[jbossts-issues] [JBoss JIRA] (JBTM-2990) ThreadUtil performance improvement
Jonathan Halliday (JIRA)
issues at jboss.org
Tue Feb 6 09:52:00 EST 2018
Jonathan Halliday created JBTM-2990:
Summary: ThreadUtil performance improvement
Project: JBoss Transaction Manager
Issue Type: Enhancement
Components: Transaction Core
Affects Versions: 5.7.2.Final
Reporter: Jonathan Halliday
Assignee: Jonathan Halliday
The ThreadUtil changes introduced for the bug fix under JBTM-2673, cause lock contention on the static WeakHashMap under high load.
The proposed fix is to partially reintroduce the earlier behavior of caching the value in a ThreadLocal, since the dominant use case is pooled threads repeatedly looking up their own identity. The global lookup capability introduced for the fix remains necessary for less common use cases, but the locking can be taken off the critical path for most workloads.
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