"Henrik Nyberg" wrote : 
  | 
  | Settings for the cache are:
  | * Asynchronous replication (replAsync-service.xml out of the box with the 
suggested modification for windows, i.e. loopback = true).
  | * no transactions (IsolationLevel.NONE)
  | 

Have no transactions is very bad, as the cache replicates after *every single* 
modification.

If you cannot be forced to use transactions, at least enable queueing, so 
modifications are replicated in batches.

Also, if you stress-test the cache, you might be better off using the fc-fast 
config from JGroups/conf.

If this doesn't solve your problems, please open a bug report on JIRA 
(http://jira.jboss.com/jira/browse/JBCACHE).

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