Re: Performance / AB issue?

> > 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