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Posted to commits@cassandra.apache.org by "Jeremy Hanna (JIRA)" <ji...@apache.org> on 2019/06/13 18:29:07 UTC
[jira] [Updated] (CASSANDRA-8880) Add metrics to monitor the amount
of tombstones created
[ https://issues.apache.org/jira/browse/CASSANDRA-8880?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jeremy Hanna updated CASSANDRA-8880:
------------------------------------
Complexity: Low Hanging Fruit
> Add metrics to monitor the amount of tombstones created
> -------------------------------------------------------
>
> Key: CASSANDRA-8880
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8880
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Michaël Figuière
> Priority: Low
> Labels: lhf, metrics
> Fix For: 2.1.x
>
> Attachments: cassandra-2.1-8880.patch
>
>
> AFAIK there's currently no way to monitor the amount of tombstones created on a Cassandra node. CASSANDRA-6057 has made it possible for users to figure out how many tombstones are scanned at read time, but in write mostly workloads, it may not be possible to realize if some inappropriate queries are generating too many tombstones.
> Therefore the following additional metrics should be added:
> * {{writtenCells}}: amount of cells that have been written
> * {{writtenTombstoneCells}}: amount of tombstone cells that have been written
> Alternatively these could be exposed as a single gauge such as {{writtenTombstoneCellsRatio}}.
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