On 03/17/2011 09:25 AM, Michael Andreasen wrote:
Hi,
I've been looking around for information on doing a pg_restore as fast as
possible. It is for a backup machine so I am not interested in anything like
crash recovery or anything else that would impact speed of load. I just want to
go from no database to database there as fast as possible. The server is for
postgresql only and this is the only database, sp both system at postgres can
be set however is required for the fast load.
Currently I am using a twin processor box with 2GB of memory and raid 5 disk.
I start postgres before my load with these settings, which have been suggested.
shared_buffers = 496MB
maintenance_work_mem = 160MB
checkpoint_segments = 30
autovacuum = false
full_page_writes=false
maintenance_work_mem and checkpoint_segments were advised to be increased, which I have
done, but these are just guess values as I couldn't see any advise for values, other than
"bigger".
I restore like this;
pg_restore -Fc -j 4 -i -O -d my_db my_db_dump.tbz
Even as this, it is still slower than I would like.
Can someone suggest some optimal settings (for postgresql 9) that will get this
as quick as it can be?
Thanks.
autovacuum = off
fsync = off
synchronous_commit = off
full_page_writes = off
bgwriter_lru_maxpages = 0
-Andy
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