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https://issues.apache.org/jira/browse/HIVE-7616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14290853#comment-14290853
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Lefty Leverenz commented on HIVE-7616:
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Doc error: The description of *hive.hashtable.initialCapacity* refers to a
parameter that existed in patch 2
("hive.hashtable.stats.key.estimate.adjustment") but was renamed
*hive.hashtable.key.count.adjustment* in patch 3.
{quote}
+ HIVEHASHTABLEKEYCOUNTADJUSTMENT("hive.hashtable.key.count.adjustment",
1.0f,
+ "Adjustment to mapjoin hashtable size derived from table and column
statistics; the estimate" +
+ " of the number of keys is divided by this value. If the value is 0,
statistics are not used" +
+ "and hive.hashtable.initialCapacity is used instead."),
+ HIVEHASHTABLETHRESHOLD("hive.hashtable.initialCapacity", 100000, "Initial
capacity of " +
+ "mapjoin hashtable if statistics are absent, or if
hive.hashtable.stats.key.estimate.adjustment is set to 0"),
{quote}
Opened HIVE-9457 to fix this.
> pre-size mapjoin hashtable based on statistics
> ----------------------------------------------
>
> Key: HIVE-7616
> URL: https://issues.apache.org/jira/browse/HIVE-7616
> Project: Hive
> Issue Type: Improvement
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Labels: TODOC14
> Fix For: 0.14.0
>
> Attachments: HIVE-7616.01.patch, HIVE-7616.02.patch,
> HIVE-7616.03.patch, HIVE-7616.04.patch, HIVE-7616.05.patch,
> HIVE-7616.06.patch, HIVE-7616.07.patch, HIVE-7616.patch
>
>
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