JDBC persistence adapter, intermittent performance degradation when a durable
subscriber of priority messages falls behind
--------------------------------------------------------------------------------------------------------------------------
Key: AMQ-3288
URL: https://issues.apache.org/jira/browse/AMQ-3288
Project: ActiveMQ
Issue Type: Bug
Components: Message Store
Affects Versions: 5.5.0
Reporter: Gary Tully
Assignee: Gary Tully
Fix For: 5.6.0
Scenario: Messages are produced with rolling priority - jmsPriority =
sendCount%10 so there are always high priority messages in the mix.
One durable client attempting to catch up when being behind by 100k messages.
Symptom: About the time the priority of messages being consumed switched from
9, to 8, the delay happened. Why it was happening, the log scrolled very fast
with the percentage of memory use change debug command. Delivery was suspended.
This happened for about a minute or so. During this time, one cleanup timer
tripped, there wasn't any delay for the cleanup sql.
It was strange, before the delay, the warning about memory stayed around 100%
or so, but during the delay, it jumped up to 4000%.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
