Kirill Tkalenko created IGNITE-12684:
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Summary: Optimize count of threads for rebuild indexes
Key: IGNITE-12684
URL: https://issues.apache.org/jira/browse/IGNITE-12684
Project: Ignite
Issue Type: Improvement
Reporter: Kirill Tkalenko
Assignee: Kirill Tkalenko
Fix For: 2.9
We were recently implemented the new property {{INDEX_REBUILDING_PARALLELISM}}
(by issue IGNITE-11979).
That fix do possible to rebuild indexes, after restart without index.bin or
restore from snapshot to another topology, in parallel threads.
But now the process of rebuild can to consume a lot of threads, which limited
on INDEX_REBUILDING_PARALLELISM * AVAILABLE_PROC_CNT (count of thread in public
pool).
For example in case of INDEX_REBUILDING_PARALLELISM = 28 and 64 CPU it will be
more then 1.5К threads.
Look at the method, it will create dedicate thread on each invocation
`org.apache.ignite.internal.processors.query.schema.SchemaIndexCacheVisitorImpl#processPartitionsAsync`
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