[jboss-dev-forums] [Design of JBoss Portal] - Re: portal clustering problem when using optimistic locking

[prabhat.jha@jboss.com]

I ran tests with use_query_cache=false and following configuraiton (just to recap)


  | <attribute name="NodeLockingScheme">PESSIMISTIC</attribute>
  | <attribute name="IsolationLevel">READ_COMMITTED</attribute>
  | <attribute name="CacheMode">INVALIDATION_SYNC</attribute>
  | 

Results are better. Previously, I used to get very good scalability upto 3 nodes but with 4 nodes, perf was equal to that of 2 nodes. Now, upto 3 nodes, I get close to linear scalability and with 4 nodes perf is equal to that of 3 nodes. With 5 nodes, results are as before.

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