Simon Willnauer created LUCENE-5310:
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Summary: Merge Threads unnecessarily block on SerialMergeScheduler
Key: LUCENE-5310
URL: https://issues.apache.org/jira/browse/LUCENE-5310
Project: Lucene - Core
Issue Type: Improvement
Components: core/index
Affects Versions: 4.5, 5.0
Reporter: Simon Willnauer
Priority: Minor
Fix For: 4.6, 5.0
I have been working on a high level merge multiplexer that shares threads
across different IW instances and I came across the fact that
SerialMergeScheduler actually blocks incoming thread is a merge in going on.
Yet this blocks threads unnecessarily since we pull the merges in a loop
anyway. We should use a tryLock operation instead of syncing the entire method?
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