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From "Anubhav Kale (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-10580) Add latency metrics for dropped messages
Date Wed, 16 Dec 2015 17:40:46 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-10580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15060376#comment-15060376
] 

Anubhav Kale commented on CASSANDRA-10580:
------------------------------------------

My HEAD is indeed pointing to different location: f1c3df0e848638735c790b4817adf6411a52a064.
I pulled down 2.2. via below and then made changes.

git clone http://git-wip-us.apache.org/repos/asf/cassandra.git cassandra-2.2

I will dig some more on why this did not work correctly.

> Add latency metrics for dropped messages
> ----------------------------------------
>
>                 Key: CASSANDRA-10580
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10580
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Coordination, Observability
>         Environment: Production
>            Reporter: Anubhav Kale
>            Assignee: Anubhav Kale
>            Priority: Minor
>             Fix For: 3.2, 2.2.x
>
>         Attachments: 0001-Metrics.patch, 10580-Metrics.patch, 10580.patch, 2.2-All-Comments.patch,
CASSANDRA-10580-Head.patch, Trunk-All-Comments.patch, Trunk.patch
>
>
> In our production cluster, we are seeing a large number of dropped mutations. At a minimum,
we should print the time the thread took to get scheduled thereby dropping the mutation (We
should also print the Message / Mutation so it helps in figuring out which column family was
affected). This will help find the right tuning parameter for write_timeout_in_ms. 
> The change is small and is in StorageProxy.java and MessagingTask.java. I will submit
a patch shortly.



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