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From "Alwyn Davis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12649) Add BATCH metrics
Date Mon, 07 Nov 2016 22:10:59 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15645629#comment-15645629
] 

Alwyn Davis commented on CASSANDRA-12649:
-----------------------------------------

Thanks for the awesome feedback! I'll try moving the metrics to `BatchStatement` and verifying
the performance impact with some JMH benchmarks.

> Add BATCH metrics
> -----------------
>
>                 Key: CASSANDRA-12649
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12649
>             Project: Cassandra
>          Issue Type: Wish
>            Reporter: Alwyn Davis
>            Priority: Minor
>             Fix For: 3.x
>
>         Attachments: 12649-3.x.patch, stress-batch-metrics.tar.gz, stress-trunk.tar.gz,
trunk-12649.txt
>
>
> To identify causes of load on a cluster, it would be useful to have some additional metrics:
> * *Mutation size distribution:* I believe this would be relevant when tracking the performance
of unlogged batches.
> * *Logged / Unlogged Partitions per batch distribution:* This would also give a count
of batch types processed. Multiple distinct tables in batch would just be considered as separate
partitions.



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