[jira] [Updated] (KYLIN-2269) Reduce MR memory usage for global dict
[
https://issues.apache.org/jira/browse/KYLIN-2269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
kangkaisen updated KYLIN-2269:
--
Attachment: KYLIN-2269.patch
Update the patch to add the check for shardBy column.
> Reduce MR memory usage for global dict
> --
>
> Key: KYLIN-2269
> URL: https://issues.apache.org/jira/browse/KYLIN-2269
> Project: Kylin
> Issue Type: Improvement
>Affects Versions: v1.6.0
>Reporter: kangkaisen
>Assignee: kangkaisen
> Attachments: KYLIN-2269.patch
>
>
> currently, in {{Build Base Cuboid Data}}, if user use the global dict and the
> global dict size significantly larger the mapper memory size, the
> {{CachedTreeMap}} will load all values as much as possible and the soft
> references object will stick around for a while when GC, So which will make
> the {{Build Base Cuboid Data}} mapper pause for a long time even could not
> finish.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
[jira] [Updated] (KYLIN-2269) Reduce MR memory usage for global dict
[
https://issues.apache.org/jira/browse/KYLIN-2269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
kangkaisen updated KYLIN-2269:
--
Attachment: (was: KYLIN-2269.patch)
> Reduce MR memory usage for global dict
> --
>
> Key: KYLIN-2269
> URL: https://issues.apache.org/jira/browse/KYLIN-2269
> Project: Kylin
> Issue Type: Improvement
>Affects Versions: v1.6.0
>Reporter: kangkaisen
>Assignee: kangkaisen
> Attachments: KYLIN-2269.patch
>
>
> currently, in {{Build Base Cuboid Data}}, if user use the global dict and the
> global dict size significantly larger the mapper memory size, the
> {{CachedTreeMap}} will load all values as much as possible and the soft
> references object will stick around for a while when GC, So which will make
> the {{Build Base Cuboid Data}} mapper pause for a long time even could not
> finish.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
[jira] [Updated] (KYLIN-2269) Reduce MR memory usage for global dict
[
https://issues.apache.org/jira/browse/KYLIN-2269?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
kangkaisen updated KYLIN-2269:
--
Attachment: KYLIN-2269.patch
This is the patch.
This patch has run a some time in our production env. which could reduce the
MR memory usage and mapper running time of Base Cuboid for global dict
significantly.
> Reduce MR memory usage for global dict
> --
>
> Key: KYLIN-2269
> URL: https://issues.apache.org/jira/browse/KYLIN-2269
> Project: Kylin
> Issue Type: Improvement
>Affects Versions: v1.6.0
>Reporter: kangkaisen
>Assignee: kangkaisen
> Attachments: KYLIN-2269.patch
>
>
> currently, in {{Build Base Cuboid Data}}, if user use the global dict and the
> global dict size significantly larger the mapper memory size, the
> {{CachedTreeMap}} will load all values as much as possible and the soft
> references object will stick around for a while when GC, So which will make
> the {{Build Base Cuboid Data}} mapper pause for a long time even could not
> finish.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
