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Posted to issues@carbondata.apache.org by sgururajshetty <gi...@git.apache.org> on 2018/07/25 12:38:35 UTC
[GitHub] carbondata pull request #2558: [CARBONDATA-2648] Documentation for support f...
GitHub user sgururajshetty opened a pull request:
https://github.com/apache/carbondata/pull/2558
[CARBONDATA-2648] Documentation for support for COLUMN_META_CACHE in create table and a…
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sgururajshetty/carbondata master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/2558.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 #2558
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commit 529f80dda6db3ce34e0baf766b03a9a13190b286
Author: sgururajshetty <sg...@...>
Date: 2018-07-25T12:44:07Z
Documentation for support for COLUMN_META_CACHE in create table and alter table properties
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[GitHub] carbondata issue #2558: [CARBONDATA-2648] Documentation for support for COLU...
Posted by manishgupta88 <gi...@git.apache.org>.
Github user manishgupta88 commented on the issue:
https://github.com/apache/carbondata/pull/2558
LGTM
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[GitHub] carbondata issue #2558: [CARBONDATA-2648] Documentation for support for COLU...
Posted by CarbonDataQA <gi...@git.apache.org>.
Github user CarbonDataQA commented on the issue:
https://github.com/apache/carbondata/pull/2558
Build Success with Spark 2.1.0, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder1/7505/
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[GitHub] carbondata pull request #2558: [CARBONDATA-2648] Documentation for support f...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/carbondata/pull/2558
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[GitHub] carbondata pull request #2558: [CARBONDATA-2648] Documentation for support f...
Posted by manishgupta88 <gi...@git.apache.org>.
Github user manishgupta88 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2558#discussion_r205102509
--- Diff: docs/data-management-on-carbondata.md ---
@@ -141,7 +141,103 @@ This tutorial is going to introduce all commands and data operations on CarbonDa
'SORT_SCOPE'='NO_SORT')
```
**NOTE:** CarbonData also supports "using carbondata". Find example code at [SparkSessionExample](https://github.com/apache/carbondata/blob/master/examples/spark2/src/main/scala/org/apache/carbondata/examples/SparkSessionExample.scala) in the CarbonData repo.
-
+
+ - **Caching Min/Max Value for Required Columns**
+ By default, CarbonData caches min and max values of all the columns in schema. As the load increases, the memory required to hold the min and max values increases considerably. This feature enables you to configure min and max values only for the required columns, resulting in optimized memory usage.
+
+ Following are the valid values for COLUMN_META_CACHE:
+ * If you want no column min/max values to be caches in the driver.
+
+ ```
+ COLUMN_META_CACHE=’’
+ ```
+
+ * If you want only col1 min/max values to be cached in the driver.
+
+ ```
+ COLUMN_META_CACHE=’col1’
+ ```
+
+ * If you want min/max values to be caches in driver for all the specified columns.
--- End diff --
correct the typo...caches to cached
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