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Re: Initial queries of day slow - Mailing list pgsql-general

From Atri Sharma
Subject Re: Initial queries of day slow
Date
Msg-id CAOeZVidDbpdpOqtZ2-+5c+R0gxxeEgxh58MJh=M=f+Lo_U5-sA@mail.gmail.com
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In response to Initial queries of day slow  (Rebecca Clarke <r.clarke83@gmail.com>)
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On Mon, Apr 7, 2014 at 3:02 PM, Rebecca Clarke <r.clarke83@gmail.com> wrote:
Hi all.

I'm a bit stumped. At present I'm finding that queries to my database, that normally execute promptly, are taking a long time when they are executed first thing in the morning (after the database has been inactive for several hours). After the first execution, everything is back to normal. 

A while back I turned autovacuum off and now instead I run a daily cron at 3am that executes a script which does a VACUUM ANALYZE on each table. 

These are my details:

Debian GNU/Linux 6.0
Postgresql 9.1
Memory 4GB

shared_buffers = 1024MB
work_mem = 16MB 
maintenance_work_mem = 128MB 
effective_cache_size = 2048MB



Could it be cold cache behaviour?



--
Regards,
 
Atri
l'apprenant

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