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Posted to commits@cassandra.apache.org by "Sumanth Pasupuleti (JIRA)" <ji...@apache.org> on 2018/03/28 05:48:00 UTC

[jira] [Updated] (CASSANDRA-14347) Read payload metrics

     [ https://issues.apache.org/jira/browse/CASSANDRA-14347?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sumanth Pasupuleti updated CASSANDRA-14347:
-------------------------------------------
    Summary: Read payload metrics  (was: Read payload metrics/logging)

> Read payload metrics
> --------------------
>
>                 Key: CASSANDRA-14347
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14347
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Sumanth Pasupuleti
>            Priority: Major
>             Fix For: 4.0
>
>
> We currently have MutationSizeHistogram that gives an idea of write payloads. This JIRA is about adding similar capability to reads, which can benefit us with the following
>  * Histogram of payload sizes at Prepared Statement level
>  * Count of queries that meet vs do not meet SLO w.r.t. payload size
> We could also log queries that result in payload exceeding SLO.
> Read payload metrics could potentially be derived using network statistics, however, it is difficult to isolate payloads due to reads, given that there could be a bunch of other operations in C* that can amount to observed network traffic (like repairs, streaming, etc).



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