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https://issues.apache.org/jira/browse/SOLR-14202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17020646#comment-17020646
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Erick Erickson commented on SOLR-14202:
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Do you open any searchers? The default configs have
{code}
<autoCommit>
<maxTime>${solr.autoCommit.maxTime:15000}</maxTime>
<openSearcher>false</openSearcher>
</autoCommit>
<!-- softAutoCommit is like autoCommit except it causes a
'soft' commit which only ensures that changes are visible
but does not ensure that data is synced to disk. This is
faster and more near-realtime friendly than a hard commit.
-->
<autoSoftCommit>
<maxTime>${solr.autoSoftCommit.maxTime:-1}</maxTime>
</autoSoftCommit>
{code}
neither of which open a new searcher. What happens if you set
<openSearcher>true</openSearcher>
or set the autoSoftCommit max time to, say, 15000 (15 seconds)?
Another way to quickly test is to issue
http://server:port/solr/collection/update?commit=true
and see if the segments and/or tlogs disappear.
> Old segments are not deleted after commit
> -----------------------------------------
>
> Key: SOLR-14202
> URL: https://issues.apache.org/jira/browse/SOLR-14202
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: SolrCloud
> Affects Versions: 8.4
> Reporter: Jörn Franke
> Priority: Major
>
> The data directory of a collection is growing and growing. It seems that old
> segments are not deleted. They are only deleting during start of Solr.
> How to reproduce. Have any collection (e.g. the example collection) and start
> indexing documents. Even during the indexing the data directory is growing
> significantly - much more than expected (several magnitudes). if certain
> documents are updated (without significantly increasing the amount of data)
> the index data directory grows again several magnitudes. Even for small
> collections the needed space explodes.
> This reduces significantly if Solr is stopped and then started. During
> startup (not shutdown) Solr purges all those segments if not needed (*
> sometimes some but not a significant amount is deleted during shutdown). This
> is of course not a good workaround for normal operations.
> It does not seem to have a affect on queries (their performance do not seem
> to change).
> The configs have not changed before the upgrade and after (e.g. from Solr 8.2
> to 8.3 to 8.4, not cross major versions), so I assume it could be related to
> Solr 8.4. It may have been also in Solr 8.3 (not sure), but not in 8.2.
>
> IndexConfig is pretty much default: Lock type: native, autoCommit: 15000,
> openSearcher=false, autoSoftCommit -1 (reproducible with autoCommit 5000).
> Nevertheless, it did not happen in previous versions of Solr and the config
> did not change.
>
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