Re: Performance / AB issue?

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>
>
> Sent from my iPhone 5 Beta [Confidential use only]
>
> On 10 mei 2012, at 17:40, Matijn Woudt <tijnema@xxxxxxxxx> wrote:
>
>> On Thu, May 10, 2012 at 9:04 AM, Lars Nielsen <lars@xxxxxxxx> wrote:
>>> Hi there,
>>>
>>> I have apache-2.22/php 5.3.10 set up on a dedicated server but I have a
>>> strange issue.
>>>
>>> I have made a Drupal 7 site with a mysql db.
>>>
>>> If I stress-test the site with : ab -c 1 -n 150 http://sitename/ it
>>> works
>>> fine.
>>> If I stress-test the site with : ab -c 2 -n 20 http://sitename/ it
>>> kills
>>> apache.
>>> If I stress-test the site with : ab -c 50 -n 1500
>>> http://sitename/static.html it works fine.
>>>
>>> I have set apache's errorlog to debug. But it writes nothing, either in
>>> the virtualhost or in the server-file.
>>>
>>> Can anyone give a hint about what can be wrong?
>>>
>>>
>>
>> What do you mean with 'kills apache', does it terminate apache or does
>> apache hang (eg. 100% cpu), and respond normal after the stress test
>> is over?
>> And what is the index of your site? A php script, or..? Do you have
>> ModRewrite redirects etc?
>>
>> - Matijn
>>
>> --
>> PHP General Mailing List (http://www.php.net/)
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>>
>
> Can you visit the site normally? Try less verbosing in apache, that is
> pretty intensive, but as you can benchmark a static file well (with
> moderate high settings), i assume it is some configuration problem in
> drupal.
>
> Greeting.
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>

Hi,

I can visit the site normaly, but with 2-3 concurrent ab test it fails.
seen from 'ps' and 'htop' it seems that both apache and mysql continues to
run normaly but it doesnt respond.

If i run netstat -an after the test it shows this :
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address  State
tcp        0      0 0.0.0.0:22              0.0.0.0:*        LISTEN
tcp        0      0 127.0.0.1:25            0.0.0.0:*        LISTEN
tcp        0      0 127.0.0.1:3306          0.0.0.0:*        LISTEN
tcp        0      0 0.0.0.0:80              0.0.0.0:*        LISTEN
tcp        1      0 x.x.x.x:80        x.x.x.x:39237   CLOSE_WAIT
tcp        1      0 x.x.x.x:80        x.x.x.x:39236    CLOSE_WAIT
tcp        0      0 x.x.x.x:22        x.x.x.x:47383    ESTABLISHED
tcp        0      0 127.0.0.1:80            127.0.0.1:34775        
ESTABLISHED
tcp        1      0 x.x.x.x:80        x.x.x.x:39300    CLOSE_WAIT 
ESTABLISHED
tcp        0      0 127.0.0.1:34775         127.0.0.1:80           
ESTABLISHED
tcp        0      0 x.x.x.x:80        x.x.x.x:39330    ESTABLISHED
tcp6       0      0 :::22                   :::*                    LISTEN
tcp6       0      0 ::1:25                  :::*                    LISTEN

So it does seem like there should be room for new tcp connections?

But if I restart apache then it works again... So I guess it is a
apache/php configuration issue?

-- 
Med venlig hilsen / Best Regards

LFWeb
Lars Nielsen
Thorsensvej 30
4800 Nykøbing Falster
Tlf: +45 20 64 85 76
email : lars@xxxxxxxx
www : http://www.lfweb.dk


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