Re: Performance / AB issue?

Sent from my iPhone 5 Beta [Confidential use only] On 11 mei 2012, at 07:09, "Lars Nielsen" <lars@lfweb.dk> wrote: > >> >> 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@gmail.com> wrote: >>>> >>>>> On Thu, May 10, 2012 at 9:04 AM, Lars Nielsen <lars@lfweb.dk> 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@lfweb.dk >>> 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 > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > Have you tried benchmarking from localhost? Do you have any active firewall? Selinux? Shorewall? Anything that could block a ddos attack? Greetings.