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https://issues.apache.org/jira/browse/SOLR-6359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14246618#comment-14246618
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Forest Soup edited comment on SOLR-6359 at 12/17/14 10:01 AM:
--------------------------------------------------------------

The "numRecordsToKeep" and "maxNumLogsToKeep" values should be in the 
<updateLog>.like below.
    <!-- Enables a transaction log, used for real-time get, durability, and
         and solr cloud replica recovery.  The log can grow as big as
         uncommitted changes to the index, so use of a hard autoCommit
         is recommended (see below).
         "dir" - the target directory for transaction logs, defaults to the
                solr data directory.  -->
    <updateLog>
      <str name="dir">${solr.ulog.dir:}</str>
      <int name="numRecordsToKeep">10000</int>
      <int name="maxNumLogsToKeep">100</int>
    </updateLog>


was (Author: forest_soup):
The "numRecordsToKeep" and "maxNumLogsToKeep" values should be in the 
<updateLog>., like below. Right?
    <!-- Enables a transaction log, used for real-time get, durability, and
         and solr cloud replica recovery.  The log can grow as big as
         uncommitted changes to the index, so use of a hard autoCommit
         is recommended (see below).
         "dir" - the target directory for transaction logs, defaults to the
                solr data directory.  -->
    <updateLog>
      <str name="dir">${solr.ulog.dir:}</str>
      <int name="numRecordsToKeep">10000</int>
      <int name="maxNumLogsToKeep">100</int>
    </updateLog>

> Allow customization of the number of records and logs kept by UpdateLog
> -----------------------------------------------------------------------
>
>                 Key: SOLR-6359
>                 URL: https://issues.apache.org/jira/browse/SOLR-6359
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Ramkumar Aiyengar
>            Assignee: Mark Miller
>            Priority: Minor
>             Fix For: 5.0, Trunk
>
>
> Currently {{UpdateLog}} hardcodes the number of logs and records it keeps, 
> and the hardcoded numbers (100 records, 10 logs) can be quite low (esp. the 
> records) in an heavily indexing setup, leading to full recovery even if Solr 
> was just stopped and restarted.
> These values should be customizable (even if only present as expert options).



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