Re: LAMP Server Performance Advice / Job Offer

Do the Apache, MySQL, or syslog have anything unusual?
Did sysstat have anything new since you last ran it?
Is the VM getting the RAM it's supposed to?

On Fri, Jan 18, 2013 at 04:29:32PM -0600, J. Wade Michaelis wrote:
> I work for a consulting / hosting firm in Topeka, and I have a
> server that is periodically crashing.  The last couple of times, it
> appears to have been due to the server running out of memory.  It is
> a virtual server (on VMware ESX), so I increased the RAM from 2GB to
> 4GB and the virtual CPUs from 1x single-core to 2x quad-cores.
> However, it may be a week or more before I can tell if this has
> resolved the issue.
> 
> What I am looking for is advice on how to track down the cause
> definitively, and prevent it from occurring again.  (My client is
> complaining about the downtime.)  When this occurred last time (~ a
> week ago), I installed sysstat to try and track the performance, but
> when I went to look at today's report, I got a message saying:
> "Invalid system activity file".  Viewing yesterday's report works
> just fine, so I'm thinking that the hard-reset I performed this
> morning F'd up the report.
> 
> We would be willing to pay the right person for their expertise, and
> I hope to learn something in the process.  I'm fairly knowledgeable,
> but I think I may be in over my head on this one.
> 
> The OS is CentOS 6.3, and it is dedicated to a single website
> running the Magento e-commerce software, which relies heavily on
> MySQL.  Any advice or assistance would be appreciated.
> 
> Thanks in advance,
> ~ j.
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