Purpose

This page outlines how to analyze JIRA application performance using Jvmtop. 

• Jvmtop provides a overview of all running JVMs on a machine. 
• Jvmtop can analyze a JVM process to get an idea of which threads are consuming CPU.

• Jvmtop also includes a CPU console profiler.

 Jvmtop is currently in alpha state.

 See below for other examples on how to understand which threads in JIRA application are consuming a lot of CPU:

• Troubleshooting Jira performance with Thread dumps 
• Use Windows Process Explorer to troubleshoot Jira server Performance 
  

Solution

• Get a copy of Jvmtop

• Example of output from jvmtop:

  $ jvmtop
   
  JvmTop 0.8.0 alpha - 17:57:33, x86_64,  8 cpus, Mac OS X 10.10., load avg 22.40
   http://code.google.com/p/jvmtop
    PID MAIN-CLASS      HPCUR HPMAX NHCUR NHMAX    CPU     GC    VM USERNAME   #T DL
    366                  243m 2031m  152m  446m 63.33%  0.11% A6U65 pkirkeby   76
    819 moteMavenServer   55m  505m   31m  130m 14.07%  0.40% A6U65 pkirkeby   19
    754 m.jvmtop.JvmTop    3m  235m   10m  130m  1.01%  0.29% O7U25 pkirkeby   16

• Example of output from jvmtop monitoring a specific process:

  $ jvmtop <pid>
   
   JvmTop 0.8.0 alpha - 17:37:55, x86_64,  8 cpus, Mac OS X 10.10., load avg 2.22
   http://code.google.com/p/jvmtop
   PID 17817: org.apache.catalina.startup.Bootstrap
   ARGS: start
   VMARGS: -Djava.util.logging.config.file=/Users/pkirkeby/Atlassian/deploym[...]
   VM: Oracle Corporation Java HotSpot(TM) 64-Bit Server VM 1.8.0_31
   UP:  2:49m  #THR: 111  #THRPEAK: 111  #THRCREATED: 184  USER: pkirkeby
   GC-Time:  0: 0m   #GC-Runs: 123       #TotalLoadedClasses: 44485
   CPU: 11.43% GC:  2.95% HEAP: 281m / 910m NONHEAP: 341m /  n/a
    TID   NAME                                    STATE    CPU  TOTALCPU BLOCKEDBY
      192 RMI TCP Connection(2)-172.20.0       RUNNABLE  3.82%     0.05%
       87 atlassian-scheduler-quartz1.cl  TIMED_WAITING  0.23%     0.39%
      193 JMX server connection timeout   TIMED_WAITING  0.17%     0.00%
       84 atlassian-scheduler-quartz1.cl  TIMED_WAITING  0.16%     0.56%
       83 atlassian-scheduler-quartz1.cl  TIMED_WAITING  0.15%     0.38%
       80 jira-monitoring-plugin          TIMED_WAITING  0.02%     0.06%
      179 Java2D Disposer                       WAITING  0.01%     0.00%
      110 Navlink Plugin Executor:thread        WAITING  0.01%     0.02%
       59 I/O dispatcher 6                     RUNNABLE  0.01%     0.07%
      119 http-bio-8080-AsyncTimeout      TIMED_WAITING  0.01%     0.12%
   Note: Only top 10 threads (according cpu load) are shown!