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Posted to commits@cassandra.apache.org by "Paulo Motta (Jira)" <ji...@apache.org> on 2021/03/23 09:41:00 UTC
[jira] [Updated] (CASSANDRA-13338) JMX: EstimatedPartitionCount /
SnapshotSize are expensive
[ https://issues.apache.org/jira/browse/CASSANDRA-13338?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Paulo Motta updated CASSANDRA-13338:
------------------------------------
Complexity: Low Hanging Fruit
Labels: lhf (was: )
> JMX: EstimatedPartitionCount / SnapshotSize are expensive
> ---------------------------------------------------------
>
> Key: CASSANDRA-13338
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13338
> Project: Cassandra
> Issue Type: Improvement
> Components: Legacy/Observability
> Reporter: Corentin Chary
> Priority: Normal
> Labels: lhf
>
> EstimatedPartitionCount / EstimatedRowCount / SnapshotSize seem particularly expensive. For example on our system org.apache.cassandra.metrics:type=ColumnFamily,name=SnapshotsSize can take as much as half a second.
> All this cumulated means that export stats for all your tables (with metrics-graphite or jmx_exporter) is going to take quite some time.
> We should certainly try to find the most expensive end points and see if there is a way to cache some of the values.
> cc: [~rgerard]
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