anselme dewavrin created AMQ-4987: ------------------------------------- Summary: io wait on replicated levelDB slaves Key: AMQ-4987 URL: https://issues.apache.org/jira/browse/AMQ-4987 Project: ActiveMQ Issue Type: Test Components: activemq-leveldb-store Affects Versions: 5.9.0 Environment: debian VM 2.6.32-5-amd64, jdk7 Reporter: anselme dewavrin Priority: Minor
Dear all, I set up a 3-nodes replicatedLevelDB activeMQ cluster as explained on the activemq site. I made a message injector using the php stomp client described here : http://stomp.fusesource.org/documentation/php/book.html Then I injected persistent messages as fast as possible (giving about 600 messages/s). Everything works fine, then I measured the servers' activity with "vmstat 1". I saw no iowait on the master node, but 20% on both slaves. This would impeach scalabitity I suppose. The machines are not swapping (paging). Here is what I tried, without success : -specify explicitly sync="quorum_mem" -JNI implementation of the leveldb store (and verified it is used) -setting flushDelay to 2000 Does anyone have an idea that I could try ? Many thanks in advance Yours, Anselme -- This message was sent by Atlassian JIRA (v6.1.5#6160)