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https://issues.apache.org/jira/browse/IGNITE-6084?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vladimir Ozerov updated IGNITE-6084:
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Fix Version/s: (was: 2.2)
> SQL: improve lazy execution threading model
> -------------------------------------------
>
> Key: IGNITE-6084
> URL: https://issues.apache.org/jira/browse/IGNITE-6084
> Project: Ignite
> Issue Type: Task
> Components: sql
> Affects Versions: 2.1
> Reporter: Vladimir Ozerov
> Labels: performance
>
> Currently "lazy" mode creates new thread for every query. Moreover, messages
> are queued to query pool first and then re-submitted to target thread. This
> makes execution of small queries inefficient.
> We need to do the following:
> 1) Define separate pool for lazy execution
> 2) It's size should be about 4 x cores, due to blocking nature of lazy
> execution
> 3) Set thread timeouts
> 4) Submit new query execute request to pool's shared queue from
> {{GridIoManager}} directly
> 5) Submit "next page" requests to directly to proper thread, using [nodeId,
> queryId, segment] triplet
> 6) Cancel request can be submitted to query pool and re-submitted to
> appropriate threads afterwards.
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