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From "Chris Lohfink (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-10323) Add more MaterializedView metrics
Date Mon, 28 Sep 2015 21:50:05 GMT


Chris Lohfink commented on CASSANDRA-10323:

have it recording time from when base mutation is applied to memtable until when the CL.ONE
is achieved on the async write to the MVs (I think). Added a "pending", but its global not
per table. Also tracking per table how much time is spent on the local read and how much time
it takes to acquire partition lock.

> Add more MaterializedView metrics
> ---------------------------------
>                 Key: CASSANDRA-10323
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: T Jake Luciani
>            Assignee: Chris Lohfink
>              Labels: lhf
>             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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