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Posted to commits@cassandra.apache.org by "David Capwell (Jira)" <ji...@apache.org> on 2020/02/19 01:51:00 UTC
[jira] [Updated] (CASSANDRA-15589) Add histogram to prepared
statements and expose as virtual table
[ https://issues.apache.org/jira/browse/CASSANDRA-15589?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Capwell updated CASSANDRA-15589:
--------------------------------------
Change Category: Operability
Complexity: Normal
Status: Open (was: Triage Needed)
> Add histogram to prepared statements and expose as virtual table
> -----------------------------------------------------------------
>
> Key: CASSANDRA-15589
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15589
> Project: Cassandra
> Issue Type: Improvement
> Components: Observability/Metrics
> Reporter: Jon Haddad
> Priority: Normal
>
> One of the biggest challenges as an operator is understanding what queries are being executed and how long they take. We have the ability to take short samples via profileload, but it’s lacking the full diagnostics that keeping histograms on each prepared statement could give us. Having this would be a massive benefit to most operators as they currently have no idea what Cassandra is actually doing.
> Before committing let’s be sure to record some CPU flame graphs to ensure there isn’t noticeable performance overhead.
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