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Is there a way to solve this without cluster?
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created by <a href="http://community.jboss.org/people/mglowacki">Michal Glowacki</a> in <i>Performance Tuning</i> - <a href="http://community.jboss.org/message/632711#632711">View the full discussion</a>
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<div class="jive-rendered-content"><p class="wikiPara">I have a very powerful machine, with 80 cores and 32GB RAM, but when there is a traffic peak, it goes down. It hosts Apacje/JBoss/Postgres with deployed Seam web applications and EJB 3 for app. logic.</p><p class="wikiPara" style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p class="wikiPara">In thread dumps I see a lot of:</p><blockquote class="wikiBlockquote" style="background-color: #f5f5f5; border-left-width: 4px; border-left-color: #b9d5e0; padding-top: 5px; padding-bottom: 5px; padding-left: 5px; margin: 10px;">Thread: ajp-0.0.0.0-8009-14 : priority:5, demon:true, threadId:115, threadState:BLOCKED -</blockquote><blockquote class="wikiBlockquote" style="background-color: #f5f5f5; border-left-width: 4px; border-left-color: #b9d5e0; padding-top: 5px; padding-bottom: 5px; padding-left: 5px; margin: 10px;">waiting on 0x7406ce55 (a java.util.WeakHashMap) org.jboss.naming.ENCFactory.getObjectInstance(ENCFactory.java:114)</blockquote><p class="wikiPara">and</p><blockquote class="wikiBlockquote" style="background-color: #f5f5f5; border-left-width: 4px; border-left-color: #b9d5e0; padding-top: 5px; padding-bottom: 5px; padding-left: 5px; margin: 10px;">Thread: ajp-0.0.0.0-8009-2 : priority:5, demon:true, threadId:103, threadState:BLOCKED </blockquote><blockquote class="wikiBlockquote" style="background-color: #f5f5f5; border-left-width: 4px; border-left-color: #b9d5e0; padding-top: 5px; padding-bottom: 5px; padding-left: 5px; margin: 10px;">- waiting on 0x672e12af (a java.util.HashMap) org.jboss.metadata.web.jboss.JBossWebMetaData.getRunAsIdentity(JBossWebMetaData.java:839)</blockquote><p class="wikiPara">and</p><blockquote class="wikiBlockquote" style="background-color: #f5f5f5; border-left-width: 4px; border-left-color: #b9d5e0; padding-top: 5px; padding-bottom: 5px; padding-left: 5px; margin: 10px;">Thread: ajp-0.0.0.0-8009-14 : priority:5, demon:true, threadId:115, threadState:BLOCKED </blockquote><blockquote class="wikiBlockquote" style="background-color: #f5f5f5; border-left-width: 4px; border-left-color: #b9d5e0; padding-top: 5px; padding-bottom: 5px; padding-left: 5px; margin: 10px;">- waiting on 0x7406ce55 (a java.util.WeakHashMap) org.jboss.naming.ENCFactory.getObjectInstance(ENCFactory.java:114)</blockquote><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>As I understand, there is too many invocations of methods trying to access naming service. In Tomcat, I have set maxthreads on 8009 connector to 1200, however the dumps shows the problems starts when it's over 600-700.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I believe that setting up cluster should help, as the traffic will be distributed to several jboss instances. However, as I afraid cluster like a fire - is there anything more I can do?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Regards,</p><p>Michal</p></div>
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