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From "ASF GitHub Bot (Jira)" <j...@apache.org>
Subject [jira] [Work logged] (HIVE-23819) Use ranges in ValidReadTxnList serialization
Date Mon, 03 Aug 2020 15:30:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23819?focusedWorklogId=465753&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-465753
]

ASF GitHub Bot logged work on HIVE-23819:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 03/Aug/20 15:29
            Start Date: 03/Aug/20 15:29
    Worklog Time Spent: 10m 
      Work Description: pvargacl commented on pull request #1230:
URL: https://github.com/apache/hive/pull/1230#issuecomment-668087223


   @pvary could you merge this?


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Issue Time Tracking
-------------------

    Worklog Id:     (was: 465753)
    Time Spent: 40m  (was: 0.5h)

> 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
>          Time Spent: 40m
>  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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