| From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
|---|---|
| To: | "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> |
| Cc: | "Scott Ribe" <scott_ribe(at)killerbytes(dot)com>, "Alan Hodgson" <ahodgson(at)simkin(dot)ca>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: In the belly of the beast (MySQLCon) |
| Date: | 2008-04-20 18:48:16 |
| Message-ID: | 20080420114816.42f779ab@commandprompt.com |
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| Lists: | pgsql-advocacy pgsql-general |
On Sun, 20 Apr 2008 11:32:58 -0600
"Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> wrote:
> Exactly. There are several things you can do on the replica that you
> wouldn't do on the master for better performance. Really big numbers
> of WAL segments, no background writer, fsync off as mentioned, WAL on
> a RAID-0 with 10 disks, no battery back on a caching RAID controller,
> and so on.
You are still limited by how fast you can pull data from the master
over the network to the slave. Which when dealing with 500GB+ is a
significant limitation.
Joshua D. Drake
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