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https://issues.apache.org/jira/browse/IGNITE-8925?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Ozerov updated IGNITE-8925:
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Description:
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
was:
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
> 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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