[jboss-jira] [JBoss JIRA] (JBJCA-1305) Performance degradation using fair semaphores in heavily contended workloads

[John O'Hara (JIRA)]

John O'Hara created JBJCA-1305:
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             Summary: Performance degradation using fair semaphores in heavily contended workloads
                 Key: JBJCA-1305
                 URL: https://issues.jboss.org/browse/JBJCA-1305
             Project: IronJacamar
          Issue Type: Enhancement
          Components: Core
    Affects Versions: WildFly/IronJacamar 1.3.1.Final
            Reporter: John O'Hara
            Assignee: Jesper Pedersen


Under heavy contention, a fair semaphore causes performance degradation for threads trying to acquire a permit from the semaphore.  Changing the semaphore to not fair alleviates the performance degradation under heavy contention.



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