br data-start=\"4119\" data-end=\"4122\" \/>\u2705 <strong data-start=\"4124\" data-end=\"4144\">Aplica\u00e7\u00e3o lenta?<\/strong> \u279d Identificar <strong data-start=\"4159\" data-end=\"4178\">queries pesadas<\/strong> ou <strong data-start=\"4182\" data-end=\"4203\">m\u00e9todos demorados<\/strong> no JVisualVM.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udccc Roteiro para An\u00e1lise com JVisualVM e Memory Analyzer 1\ufe0f\u20e3 Prepara\u00e7\u00e3o do Ambiente \u2705 Configurar a aplica\u00e7\u00e3o para permitir monitoramento remoto No\u2026<\/p>\n","protected":false},"author":1,"featured_media":944,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15,13],"tags":[],"class_list":["post-937","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gestao-operacional","category-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Roteiro para An\u00e1lise com JVisualVM e Memory Analyzer - Blog do Aguiar<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.isacaguiar.com.br\/blog\/roteiro-para-analise-com-jvisualvm-e-memory-analyzer\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Roteiro 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