From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | "Ravindra Guravannavar" <ravindrag(at)gmail(dot)com> |
Cc: | pgsql-admin(at)postgresql(dot)org |
Subject: | Re: clustering takes too long! |
Date: | 2006-06-22 15:40:08 |
Message-ID: | 209.1150990808@sss.pgh.pa.us |
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Lists: | pgsql-admin |
"Ravindra Guravannavar" <ravindrag(at)gmail(dot)com> writes:
> I am trying to cluster an index on the TPC-H lineitem table having
> 6 million records. The index is on a single column l_suppkey. Postgres
> (8.1.3) is not able to finish the operation even after 2 hours! The disk
> is being accessed continuously and CPU is at 2%. Postmaster is
> started with the following options:
> -B 2000 --work-mem=10240 --maintenance_work_mem=10240 --wal_buffers=32
> --checkpoint_segments=128 --checkpoint_timeout=600
You should increase maintenance_work_mem for large reindexing
operations. That shared_buffers setting is about a factor of 10 too
small too.
regards, tom lane
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