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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Too many MESSAGE-DESERIALIZER-POOL Thread
Date Fri, 02 Jul 2010 02:10:26 GMT
throttle your writes when they start timing out

(moved to user@, bcc dev@)

On Thu, Jul 1, 2010 at 9:08 PM, Peng Guo <gpcuster@gmail.com> wrote:
> Hi
>
> I am doing a test which 30 nodes.
>
> After I start 300 data insert process, I looked at the tpstats:
>
> [ dw-greenplum-4] Pool Name                    Active   Pending
> Completed
> [ dw-greenplum-4] FILEUTILS-DELETE-POOL             0         0
> 14
> [ dw-greenplum-4] STREAM-STAGE                      0         0
> 0
> [ dw-greenplum-4] RESPONSE-STAGE                    0         0
> 24
> [ dw-greenplum-4] ROW-READ-STAGE                    0         0
> 0
> [ dw-greenplum-4] MESSAGE-DESERIALIZER-POOL       512    709997
> 3829734
> [ dw-greenplum-4] GMFD                              0         0
> 1678
> [ dw-greenplum-4] CONSISTENCY-MANAGER               0         0
> 0
> [ dw-greenplum-4] ROW-MUTATION-STAGE              512      4606
> 4350906
> [ dw-greenplum-4] MESSAGE-STREAMING-POOL            0         0
> 0
> [ dw-greenplum-4] LOAD-BALANCER-STAGE               0         0
> 0
> [ dw-greenplum-4] FLUSH-SORTER-POOL                 0         0
> 0
> [ dw-greenplum-4] MEMTABLE-POST-FLUSHER             0         0
> 134
> [ dw-greenplum-4] FLUSH-WRITER-POOL                 0         0
> 134
> [ dw-greenplum-4] AE-SERVICE-STAGE                  0         0
> 1
> [ dw-greenplum-4] HINTED-HANDOFF-POOL               1        27
> 0
>
> How could I solve this problem?
>
> Thx.
>
> --
> Regards
>   Peng Guo
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com

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