[ale] dumb apache/memory question

[C I]

First I am by far from an apache/memory expert, but I
do think that free gives you a better picture of your
memory usage.  The idea is that linux caches memory
for later use(experts feel to correct this).  You will
want to read up on free's output to understand what is
telling you.  But I had a similar situation where I
looked at top and freaked out at my memory usage.  But
after checking free things made more sense.  No real
help but my couple of pennies.

CI


--- djinn <djinn at djinnspace.com> wrote:
> Background on dumb question:  sar -r is consistantly
> showing me at 95 -
> 98% memory usage, top is showing httpd and stunnel
> at..uh..the top but
> I'm running at 85 - 95% idle on CPU utilization. 
> Obviously, I'm doing
> something that's way RAM intensive...
> 
> This machine is running apache 1.3.20 + modssl + php
> 4.0.6 and all the
> database connections go over stunnel.  That's all
> it's doing.  But the
> most heavily hit pages are not static...most of our
> stuff relies on PHP
> which is, I'm assuming, the cause of the memory
> hoggage (I know stunnel
> is contributing as well).  
> 
> So here's my dumb question: do I need to throw RAM
> at this (I've got
> 512MB) or do I need to tune my setup?  Or both?  I'm
> beginning to
> believe that my web page lag is due to my web server
> and not so much my
> firewalls...firewalls are just idling away with tons
> of processor and
> RAM free even at peak traffic time.  Even if it's
> not the direct cause
> of the slowness, it would seem that 98% RAM
> utilization would be a thing
> to worry about.
> 
> TIA, as always
> jenn
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