Re: choosing the right platform

Jim C. Nasby <jim@nasby.net>

From: "Jim C. Nasby" <jim@nasby.net>
To: "scott.marlowe" <scott.marlowe@ihs.com>
Cc: Matthew Nuzum <cobalt@bearfruit.org>, Pgsql-Performance <pgsql-performance@postgresql.org>
Date: 2003-04-22T08:30:58Z
Lists: pgsql-performance
On Thu, Apr 10, 2003 at 10:42:35AM -0600, scott.marlowe wrote:
> The difference between SIZE and SHARE is the delta, which is only 
> something like 3 or 4 megs for the initial select * from logs, but the 
> second one is only 1 meg.  On average, the actual increase in memory usage 
> for postgresql isn't that great, usually about 1 meg.
> 
> Running out of memory isn't really a problem with connections<=200 and 1 
> gig of ram, as long as sort_mem isn't too high.  I/O contention is the 
> killer at that point, as is CPU load.
 
Except you should consider what you could be doing with that 200M, ie:
caching data. Even something as small as 1M per connection starts to add
up.
-- 
Jim C. Nasby (aka Decibel!)                    jim@nasby.net
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