Viraj Jasani created PHOENIX-7725:
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Summary: Move IndexVerify Thread Pool to RegionServer level
Key: PHOENIX-7725
URL: https://issues.apache.org/jira/browse/PHOENIX-7725
Project: Phoenix
Issue Type: Improvement
Reporter: Viraj Jasani
As of today, the IndexVerify thread pool is created at the scanner level,
specifically when a GlobalIndexRegionScanner is opened for index verification
operations. This means, a new thread pool is created every time a scanner
opens, even if verification is not needed. Similarly, the thread pool is shut
down when the scanner closes. This is expensive overhead, specifically for the
frequent single row point lookup reads.
Index write operations use a shared thread pool at the regionserver level (pre
and post writer thread pools).
The proposal of this Jira is to move the IndexVerify thread pool from scanner
level to regionserver level. This will eliminate expensive thread pool creation
overhead for each scanner initialization. It will keep the thread pool
management in close alignment with the covered index write path and uncovered
index read path (uncovered index thread pool is now available at regionserver
level).
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