On Tuesday, September 10, 2013 1:51:56 PM UTC-7, Christian Hammond wrote:
> Hi Steve,
> You shouldn't need to clear the cache. Something is wrong, though. We know
> of servers reliably handling thousands if users every day.
> How much memory have you given memcached?
We're using the default settings, which allow 1024 connections and
allocates 64MB of memory. I didn't realize until just now that it was only
using 64MB of memory. I'm going to bump that to 2GB
> What are the specs of the server?
Intel(R) Xeon(R) CPU 5160 @ 3.00GHz with 16 GB RAM
> What kind of repositories are you using?
> Are there any gigantic, multi-megabyte files it's working with (diffs or
> in the repository)?
I can't say off hand - I'd have to check that. We do sometimes get people
trying to post reviews with large numbers of files. We've discouraged that
but haven't stopped it completely.
> Can you show the Apache limits in your config?
I will need your help finding that information. Are you just asking for
the main apache conf file? Or the rb conf file?
Hopefully, bumping the memory on memcached will resolve this.
> Any other info you can provide about your setup would help.
> On Tuesday, September 10, 2013, Steve wrote:
>> It just happened again. I had to restart apache twice. At one point I
>> saw 135 apache processes running. And heavy traffic that I think is coming
>> from memcache, but I'm not sure. Maybe I need to clear the cache?
>> On Tuesday, September 10, 2013 8:09:39 AM UTC-7, Steve wrote:
>>> I know this is a shot in the dark, but I was hoping people with more
>>> apache experience and better knowledge of RB might be able to give me some
>>> pointers. We're running RB 1.7.12 on a Centos6 box on a very beefy machine
>>> which is dedicated to RB. We're using MySQL and perforce and have close to
>>> 900 users. About twice a week (sometimes more) the load average on the
>>> server spikes into the hundreds and the server becomes unresponsive. The
>>> only recourse is to stop apache, wait for the load average to come down and
>>> then restart. Sometimes when we restart, it spikes again immediately so we
>>> typically pause for a bit and let the load average get down under 1 before
>>> restarting. When this happens, it looks like there a way more apache
>>> processes running than there should be. We're using the default settings
>>> for apache on linux, which I believe limits the number of connections. It
>>> also looks like there's a lot of traffic going from apache to memcache,
>>> which is running on the same machine.
>>> I know this is not much to go on, but I was hoping someone who has
>>> experience with fine-tuning RB on a linux server might give me some
>>> pointers as to where to begin.
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