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Re: WAL Optimisation - configuration and usage

From: Rob Fielding <rob(at)dsvr(dot)net>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: WAL Optimisation - configuration and usage
Date: 2004-02-29 13:08:01
Message-ID: 4041E430.7010109@dsvr.net (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-hackers-pitrpgsql-performance
Rod Taylor wrote:

>>random_page_cost = 0.5
>>    
>>
>
>Try a value of 2 for a while.
>
>  
>
OK thanks Richard and Rod. I've upped this to 2. I think I left this 
over from a previous play with setttings on my IDE RAID 0 workstation. 
It seemed to have a good effect being set as a low float so it stuck.

I've set it to 2.

 From another post off list, I've also bumped up

max_fsm_relations = 1000   # min 10, fsm
max_fsm_pages = 20000      # min 1000, fs
vacuum_mem = 32768          # min 1024

as they did seem a little low. I'm hesitant to set them too high at this 
stage as I'd prefer to keep as much RAM available for runtime at this time.

I'm still hoping that perhaps the uber-pgadmin Mr Lane might reply about 
my WAL issue :) however I'm getting the feeling now the server is 
running with a much higher level of performance than it has been. Won't 
know until tomorrow thought.

Cheers,

-- 
Rob Fielding
Development
Designer Servers Ltd


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