Re: Performance / AB issue?

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>
> On 10 mei 2012, at 23:26, Lars Nielsen wrote:
>
>>
>>>
>>>
>>> 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/)
>>>> To unsubscribe, visit: http://www.php.net/unsub.php
>>>>
>>>
>>> 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
>>
>>
>> --
>> PHP General Mailing List (http://www.php.net/)
>> To unsubscribe, visit: http://www.php.net/unsub.php
>>
>
> Have you tried benchmarking a really simple php page, such as
>
> <?php echo 'hello world'; ?>
>
> ?
>
> It that works, than it is definitely an issue in Drupal's configuration
> and not in PHP/Apache. Additionally, you could check what happens when you
> try to establish a session or make a database call to rule out those as
> well, just make really simple tests that you know wouldn't fail and run ab
> on them.
>
> Greetings.
>
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>
Thanks!

Now I have made
<?php
  echo "Hey from PHP!";
?>

It runs fine from a little concurrency. But with "-c 5 -n 500" it fails
after 308 requests!



Best Regards / Med venlig hilsen

LFWeb
Lars Nielsen


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