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https://issues.apache.org/jira/browse/LUCENE-5862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shawn Heisey reopened LUCENE-5862:
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After another rebuild, two of the shards ended up at 25GB instead of 20GB.
> Old segments not deleted on merge
> ---------------------------------
>
> Key: LUCENE-5862
> URL: https://issues.apache.org/jira/browse/LUCENE-5862
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 4.9
> Environment: Linux bigindy5 3.14.1-1.el6.elrepo.x86_64 #1 SMP Mon Apr
> 14 19:29:19 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
> java version "1.7.0_55"
> Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
> Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode)
> [root@bigindy5 s5_0]# cat /etc/redhat-release
> CentOS release 6.5 (Final)
> Reporter: Shawn Heisey
> Fix For: 5.0, 4.10
>
>
> After a full rebuild with the dataimport handler on a Solr install upgraded
> to Solr 4.9.0, I ended up with an index that was considerably larger than the
> one it replaced (built by 4.7.2), 28GB instead of 20GB. I also upgraded a
> third-party component at the same time, to a version which has been tested
> with Solr 4.9.0. The config didn't change at all. Optimizing the index did
> not shrink it.
> At first I thought there must have been something different about the way the
> new version worked, or possibly a change/bug in the third-party component.
> After looking deeper, I discovered that the optimization process had created
> one segment that was 20GB in size, but there were also a number of other
> segments on the disk, all of which were several hours older than the large
> segment. Another optimize created a new segment of 20GB, and the previous
> segment of 20GB was deleted, but the older segments remained.
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