php-general Digest 17 May 2012 20:39:55 -0000 Issue 7815
Topics (messages 317879 through 317880):
Re: Performance / AB issue?
317879 by: Lars Nielsen
regexp novice
317880 by: Jim Giner
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----------------------------------------------------------------------
--- Begin Message ---
>
>> On Fri, May 11, 2012 at 9:53 AM, Camilo Sperberg <unrea...@gmail.com>
>> wrote:
>>>
>>>
>>> Sent from my iPhone 5 Beta [Confidential use only]
>>>
>>> On 11 mei 2012, at 07:09, "Lars Nielsen" <l...@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 <tijn...@gmail.com> wrote:
>>>>>>>
>>>>>>>> On Thu, May 10, 2012 at 9:04 AM, Lars Nielsen <l...@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
>>>>>> Â State
>>>>>> tcp     0    0 0.0.0.0:22        0.0.0.0:*
>>>>>> Â Â Â Â LISTEN
>>>>>> tcp     0    0 127.0.0.1:25       0.0.0.0:*
>>>>>> Â
>>>>>> Â Â Â LISTEN
>>>>>> tcp     0    0 127.0.0.1:3306      0.0.0.0:* Â
>>>>>> Â Â Â LISTEN
>>>>>> tcp     0    0 0.0.0.0:80        0.0.0.0:*
>>>>>> Â Â Â Â LISTEN
>>>>>> tcp     1    0 x.x.x.x:80     x.x.x.x:39237 Â
>>>>>> CLOSE_WAIT
>>>>>> tcp     1    0 x.x.x.x:80     x.x.x.x:39236 Â
>>>>>> Â CLOSE_WAIT
>>>>>> tcp     0    0 x.x.x.x:22     x.x.x.x:47383 Â
>>>>>> Â ESTABLISHED
>>>>>> tcp     0    0 127.0.0.1:80     Â
>>>>>> Â 127.0.0.1:34775
>>>>>> ESTABLISHED
>>>>>> tcp     1    0 x.x.x.x:80     x.x.x.x:39300 Â
>>>>>> Â 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 Â
>>>>>> Â ESTABLISHED
>>>>>> tcp6 Â Â Â 0 Â Â Â 0 :::22 Â Â Â Â Â Â Â Â Â :::*
>>>>>> LISTEN
>>>>>> tcp6 Â Â Â 0 Â Â Â 0 ::1:25 Â Â Â Â Â Â Â Â Â :::*
>>>>>> 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 : l...@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
>>>> Â 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?
>>>
>>
>> A firewall is not the case here. He's testing with -c 2 and is getting
>> errors, with -c 50 on a static file not. Also, blocking a DDOS attack
>> at only 50 connections is way too low, so I don't think that would
>> happen.
>>
>> - Matijn
>>
> Now i have the result of a test on localhost:
>
>
> ab -c 1 -n 20 http://localhost/
> This is ApacheBench, Version 2.3 <$Revision: 655654 $>
> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
> Licensed to The Apache Software Foundation, http://www.apache.org/
>
> Benchmarking localhost (be patient).....done
>
>
> Server Software: Apache/2.2.22
> Server Hostname: localhost
> Server Port: 80
>
> Document Path: /
> Document Length: 14463 bytes
>
> Concurrency Level: 1
> Time taken for tests: 3.540 seconds
> Complete requests: 20
> Failed requests: 0
> Write errors: 0
> Total transferred: 298480 bytes
> HTML transferred: 289260 bytes
> Requests per second: 5.65 [#/sec] (mean)
> Time per request: 177.020 [ms] (mean)
> Time per request: 177.020 [ms] (mean, across all concurrent
> requests)
> Transfer rate: 82.33 [Kbytes/sec] received
>
> Connection Times (ms)
> min mean[+/-sd] median max
> Connect: 0 0 0.0 0 0
> Processing: 175 177 2.1 176 182
> Waiting: 153 156 1.7 155 160
> Total: 175 177 2.1 176 182
>
> Percentage of the requests served within a certain time (ms)
> 50% 176
> 66% 177
> 75% 177
> 80% 178
> 90% 182
> 95% 182
> 98% 182
> 99% 182
> 100% 182 (longest request)
>
> xx@grafikom:/home/xx# ab -c 2 -n 20 http://localhost/
> This is ApacheBench, Version 2.3 <$Revision: 655654 $>
> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
> Licensed to The Apache Software Foundation, http://www.apache.org/
>
> Benchmarking localhost (be patient)...apr_poll: The timeout specified has
> expired (70007)
> Total of 3 requests completed
>
>
> Does this give any meaning?
>
>
> Med venlig hilsen
>
> LFWeb
> Lars Nielsen
>
>
> --
> PHP General Mailing List (http://www.php.net/)
> To unsubscribe, visit: http://www.php.net/unsub.php
>
>
Arghh!!!! :-S
Its an APC issue.... If I turn off php's apc it can handle multiple
connections! ... have to study apc!
Best regards / Med venlig hilsen
LFWeb
Lars Nielsen
--- End Message ---
--- Begin Message ---
ok - finally had to come up with my own regexp - and am failing.
Trying to validate an input of a time value in the format hh:mm, wherein
I'll accept anything like the following:
hmm
hhmm
h:mm
hh:mm
in a 12 hour format. My problem is my test is ok'ing an input of 1300.
Here is my test:
if (0 == preg_match("/([0][1-9]|[1][0-2]|[1-9]):[0-5][0-9]/",$t))
return true;
else
return false;
Can someone help me correct my regexp?
--- End Message ---
