Our average CPU is very low definitely running in the 2-3% range. RAM
utilization is also very low and i/o is low as well. Our staging machines
run their base config and do have sporadic problems with I/O errors and CPU
utilization under heavy loads. We also interface through an ASP custom web
messaging application (not Imail templates).
In the end it just came out that the price for the extra RAM and a slightly
faster machine outweighed the possibility of experiencing any problems. We
operate like a NOC in that when we hit a capacity threshold we will add a
new machine or hardware to existing machines to ensure our users have the
best experience when using the system.
JK
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Len Conrad
Sent: Friday, August 25, 2000 1:07 AM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] Hardware Sizing
>We run around 60K users per server (one dual CPU 500mhz with 512MB of RAM
>and lots of disk space) and have had zero problems. We have handled over
>300K messages in the last month with no difficulties. It is supposed to
>scale to 150K users per machine with no problems.
But what's your avg CPU, RAM, and disk i/o utilization (not disk
space)? I bet under 10%, maybe under 5%. ie, with a machine 25% as
powerful, you'd be comfortable.
>The spec they gave me on the phone was 256MB RAM/ single Pentium Pro but I
>figured that was a bit weak.
You figured wrong, but what the heck, wasting lotsa of money is fun! vbg
The only report I've ever seen here about being underpowered was a
guy recently with just 20,000 web-messaging-only users and he was
hurting with a fairly powerful machine. That's not an "mail"
problem, it's an HTTP web server pb. One needs to consider the vast
increase in resources that web msging require vs POP/SMTP access, to
say nothing the stability of web messaging, and the increased user
support (attachment pbs, 12-min time-out pb's, HTML template
maintenance per version upgrade and per domain, etc, etc).
Len
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