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From "Carl Yeksigian (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10323) Add more MaterializedView metrics
Date Wed, 30 Sep 2015 20:06:04 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14938771#comment-14938771
] 

Carl Yeksigian commented on CASSANDRA-10323:
--------------------------------------------

Overall +1. I pushed [a branch|https://github.com/carlyeks/cassandra/tree/review/10323/3.0]
with just a few nits; if you could take a look at them [~cnlwsu].

* Removed the overload of {{mutateMV}} since we haven't hit a stable release with MV in yet.
* Don't initialize the {{viewLockAcquire}} and {{viewRead}} metrics if this is a view. I was
expecting those values to be updated when I was looking at the metrics; probably makes sense
to just not have them at all for views instead of having the unused metrics.
* Formatting miscellany


> Add more MaterializedView metrics
> ---------------------------------
>
>                 Key: CASSANDRA-10323
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10323
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: T Jake Luciani
>            Assignee: Chris Lohfink
>             Fix For: 3.0.0 rc2
>
>         Attachments: trunk-10323-v2.txt, trunk-10323.txt
>
>
> We need to add more metrics to help understand where time is spent in materialized view
writes. We currently track the ratio of async base -> view mutations that fail.
> We should also add
>   * The amount of time spent waiting for the partition lock (contention)
>   * The amount of time spent reading data 
> Any others? 
> [~carlyeks] [~jkni] 



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