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From "Peter Vary (Jira)" <j...@apache.org>
Subject [jira] [Resolved] (HIVE-23819) Use ranges in ValidReadTxnList serialization
Date Tue, 04 Aug 2020 07:18:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Peter Vary resolved HIVE-23819.
-------------------------------
    Fix Version/s: 4.0.0
       Resolution: Fixed

Pushed to master.

Thanks for the patch [~pvargacl]!

> Use ranges in ValidReadTxnList serialization
> --------------------------------------------
>
>                 Key: HIVE-23819
>                 URL: https://issues.apache.org/jira/browse/HIVE-23819
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Peter Varga
>            Assignee: Peter Varga
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 4.0.0
>
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> Time to time we see a case, when the open / aborted transaction count is high and often
the aborted transactions come in continues ranges.
> When the transaction count goes high the serialization / deserialization to hive.txn.valid.txns
conf gets slower and produces a large config value.
> Using ranges in the string representation can mitigate the issue somewhat.



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