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From "Carl Yeksigian (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5044) Allow resizing of threadpools via JMX
Date Mon, 10 Dec 2012 17:49:21 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13528097#comment-13528097
] 

Carl Yeksigian commented on CASSANDRA-5044:
-------------------------------------------

We only support resizing compaction threads and reader/writer pool size. Also, we added support
to change the number of cores in the yaml: https://issues.apache.org/jira/browse/CASSANDRA-4790.

We can't resize each pool independently using the yaml file; most of the thread pool sizes
seem fine -- main drivers for this change are the ones that are configurable in the yaml.
                
> Allow resizing of threadpools via JMX
> -------------------------------------
>
>                 Key: CASSANDRA-5044
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5044
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Carl Yeksigian
>            Assignee: Carl Yeksigian
>            Priority: Minor
>             Fix For: 1.2.1
>
>         Attachments: 5044.txt
>
>
> Currently changing the size of threadpools is done using the config files. If resizing
a threadpool, the node needs to be taken offline.
> Adding resizing via JMX allows online tweaking. TPEs allow for moving the number of threads
up and down; moving down will take effect after a thread in the pool becomes idle.

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