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From "Sammy Yu (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-482) Expose out additional metrics for the thread pools: active threads, pool size, and completed tasks
Date Thu, 08 Oct 2009 20:51:31 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sammy Yu updated CASSANDRA-482:
-------------------------------

    Attachment: 0001--CASSANDRA-482-Expose-out-additional-metrics-for-th.patch

The new output of tpstats (disregard the spacing):
Pool Name                    Active      Size   Pending      Completed
MESSAGING-SERVICE-POOL            0         4         0              0
FILEUTILS-DELETE-POOL             0         1         0              0
RESPONSE-STAGE                    0         4         0              0
BOOT-STRAPPER                     0         1         0              0
ROW-READ-STAGE                    0         8         0              0
LB-OPERATIONS                     0         1         0              0
COMMITLOG                         1         1         0            344
GMFD                              0         1         0              0
MESSAGE-DESERIALIZER-POOL         0         4         0              0
LB-TARGET                         0         1         0              0
CONSISTENCY-MANAGER               0         4         0              0
ROW-MUTATION-STAGE                0        32         0              0
MESSAGE-STREAMING-POOL            0         1         0              0
LOAD-BALANCER-STAGE               0         1         0              0
FLUSH-SORTER-POOL                 0         1         0              0
MEMTABLE-POST-FLUSHER             0         1         0              0
COMPACTION-POOL                   0         1         0              4
FLUSH-WRITER-POOL                 0         2         0              0
HINTED-HANDOFF-POOL               0         1         0              0


The CommitLogExecutorService mapping hacks probably need to be looked at.


> Expose out additional metrics for the thread pools: active threads, pool size, and completed
tasks
> --------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-482
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-482
>             Project: Cassandra
>          Issue Type: New Feature
>    Affects Versions: 0.5
>            Reporter: Sammy Yu
>            Assignee: Sammy Yu
>         Attachments: 0001--CASSANDRA-482-Expose-out-additional-metrics-for-th.patch
>
>
> It would be nice to expose out additional metrics in the threadpools via nodeprobe's
tpstats to understand how busy the system is.

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