[jboss-jira] [JBoss JIRA] (JBJCA-1127) Contention fix when returning connections
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https://issues.jboss.org/browse/JBJCA-1127?page=com.atlassian.jira.plugin...
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Jeremy Whiting commented on JBJCA-1127:
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I suspect the pool modification of the permits should be in the synchronized block.
A couple of additional small changes to John's commit to move code outside the
block.
https://github.com/whitingjr/ironjacamar/commit/ecde3e126f4ad28ec848bc211...
Contention fix when returning connections
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Key: JBJCA-1127
URL: https://issues.jboss.org/browse/JBJCA-1127
Project: IronJacamar
Issue Type: Enhancement
Components: Performance
Affects Versions: 1.0.23.Final, 1.1.2.Final
Reporter: Ståle Pedersen
Assignee: Jesper Pedersen
During benchmarking we saw a lot of contention when hibernate is returning connections.
With this fix below the total contention time (aggregated across all threads) over a 5min
period in s/state for that lock in SemaphoreArrayListManagedConnectionPool has gone from
39min 55s to 17s.
https://github.com/johnaoahra80/ironjacamar/commit/f32885818bc0048522a086...
We havent seen any errors with this change in the IJ testsuite or in the benchmark
we're running.
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