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Posted to commits@cassandra.apache.org by "Alain RODRIGUEZ (JIRA)" <ji...@apache.org> on 2018/06/22 13:03:00 UTC
[jira] [Commented] (CASSANDRA-13023) Add droppable tombstone
metrics
[ https://issues.apache.org/jira/browse/CASSANDRA-13023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16520319#comment-16520319 ]
Alain RODRIGUEZ commented on CASSANDRA-13023:
---------------------------------------------
I think this metric is currently available (found in 3.11.1) and was for a long time.
It's a bit hidden though, the metric is exposed as org.apache.cassandra.db:type=ColumnFamilies,keyspace=<keyspace>,columnfamily=<table>.
Attibute: DroppableTombstoneRatio
It would make sense to me to make it available under org.apache.cassandra.metrics instead, but I don't know about this historical choice, so I am missing some context.
[~spodxx@gmail.com], be aware that this is available meanwhile, fwiw. :)
!droppableTombstoneRatio.png!
> Add droppable tombstone metrics
> -------------------------------
>
> Key: CASSANDRA-13023
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13023
> Project: Cassandra
> Issue Type: Improvement
> Components: Observability
> Reporter: Stefan Podkowinski
> Priority: Major
> Attachments: droppableTombstoneRatio.png
>
>
> Currently it's only possible to inspect the ratio of droppable tombstones on sstable basis using the {{sstablemetadata}} tool. It would be very useful to have this information provided as part of Cassandra metrics as well, e.g. to get an idea on the effectiveness of tombstone eviction during compactions over time.
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