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https://issues.apache.org/jira/browse/CASSANDRA-599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12794089#action_12794089
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Jonathan Ellis commented on CASSANDRA-599:
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rebased
> 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:
> 0001-clean-up-compactions-api-and-move-into-CompactionManag.txt,
> 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;32mr...@localhost^[[00m)^[[01;34m~/rackspace-stuff/cassandra-0.5-pre^[[00m>
>
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