| From: | Scott Ribe <scott_ribe(at)killerbytes(dot)com> |
|---|---|
| To: | <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: how can i use SELECT to find a substring of a |
| Date: | 2003-09-13 20:40:37 |
| Message-ID: | BB88DCE5.32DA2%scott_ribe@killerbytes.com |
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| Thread: | |
| Lists: | pgsql-general |
>> 7.) how many users can a mac OS X system support at one time while
>> maintaining decent/good performance? does postgreSQL have a limit for
>> mac servers? i've read that windows has a limit of only about 50
>> simultaneous users. i have a fast G4 and if i have to will buy a G5 i
>> suspect i'll need to support 200 simultaneous users that are actively
>> file swapping. can a G4/G5 handle that?
>
> You'll really need to run some tests. If there are lots of updates your
> biggest problem will be disk I/O - plenty of fast SCSI disks and a raid
> controller with battery-backed write cache will help there. The performance
> list is the place to get more details.
> If you do lots of reading but few updates, then plenty of RAM is good.
Restrictions in the Mac OS X implementation of shmget limit Postgres to 2MB
of shared buffers. This could be a problem for large databases and/or heavy
activity.
--
Scott Ribe
scott_ribe(at)killerbytes(dot)com
http://www.killerbytes.com/
(303) 665-7007 voice
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