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https://issues.apache.org/jira/browse/HIVE-9331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14279978#comment-14279978
]
Lefty Leverenz commented on HIVE-9331:
--------------------------------------
Doc note: This removes configuration parameters *hive.mapjoin.optimized.keys*
and *hive.mapjoin.lazy.hashtable* from HiveConf.java, so the wiki needs to be
updated. Their removal from the default list for
*hive.security.authorization.sqlstd.confwhitelist* is automatic as of HIVE-8534
and doesn't need a wiki update.
* [Configuration Properties -- hive.mapjoin.optimized.keys |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.mapjoin.optimized.keys]
* [Configuration Properties -- hive.mapjoin.lazy.hashtable |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.mapjoin.lazy.hashtable]
* [_doc sample for removal_ |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.stats.map.parallelism]
* [Configuration Properties -- hive.security.authorization.sqlstd.confwhitelist
|
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.security.authorization.sqlstd.confwhitelist]
A release note would be nice too.
> get rid of pre-optimized-hashtable memory optimizations
> -------------------------------------------------------
>
> Key: HIVE-9331
> URL: https://issues.apache.org/jira/browse/HIVE-9331
> Project: Hive
> Issue Type: Bug
> Affects Versions: 0.15.0
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Labels: TODOC15
> Fix For: 0.15.0
>
> Attachments: HIVE-9331.01.patch, HIVE-9331.01.patch,
> HIVE-9331.02.patch, HIVE-9331.patch, HIVE-9331.patch
>
>
> These were added in 13 because optimized hashtable couldn't make it in; they
> reduced memory usage by some amount (10-25%), and informed the design of the
> optimized hashtable, but now extra settings and code branches are just
> confusing and may have their own bugs. Might as well remove them.
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