{"id":3857,"date":"2014-07-01T02:38:00","date_gmt":"2014-07-01T00:38:00","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/java-mission-control-52-7u40-deserves-your-attention\/"},"modified":"2014-07-01T02:38:00","modified_gmt":"2014-07-01T00:38:00","slug":"java-mission-control-52-7u40-deserves-your-attention","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/java-mission-control-52-7u40-deserves-your-attention\/","title":{"rendered":"Java Mission Control 5.2 (7u40) deserves your attention"},"content":{"rendered":"<p>Recently, some new versions of java were made available. Most people think Java updates are boring and only security-oriented. But one of the last updates (7u40) includes a feature which deserves attention. I mean Java Mission Control 5.2.<\/p>\n<h3>Hotspot incoming<\/h3>\n<p>If you know the Oracle JRockit JVM a little bit, you might have heard about JMC, which was called JRockit Mission Control in the past. In fact, it\u2019s a tool suite embedded with the Hotspot JDK since this so called 7u40 release which allows to monitor and profile your JVM.<\/p>\n<p>Previously, it was only available for JRockit JVMs and it has now been ported to the Hotspot. JMC is a way more accurate and complete than JConsole or other embedded tools. It does not affect JVM performances more than 1%.<\/p>\n<p><a class=\"easyblog-thumb-preview\" title=\"B006---JMCView1.png\" href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/B006-JMCView1.png\"><img decoding=\"async\" title=\"B006---JMCView1.png\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/B006-JMCView1.png\" alt=\"B006---JMCView1.png\" \/><\/a><\/p>\n<h3>Mission Completed<\/h3>\n<p>JMC gathers low level information thanks to its <strong>Flight Recorder<\/strong> tool which listens and waits for internal events. It can then monitor, manage, profile, and eliminate memory leaks from the JVM.<\/p>\n<p>The new version of JMC now has a new browser with subnodes for available server side services with their states. It is supported by Eclipse 3.8.2\/4.2.2 and later, it allows deeper management of MBeans, especially setting values directly in the attribute tree. It converges with JRockit event management: All information provided by JRockit is now available in the Hotspot as well.<\/p>\n<p><a class=\"easyblog-thumb-preview\" title=\"B006---JMCView2.png\" href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/B006-JMCView2.png\"><img decoding=\"async\" title=\"B006---JMCView2.png\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/B006-JMCView2.png\" alt=\"B006---JMCView2.png\" \/><\/a><\/p>\n<p>To enable JMC, you will have to add the following arguments to the JVM:<\/p>\n<pre class=\"brush: actionscript3; gutter: true; first-line: 1\"><samp><\/samp>-XX:+UnlockCommercialFeatures\n-XX:+|-FlightRecorder\n-XX:+|-StartFlightRecording\n-XX:FlightRecorderOptions=parameter=value<\/pre>\n<h3>Sources<\/h3>\n<p>Oracle: <a href=\"http:\/\/www.oracle.com\/technetwork\/java\/javase\/2col\/jmc-relnotes-2004763.html\">http:\/\/www.oracle.com\/technetwork\/java\/javase\/2col\/jmc-relnotes-2004763.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recently, some new versions of java were made available. Most people think Java updates are boring and only security-oriented. But one of the last updates (7u40) includes a feature which deserves attention. I mean Java Mission Control 5.2. Hotspot incoming If you know the Oracle JRockit JVM a little bit, you might have heard about [&hellip;]<\/p>\n","protected":false},"author":40,"featured_media":3858,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[197],"tags":[389,214,468,355,390],"type_dbi":[],"class_list":["post-3857","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-integration-middleware","tag-hotspot-jvm","tag-java","tag-java-mission-control","tag-java-virtual-machine","tag-jrockit-jvm"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Java Mission Control 5.2 (7u40) deserves your attention - dbi Blog<\/title>\n<meta name=\"description\" content=\"Recently, some new versions of java were made available. Most people think Java updates are boring and only security-oriented. But one of the last updates (7u40) includes a feature which deserves attention. I mean Java Mission Control 5.2.\" \/>\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.dbi-services.com\/blog\/java-mission-control-52-7u40-deserves-your-attention\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java Mission Control 5.2 (7u40) deserves your attention\" \/>\n<meta property=\"og:description\" content=\"Recently, some new versions of java were made available. Most people think Java updates are boring and only security-oriented. But one of the last updates (7u40) includes a feature which deserves attention. 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