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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-599) The pending tasks listed for the compaction pool is confusing
Date Wed, 23 Dec 2009 16:12:29 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-599:
-------------------------------------

    Attachment:     (was: 0001-clean-up-compactions-api-and-move-into-CompactionManag.txt)

> The pending tasks listed for the compaction pool is confusing
> -------------------------------------------------------------
>
>                 Key: CASSANDRA-599
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-599
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>         Environment: RHEL 4
>            Reporter: Tim Freeman
>            Assignee: Jonathan Ellis
>            Priority: Trivial
>             Fix For: 0.9
>
>         Attachments: 0002-abstract-DTPE-from-JMXETPE.txt, 0003-expose-cf-count-disk-space-to-JMX.txt,
0004-move-initial-check-for-compaction-to-after-log-replay.txt, 0005-make-estimation-of-pendingtasks-for-CompactionManager-.txt
>
>
> Using the build dated 29 Nov 09, the output from "nodeprobe tpstats" is confusing.  The
following observations were made with an idle server that was compacting to clean up after
some writes that were done in the past.  The number of pending tasks for COMPACTION-POOL starts
at 1673, and after doing some work the number of pending tasks has increased to 1675.  I'd
prefer that the amount of pending work reported by tpstats decreases as work is done.
> > sh nodeprobe.sh tpstats
> Pool Name                    Active   Pending      Completed
> FILEUTILS-DELETE-POOL             0         0            872
> MESSAGING-SERVICE-POOL            0         0              0
> STREAM-STAGE                      0         0              0
> RESPONSE-STAGE                    0         0         662309
> ROW-READ-STAGE                    0         0         662309
> LB-OPERATIONS                     0         0              0
> COMMITLOG                         1         0        1189659
> MESSAGE-DESERIALIZER-POOL         0         0              0
> GMFD                              0         0              0
> LB-TARGET                         0         0              0
> CONSISTENCY-MANAGER               0         0              0
> ROW-MUTATION-STAGE                0         0        1101916
> MESSAGE-STREAMING-POOL            0         0              0
> LOAD-BALANCER-STAGE               0         0              0
> FLUSH-SORTER-POOL                 0         0           1723
> MEMTABLE-POST-FLUSHER             0         0           1723
> COMPACTION-POOL                   1      1673            136
> FLUSH-WRITER-POOL                 0         0           1723
> HINTED-HANDOFF-POOL               0         0             20
> > sh nodeprobe.sh tpstats
> Pool Name                    Active   Pending      Completed
> FILEUTILS-DELETE-POOL             0         0            872
> MESSAGING-SERVICE-POOL            0         0              0
> STREAM-STAGE                      0         0              0
> RESPONSE-STAGE                    0         0         662309
> ROW-READ-STAGE                    0         0         662309
> LB-OPERATIONS                     0         0              0
> COMMITLOG                         1         0        1191173
> MESSAGE-DESERIALIZER-POOL         0         0              0
> GMFD                              0         0              0
> LB-TARGET                         0         0              0
> CONSISTENCY-MANAGER               0         0              0
> ROW-MUTATION-STAGE                0         0        1101916
> MESSAGE-STREAMING-POOL            0         0              0
> LOAD-BALANCER-STAGE               0         0              0
> FLUSH-SORTER-POOL                 0         0           1723
> MEMTABLE-POST-FLUSHER             0         0           1723
> COMPACTION-POOL                   1      1675            139
> FLUSH-WRITER-POOL                 0         0           1723
> HINTED-HANDOFF-POOL               0         0             20
> (^[[01;32mroot@localhost^[[00m)^[[01;34m~/rackspace-stuff/cassandra-0.5-pre^[[00m>


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