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Re: go for a script! / ex: PostgreSQL vs. MySQL - Mailing list pgsql-performance

From Christopher Kings-Lynne
Subject Re: go for a script! / ex: PostgreSQL vs. MySQL
Date
Msg-id 3F87932B.4050507@familyhealth.com.au
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In response to Re: go for a script! / ex: PostgreSQL vs. MySQL  (Vivek Khera <khera@kcilink.com>)
Responses Re: go for a script! / ex: PostgreSQL vs. MySQL  (Sean Chittenden <sean@chittenden.org>)
List pgsql-performance
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> NB> shared_buffers = 1/16th of total memory
> NB> effective_cache_size = 80% of the supposed kernel cache.

I think Sean(?) mentioned this one for FreeBSD (Bash code):

echo "effective_cache_size = $((`sysctl -n vfs.hibufspace` / 8192))"

I've used it for my dedicated servers.  Is this calculation correct?

Chris

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