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https://issues.apache.org/jira/browse/IGNITE-4106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15875007#comment-15875007
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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/1556
IGNITE-4106: SQL: parallelize sql queries over cache local partitions
Merged with IGNITE-1.9.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gridgain/apache-ignite ignite-4106-1.9
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/ignite/pull/1556.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 #1556
----
commit 608032b900a51a7fba99e383c0fe0d8a37558cbb
Author: AMRepo <[email protected]>
Date: 2017-02-20T18:24:29Z
Implemented.
commit b7c5ae313fa7c4cc6765e2f3ce8eb30d46c93f10
Author: AMRepo <[email protected]>
Date: 2017-02-20T19:53:33Z
Merge remote-tracking branch 'apache/ignite-1.9' into ignite-4106-1.9
# Conflicts:
#
modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/IgniteH2Indexing.java
#
modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/opt/GridH2IndexBase.java
#
modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/twostep/GridMapQueryExecutor.java
#
modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/twostep/GridReduceQueryExecutor.java
#
modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/twostep/msg/GridH2QueryRequest.java
#
modules/indexing/src/test/java/org/apache/ignite/internal/processors/query/IgniteSqlSplitterSelfTest.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: 1.7
> Reporter: Andrew Mashenkov
> Assignee: Andrew Mashenkov
> Labels: performance
> Fix For: 1.9
>
> 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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