Ståle Pedersen created JBJCA-1127: ------------------------------------- Summary: Contention fix when returning connections Key: JBJCA-1127 URL: https://issues.jboss.org/browse/JBJCA-1127 Project: IronJacamar Issue Type: Enhancement Components: Performance Affects Versions: 1.1.2.Final, 1.0.23.Final Reporter: Ståle Pedersen Assignee: Jesper Pedersen Fix For: 1.0.24.Final, 1.1.3.Final 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira