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Posted to commits@cassandra.apache.org by "Benjamin Lerer (Jira)" <ji...@apache.org> on 2022/02/10 08:25:00 UTC
[jira] [Commented] (CASSANDRA-17225) Add a virtual table for exposing batch metrics
[ https://issues.apache.org/jira/browse/CASSANDRA-17225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17490028#comment-17490028 ]
Benjamin Lerer commented on CASSANDRA-17225:
--------------------------------------------
The CI [run|https://app.circleci.com/pipelines/github/blerer/cassandra/264/workflows/21f7deb3-a721-424d-b1af-742411616e93] looks fine. Failures are unrelated.
> Add a virtual table for exposing batch metrics
> ----------------------------------------------
>
> Key: CASSANDRA-17225
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17225
> Project: Cassandra
> Issue Type: Improvement
> Components: Feature/Virtual Tables
> Reporter: Benjamin Lerer
> Assignee: Michael Burman
> Priority: Normal
> Labels: AdventCalendar2021, lhf
> Fix For: 4.x
>
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> There are some existing metrics within BatchMetrics that provide metrics about related to the different types of Batches being executed. We should expose those through a virtual table.
> +Additional information for newcomers:+
> A new class should be created for representing the new Virtual Table in {{org.apache.cassandra.db.virtual}}. You can look at {{ThreadPoolsTable}} for an example of virtual table implementation and to {{TableMetricTables}} for how Histogram metrics can be exposed. The new table will need to be registered in {{SystemViewsKeyspace}}.
> Some unit tests should be added. For some example of virtual table tests you can look at {{SystemPropertiesTableTest}}.
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