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From "C. Scott Andreas (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-14347) Read payload metrics
Date Sun, 18 Nov 2018 17:49:00 GMT

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

C. Scott Andreas updated CASSANDRA-14347:
-----------------------------------------
    Component/s: Metrics

> Read payload metrics
> --------------------
>
>                 Key: CASSANDRA-14347
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14347
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Metrics
>            Reporter: Sumanth Pasupuleti
>            Assignee: Sumanth Pasupuleti
>            Priority: Major
>             Fix For: 4.x
>
>
> 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. This can prove useful
in fire-fighting an incident, and can help resolve the issue since its easy to narrow down
to the specific culprit prepared statement.
> 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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