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https://issues.apache.org/jira/browse/IGNITE-8925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16532658#comment-16532658
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Vladimir Ozerov commented on IGNITE-8925:
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Test run:
https://ci.ignite.apache.org/viewLog.html?buildId=1452396&tab=buildResultsDiv&buildTypeId=IgniteTests24Java8_RunAllSql
> SQL: Limit default number of threads for CREATE INDEX to 4
> ----------------------------------------------------------
>
> Key: IGNITE-8925
> URL: https://issues.apache.org/jira/browse/IGNITE-8925
> Project: Ignite
> Issue Type: Task
> Components: sql
> Reporter: Vladimir Ozerov
> Assignee: Vladimir Ozerov
> Priority: Major
> Fix For: 2.7
>
>
> Currently we allocate {{CPUs/4}} cores for index creation. On powerful
> machines we may allocate too much threads, so that "Maximum number of
> retries" error start to appear in {{BPlusTree}}.
> We need to limit default number of allocated cores to 4, because:
> - Our original benchmarks shown that >4 cores do not give significant boost
> (due to retries and page splits)
> - Avoid "too much retries" error
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