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https://issues.apache.org/jira/browse/CASSANDRA-13338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17910626#comment-17910626
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Stefan Miklosovic commented on CASSANDRA-13338:
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I was investigating what's up here and I compiled it all here (1).
(1) https://lists.apache.org/thread/6sd0lmcn3lbmg8ovnznzbvnkqqk3xyv4
> JMX: EstimatedPartitionCount is expensive
> -----------------------------------------
>
> Key: CASSANDRA-13338
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13338
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Legacy/Observability
> Reporter: Corentin Chary
> Assignee: Stefan Miklosovic
> Priority: Normal
> Labels: lhf
> Attachments: Average_Time_vs_Threads_Combined_snapshot_listing.png,
> Average_Time_vs_Threads_Combined_true_snapshot_size.png,
> Percentiles_vs_Threads_Combined_snapshot_listing.png,
> Percentiles_vs_Threads_Combined_true_snapshot_size.png,
> Throughput_vs_Threads_Combined _true_snapshot_size.png,
> Throughput_vs_Threads_Combined_snapshot_listing.png
>
>
> 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.- (This was resolved by CASSANDRA-18111).
> All this accumulated 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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