When our support folks talk to customers using Apache Tomcat server, they observe that most of the Tomcat users face certain common memory issues that can often be fixed with a little effort. Most memory issues in your Tomcat server can be fixed by analysing:
Thread Dumps: Analysing memory stats often help in locating the exact memory issue. With Applications Manager's Java Runtime Monitor, instantly view JVM thread dumps and know the exact status of each thread. Take multiple thread dumps at regular intervals to analyse and identify deadlocked threads, waiting threads, blocked threads etc. Most execution problems like slow processing performance of your Tomcat Server can be solved simply by analysing JVM thread dumps.
Heap Dumps:You should also analyse your heap dumps whenever your memory consumption is high. Analysing the use of memory your Tomcat server is making at a point of time can help solve a lot of memory issues and reveal important information like the amount of memory a given thread uses before completing a task and the possibilities of potential memory leaks.
CPU Usage:Although analyzing thread and heap dumps can reveal significant information about tuning your server setups, analysing the CPU usage of each thread can be really useful in understanding the load on your CPU. While most admins regularly tend to watch out for their CPU usage, there is hardly any monitoring tool that delivers this crucial info. With Applications Manager however, admins can instantly view CPU usage and identify threads consuming more CPU and tune their servers in time.
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