[If this is the wrong forum for this, please let me know]
I'm running SquirrelMail in production for a mid-sized University (30,000+
students, staff, & faculty, <number> of simultaneous connections) and I'm
trying to get a sense of the hardware requirements. What we're currently
seeing is that SquirrelMail via Apache chews up available memory very
quickly (95% within two hours or so), and then creeps towards 100% until
it consumes all memory and swap space. CPU utilization stays low (5-30%
used) and the load rarely cracks 1 during the entire time. On average
we're seeing 60-80 simultaneous connections at any given time.
One of our administrators thinks there's a memory leak somewhere
(Potentially under Solaris itself) and thinks that the Apache directive
MaxRequestsPerChild will help if it's set to something around 1000 or so.
Not being an Apache expert myself, I don't know. Has anyone played with
this setting and seen any results?
For those people who are running with a similar sized user
base/simultaneous connection load, what are you using for hardware and IYO
is what we have below seem reasonable?
For everyone out there, have you seen such a massive use of memory from
the start of your web server and a slow consumption of memory until it's
all utilized? What tweaks did you do to the stock Apache httpd.conf to
keep memory usage under control?
Thanks for your help and input.
Lee
Here's the hardware (Dedicated machine running only SquirrelMail):
Sun E420R, 4x450Mhz cpus, 4GB of memory, running Solaris8
Here's the setup:
SquirrelMail v1.2.11
PHP 4.2.3 w/LDAP and Java support enabled
Apache 1.3.27 vanilla install
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