Re: Maximum Possible Insert Performance? - Mailing list pgsql-performance

From Shridhar Daithankar
Subject Re: Maximum Possible Insert Performance?
Date
Msg-id 3FC2F17A.5050307@persistent.co.in
Whole thread Raw
In response to Re: Maximum Possible Insert Performance?  (William Yu <wyu@talisys.com>)
Responses Re: Maximum Possible Insert Performance?  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-performance
William Yu wrote:

> This is an intriguing thought which leads me to think about a similar
> solution for even a production server and that's a solid state drive for
> just the WAL. What's the max disk space the WAL would ever take up?
> There's quite a few 512MB/1GB/2GB solid state drives available now in
> the ~$200-$500 range and if you never hit those limits...

Maximum number of WAL segments at any time in 2*(number of checkpoint
segments)+1 IIRC.

So if you have 3 checkpoint segments, you can not have more than 7 WAL segments
at any time. Give or take 1.

Correct me if I am wrong..

  Shridhar


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