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https://issues.apache.org/jira/browse/CASSANDRA-13040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15745135#comment-15745135
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Stefan Podkowinski commented on CASSANDRA-13040:
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||3.0||3.x||trunk||
|[branch|https://github.com/spodkowinski/cassandra/tree/CASSANDRA-13040-3.0]|[branch|https://github.com/spodkowinski/cassandra/tree/CASSANDRA-13040-3.x]|[branch|https://github.com/spodkowinski/cassandra/tree/CASSANDRA-13040-trunk]|
|[dtest|http://cassci.datastax.com/view/Dev/view/spodkowinski/job/spodkowinski-CASSANDRA-13040-3.0-dtest/]|[dtest|http://cassci.datastax.com/view/Dev/view/spodkowinski/job/spodkowinski-CASSANDRA-13040-3.x-dtest/]|[dtest|http://cassci.datastax.com/view/Dev/view/spodkowinski/job/spodkowinski-CASSANDRA-13040-trunk-dtest/]|
|[testall|http://cassci.datastax.com/view/Dev/view/spodkowinski/job/spodkowinski-CASSANDRA-13040-3.0-testall/]|[testall|http://cassci.datastax.com/view/Dev/view/spodkowinski/job/spodkowinski-CASSANDRA-13040-3.x-testall/]|[testall|http://cassci.datastax.com/view/Dev/view/spodkowinski/job/spodkowinski-CASSANDRA-13040-trunk-testall/]|
> Estimated TS drop-time histogram updated with Cell.NO_DELETION_TIME
> -------------------------------------------------------------------
>
> Key: CASSANDRA-13040
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13040
> Project: Cassandra
> Issue Type: Bug
> Reporter: Stefan Podkowinski
> Assignee: Stefan Podkowinski
> Attachments: 13040-3.0.patch
>
>
> Starting with 3.0, {{MetadataCollector.updateLocalDeletionTime(int
> newLocalDeletionTime)}} will be called with {{cell.localDeletionTime()}} in
> order to update the min/max deletion times as well as the
> {{estimatedTombstoneDropTime}} histogram. Currently this also happens for
> {{Cell.NO_DELETION_TIME}} ({{Integer.MAX_VALUE}}), which causes the histogram
> to be called for every regular cell.
> This can be easily verified by using {{sstablemetadata}} on any sstable. You
> should be able to find a very high value for 2147483647 in the "Estimated
> tombstone drop times" section.
> At this point, I don't think this is causing serious harm, but could be a
> performance issue (see linked ticket). Calculated droppable TS times should
> not be affected.
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