Usage of the temp store index by the PList needs the be improved
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Key: AMQ-3351
URL: https://issues.apache.org/jira/browse/AMQ-3351
Project: ActiveMQ
Issue Type: Improvement
Components: Message Store
Affects Versions: 5.5.0
Reporter: Gary Tully
Assignee: Gary Tully
Fix For: 5.6.0
Problem manifests when systemUsage memory limit is triggered and the pending
message cursor for non persistent messages is flushing its in memory cache to
temp store, this is taking a long time and in the mean time, other cursors that
need to flush to disk are blocking on the temp store, and other sends to that
destination are blocked.
In this scenario, the broker will come back to life once the flush completes.
The problem is that the all cursors will see the same limit at the same time
and try and flush.
The usage of the temp store index by the PList needs the be improved, it is not
optimal at the moment as it uses too much space in the index. It uses a page
per entry and reading from it, once the page cache is exhausted, is too slow.
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