On Jun 24, 2008, at 9:12 PM, jay wrote:
I've a table with about 34601755 rows ,when I execute 'update
msg_table set
type=0;' is very very slow, cost several hours, but still not
complete?
Why postgresql is so slowly? Is the PG MVCC problem?
But I try it on Mysql, the same table and rows, it only cost about 340
seconds.
Any idea for the problem?
My machine config:
Memory 8G, 8 piece 15K disk , 2CPU(Quad-Core) AMD
OS: Red Hat AS4
My postgres.conf main parameter is following:
Hi Jay,
Is the "type" used in an index? Have you properly increased your
number of checkpoint segments? Any warnings in in your log file about
excessive checkpointing?
Cheers,
Rusty
--
Rusty Conover
InfoGears Inc.
http://www.infogears.com
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