[jboss-jira] [JBoss JIRA] Created: (JBCACHE-1356) "eviction node event queue size is at 98% threshold value of capacity" but wakeUpIntervalSeconds == 1

[Anton Spirkov (JIRA)]

"eviction node event queue size is at 98% threshold value of capacity" but wakeUpIntervalSeconds == 1
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                 Key: JBCACHE-1356
                 URL: http://jira.jboss.com/jira/browse/JBCACHE-1356
             Project: JBoss Cache
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Eviction
    Affects Versions: 2.0.0.GA
         Environment: JDK 1.6.0_5
            Reporter: Anton Spirkov
         Assigned To: Manik Surtani


We constantly receive the following message under load (~500 TPS):

[org.jboss.cache.RegionImpl] putNodeEvent(): eviction node event queue size is at 98% threshold value of capacity: 200000 Region: / You will need to reduce the wakeUpIntervalSeconds parameter.

However we have reduced the  wakeUpIntervalSeconds to 1. This is a snapshot from our configuration:

<attribute name="CacheMode">LOCAL</attribute>

        <!-- Max number of milliseconds to wait for a lock acquisition -->
        <attribute name="LockAcquisitionTimeout">15000</attribute>


        <!-- Specific eviction policy configurations. This is LRU -->
        <attribute name="EvictionPolicyConfig">
            <config>
                <attribute name="wakeUpIntervalSeconds">1</attribute>
                <attribute name="policyClass">org.jboss.cache.eviction.LRUPolicy</attribute>

                <!-- Cache wide default -->
                <region name="/_default_">
                    <attribute name="maxNodes">50000</attribute>
                    <attribute name="timeToLiveSeconds">1000</attribute>
                </region>
            </config>
        </attribute>

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