[jira] [Created] (IGNITE-12684) Optimize count of threads for rebuild indexes

[Anton Vinogradov (Jira)]

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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