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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (IGNITE-4106) SQL: parallelize sql queries over cache local partitions
Date Mon, 21 Nov 2016 08:06:58 GMT

     [ https://issues.apache.org/jira/browse/IGNITE-4106?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vladimir Ozerov updated IGNITE-4106:
------------------------------------
    Fix Version/s: 2.0

> SQL: parallelize sql queries over cache local partitions
> --------------------------------------------------------
>
>                 Key: IGNITE-4106
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4106
>             Project: Ignite
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.6, 1.7
>            Reporter: Andrew Mashenkov
>            Assignee: Andrew Mashenkov
>              Labels: performance
>             Fix For: 2.0
>
>         Attachments: 1node-4thread.jfr, 4node-1thread.jfr
>
>
> If we run SQL query on cache partitioned over several cluster nodes, it will be split
into several queries running in parallel. But really we will have one thread per query on
each node.
> So, for now, to improve SQL query performance we need to run more Ignite instances or
split caches manually.
> It seems to be better to split local SQL queries over cache partitions, so we would be
able to parallelize SQL query on every single node and utilize CPU more efficiently.



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