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Re: High CPU Utilization
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created by <a href="https://community.jboss.org/people/walanj.amol">Amol Walanj</a> in <i>Performance Tuning</i> - <a href="https://community.jboss.org/message/734226#734226">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hi , Thanks for quick reply.</p><p>Its during the runtime when we fired the bulk orders. (Client with 20 threads)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>What I had observed from jconsole is , the tomcat threads (http-0.0.0.0-8080-*) are taking more time to complete.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I had tried to find the top 5 threads consuming the CPU during this run using the shell script.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The Partial O/P is as follows :</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><table><tbody><tr><td style=";">  PID USER  </td><td style=";">PR  NI  VIRT  RES  SHR S %CPU %MEM</td><td style=";">TIME+  COMMAND                                                     </td><td style=";"></td></tr><tr><td style=";">11935 sis   </td><td style=";">15   0 6342m 3.7g  11m S<strong> 29.5</strong> 47.0   0:10.37 java                                                        </td><td style=";"></td></tr><tr><td style=";"><strong>11681</strong> sis   </td><td style=";">15   0 6342m 3.7g  11m R <strong>25.6</strong> 47.0   0:27.65 java                                                        </td><td style=";"></td></tr><tr><td style=";">11662 sis   </td><td style=";">15   0 6342m 3.7g  11m S<strong> 23.6</strong> 47.0   0:31.89 java                                                        </td><td style=";"></td></tr><tr><td style=";">11682 sis   </td><td style=";">15   0 6342m 3.7g  11m S <strong>21.6</strong> 47.0   0:31.34 java                                                        </td><td style=";"></td></tr><tr><td style=";">11663 sis   </td><td style=";">15   0 6342m 3.7g  11m S <strong>21.6</strong> 47.0   0:33.84 java </td></tr></tbody></table><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Pasting here the thread Dump for one of the PID.The others dump also shows the same dump.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>========> Java LWP: <strong>11681 </strong>- Native Thread ID=2da1</p><p>"http-0.0.0.0-8080-15" daemon prio=10 tid=0x00002aaac0877000 nid=0x2da1 waiting on condition [0x0000000042e7f000]</p><p>   java.lang.Thread.State: WAITING (parking)</p><p>        at sun.misc.Unsafe.park(Native Method)</p><p>        - parking to wait for  <0x0000000746df1920> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)</p><p>        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)</p><p>        at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)</p><p>        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:842)</p><p>        at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1178)</p><p>        at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)</p><p>        at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)</p><p>        at org.jboss.security.plugins.JBossAuthorizationManager.internalAuthorization(JBossAuthorizationManager.java:470)</p><p>        at org.jboss.security.plugins.JBossAuthorizationManager.authorize(JBossAuthorizationManager.java:125)</p><p>        at org.jboss.security.plugins.javaee.WebAuthorizationHelper.hasUserDataPermission(WebAuthorizationHelper.java:201)</p><p>        at org.jboss.web.tomcat.security.JBossWebRealm.hasUserDataPermission(JBossWebRealm.java:643)</p><p>        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:461)</p><p>        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)</p><p>        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)</p><p>        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)</p><p>        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)</p><p>        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)</p><p>        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)</p><p>        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)</p><p>        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)</p><p>        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:905)</p><p>        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:592)</p><p>        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:2036)</p><p>        at java.lang.Thread.run(Thread.java:662)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks,</p><p>Amol</p></div>
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