Requesting real-world stats, please

[Audun Ytterdal]

Most people have directors with several identical backends. I've got
it the other way around: Several standalone apache, lighty and nginx
bokses serving different stuff according to host and url.

This particular varnishbox is a HP Proliant BL460c G1 2XDualcore 2.66
Ghz with 6 GB of RAM.
Running Centos5.3. Only tuning is /var/lib/varnish on tmpfs

The most active backend is a vmware-image running apache and 2GB of RAM.
ServerLimit      256
MaxClients       256
MaxRequestsPerChild  4000

Serving approx 25-50 hits/sec

On Wed, May 26, 2010 at 11:22 AM, Angie T. Muhammad
<angie.tawfik at gmail.com> wrote:
> Adun, may I ask about apache's configuration running behind this varnish
> installation and HW specs too if you don't mind ?
> Thank you :)
>
> On Wed, May 26, 2010 at 1:18 AM, Audun Ytterdal <audun at ytterdal.net> wrote:
>>
>> On Tue, May 25, 2010 at 2:28 PM, Poul-Henning Kamp <phk at phk.freebsd.dk>
>> wrote:
>> >
>> > I may have "misunderestimated" the dynamics of how objects live in
>> > Varnish caches and thus taken a wrong optimization decision with
>> > the critbit hasher.
>> >
>> > I am looking for data to figure this out, specifically the values of
>> > the two varnishstat counters:
>> >
>> >        "N struct objecthead."
>> > and
>> >        "N struct object"
>> >
>> > Along with information about which version of varnish, and which, if
>> > any -h argument you use.
>>
>> One varnish doing about 4320 million req/day, peaks at 8K reqs/s
>>
>> [root at dexter ~]# rpm -qa |grep varnish
>> varnish-2.1.0-2.vg
>> varnish-libs-2.1.0-2.vg
>>
>> [root at dexter ~]# ps axu |grep varnish
>> varnish   1239 54.8 74.1 14895928 4526520 ?    Sl   May24 1053:21
>> /usr/sbin/varnishd -P /var/run/varnish.pid -a :80 -f
>> /etc/varnish/vg.vcl -T 127.0.0.1:82 -t 600 -u varnish -g varnish -p
>> thread_pool_add_delay 5 -p thread_pool_timeout 120 -p thread_pools 4
>> -w 200,3000,120 -s malloc,5G
>>
>> [root at dexter ~]# varnishstat -1 -f n_object,n_objecthead
>> n_object               129723          .   N struct object
>> n_objecthead           163562          .   N struct objecthead
>>

-- 
Audun Ytterdal
http://audun.ytterdal.net