[jboss-user] [Performance Tuning] - Re: High CPU Utilization

[Amol Walanj]

Amol Walanj [https://community.jboss.org/people/walanj.amol] created the discussion

"Re: High CPU Utilization"

To view the discussion, visit: https://community.jboss.org/message/734226#734226

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Hi , Thanks for quick reply.
Its during the runtime when we fired the bulk orders. (Client with 20 threads)

What I had observed from jconsole is , the tomcat threads (http-0.0.0.0-8080-*) are taking more time to complete.



I had tried to find the top 5 threads consuming the CPU during this run using the shell script.

The Partial O/P is as follows :

|   PID USER   | PR  NI  VIRT  RES  SHR S %CPU %MEM | TIME+  COMMAND                                                      |  |
| 11935 sis    | 15   0 6342m 3.7g  11m S *29.5* 47.0   0:10.37 java                                                         |  |
| *11681* sis    | 15   0 6342m 3.7g  11m R *25.6* 47.0   0:27.65 java                                                         |  |
| 11662 sis    | 15   0 6342m 3.7g  11m S *23.6* 47.0   0:31.89 java                                                         |  |
| 11682 sis    | 15   0 6342m 3.7g  11m S *21.6* 47.0   0:31.34 java                                                         |  |
| 11663 sis    | 15   0 6342m 3.7g  11m S *21.6* 47.0   0:33.84 java  |

Pasting here the thread Dump for one of the PID.The others dump also shows the same dump.


========> Java LWP: *11681* - Native Thread ID=2da1
"http-0.0.0.0-8080-15" daemon prio=10 tid=0x00002aaac0877000 nid=0x2da1 waiting on condition [0x0000000042e7f000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for  <0x0000000746df1920> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:842)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1178)
        at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
        at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
        at org.jboss.security.plugins.JBossAuthorizationManager.internalAuthorization(JBossAuthorizationManager.java:470)
        at org.jboss.security.plugins.JBossAuthorizationManager.authorize(JBossAuthorizationManager.java:125)
        at org.jboss.security.plugins.javaee.WebAuthorizationHelper.hasUserDataPermission(WebAuthorizationHelper.java:201)
        at org.jboss.web.tomcat.security.JBossWebRealm.hasUserDataPermission(JBossWebRealm.java:643)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:461)
        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:905)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:592)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2036)
        at java.lang.Thread.run(Thread.java:662)


Thanks,
Amol
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