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https://issues.apache.org/jira/browse/IGNITE-4106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15693220#comment-15693220
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ASF GitHub Bot commented on IGNITE-4106:
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GitHub user AMashenkov opened a pull request:
https://github.com/apache/ignite/pull/1278
IGNITE-4106: SQL: parallelize sql queries over cache local partitions
Indexes splitted
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gridgain/apache-ignite ignite-4106-2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/ignite/pull/1278.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1278
----
commit cede430c27f1bc73a3fd61a3569c164d16869816
Author: Andrey V. Mashenkov <[email protected]>
Date: 2016-11-18T12:19:33Z
Merged
commit e8329f93003c77d1070cf88be3cbaf19e7845656
Author: Andrey V. Mashenkov <[email protected]>
Date: 2016-11-18T12:47:05Z
index splitted
commit 4e88be252ce35482ac4b885e8e97b7fa16d3e53b
Author: Andrey V. Mashenkov <[email protected]>
Date: 2016-11-24T12:46:15Z
Merge remote-tracking branch 'apache/master' into ignite-4106-2
# Conflicts:
#
modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/twostep/GridMergeIndex.java
----
> 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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