Uploaded image for project: 'IronJacamar'
  1. IronJacamar
  2. JBJCA-1305

Performance degradation using fair semaphores in heavily contended workloads

    XMLWordPrintable

Details

    • Enhancement
    • Resolution: Done
    • Major
    • WildFly/IronJacamar 1.3.2.Final
    • WildFly/IronJacamar 1.3.1.Final
    • Core
    • None

    Description

      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.

      Attachments

        Issue Links

          blocks

          Enhancement - An enhancement to or refactoring of existing functionality that is not configurable by an end user (typically a change made by an internal team that affects users) JBEAP-2418 Incorporate JCA version that allows fairness configuration of semaphores for managed pools

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

          Enhancement - An enhancement to or refactoring of existing functionality that is not configurable by an end user (typically a change made by an internal team that affects users) WFLY-5965 Incorporate JCA version that allows fairness configuration of semaphores for managed pools

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Closed

          Activity

            People

              jpederse@redhat.com Jesper Pedersen
              johara@redhat.com John O'Hara
              Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: