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  1. JBoss Enterprise Application Platform
  2. JBEAP-24268

Clustering: performance degradation in ejb-servlet scenario

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      Clustering: performance degradation in ejb-servlet scenario

      In the EJB+SERVLET scenario (4 nodes cluster using both web and ejb replicated cache with MOD_JK load balancer) we noticed a ~10% in performance degratation between EAP7 and EAP8:

      • average response time EAP-8.0.0.Beta-CR1: ~6.83 msec (see and )
      • average response time EAP-7.4.8.GA-CR2: ~5.22 msec (see )
      • average response time EAP-7.4.7: ~5.12 msec

      Cluster nodes are configured as follows:

      embed-server --server-config=standalone-ha.xml
if (outcome != success) of /subsystem=jgroups:read-attribute(name=default-stack)
/subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcp)
else
/subsystem=jgroups:write-attribute(name=default-stack,value=tcp)
/subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcp)
end-if
/subsystem=infinispan/cache-container=web/replicated-cache=testReplWeb:add()
/subsystem=infinispan/cache-container=web/replicated-cache=testReplWeb/component=locking:write-attribute(name=isolation, value=REPEATABLE_READ)
/subsystem=infinispan/cache-container=web/replicated-cache=testReplWeb/component=transaction:write-attribute(name=mode, value=BATCH)
/subsystem=infinispan/cache-container=web/replicated-cache=testReplWeb/store=file:add()
/subsystem=infinispan/cache-container=web:write-attribute(name=default-cache, value=testReplWeb)
/subsystem=infinispan/cache-container=ejb/replicated-cache=testReplEjb:add()
/subsystem=infinispan/cache-container=ejb/replicated-cache=testReplEjb/component=locking:write-attribute(name=isolation, value=REPEATABLE_READ)
/subsystem=infinispan/cache-container=ejb/replicated-cache=testReplEjb/component=transaction:write-attribute(name=mode, value=BATCH)
/subsystem=infinispan/cache-container=ejb/replicated-cache=testReplEjb/store=file:add()
/subsystem=infinispan/cache-container=ejb:write-attribute(name=default-cache, value=testReplEjb)

      No exceptions are thrown in the server logs which might look as the culprit for the degradation;

      Looking at the graphs it looks like the situation gets worse over time (tests last about 18 minutes and degradation is worse in the last half);

        1. EAP-7.4.8.GA-CR2.png
          41 kB
          Tommaso Borgato
        2. EAP-8.0.0.Beta-CR1.png
          47 kB
          Tommaso Borgato
        3. EAP-8.0.0.Beta-CR1-two.png
          43 kB
          Tommaso Borgato

              pferraro@redhat.com Paul Ferraro
              tborgato@redhat.com Tommaso Borgato
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