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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9693) Introduce a stats cache for aggregate stats in HBase metastore [hbase-metastore branch]
Date Wed, 01 Apr 2015 18:47:53 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14391215#comment-14391215
] 

Alan Gates commented on HIVE-9693:
----------------------------------

HiveConf.java
{code}
METASTORE_HBASE_CACHE_MAX_READER_WAIT("hive.metastore.hbase.cache.max.reader.wait", "1000ms",
new TimeValidator(TimeUnit.MILLISECONDS)
{code}
AggregateStatsCache
{code}
long maxReaderWaitTime =
    HiveConf.getTimeVar(conf, HiveConf.ConfVars.METASTORE_HBASE_CACHE_MAX_READER_WAIT,
    TimeUnit.SECONDS);
...
isLocked = candidateList.readLock.tryLock(maxReaderWaitTime, TimeUnit.MILLISECONDS);
{code}
It's wobbling between seconds and milliseconds.  Write lock has the same issue.

Let's leave the pom change out as it will create a merge conflict since that change has already
been made in trunk.

Other than that +1.



> Introduce a stats cache for aggregate stats in HBase metastore  [hbase-metastore branch]
> ----------------------------------------------------------------------------------------
>
>                 Key: HIVE-9693
>                 URL: https://issues.apache.org/jira/browse/HIVE-9693
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Metastore
>            Reporter: Vaibhav Gumashta
>            Assignee: Vaibhav Gumashta
>         Attachments: HIVE-9693.1.patch, HIVE-9693.2.patch, HIVE-9693.3.patch
>
>
> NO PRECOMMIT TESTS



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