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- javamelody
- The goal of JavaMelody is to monitor Java or Java EE applications servers in QA and production environments. It is not a tool to simulate requests from users, it is a tool to measure and calculate statistics on real operation of an application depending on the usage of the application by users. JavaMelody is opensource (LGPL) and production ready: in production in an application of 25 person years. JavaMelody is easy to integrate in most applications and is lightweight (no profiling and no database). JavaMelody is mainly based on statistics of requests and on evolution charts. It allows to improve applications in QA and production and help to: give facts about the average response times and number of executions make decisions when trends are bad, before problems become too serious optimize based on the more limiting response times find the root causes of response times verify the real improvement after optimizations It includes summary charts showing the evolution over time of the following indicators: Number of executions, mean execution times and percentage of errors of http requests, sql requests or methods of business façades (if EJB3 or if Spring) Java memory Java CPU Number of user sessions Number of jdbc connections These charts can be viewed on the current day, week, month or year.
- 2009-12-05 to freesoftware, gpl, java, jmx, monitoring, software, sysadmin, tomcat by lorello
- Using JConsole
- Java SE Monitoring and Management Guide
- 2009-07-11 to jconsole, jvm, letture, monitoring, tomcat by lorello
- MaximDim : Dmitri Maximovich's notebook
- After previous post about monitoring JVM memory with MRTG I've got few comments suggesting that it should be possible to do the same thing via SNMP protocol, support for which is built in into JVM at least since version 1.5. It seems like a better approach, at least from system load prospective (no need to run jstat/jps every few minutes) and apparently enabling SNMP agent in the JVM suppose to have very negligible impact on JVM performance. Indeed, it turned out that it's surprisingly simple to do if you know what you're doing ;) Big thanks goes to Daniel Fuchs from Sun, for providing very useful comments and adding to my (quite limited) understanding of SNMP protocol.
- 2009-07-11 to jvm, letture, monitoring, mrtg, tomcat by lorello
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