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Posted to users@httpd.apache.org by Rashmi Srinivasan <ra...@gmail.com> on 2016/09/22 04:32:25 UTC
[users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open files (24)
Hi,
Below is the issue encountered when i am trying to use apache 2.4 to
validate performance using the benchmarking tool(ab tool).
ab is invoked with 2000/1000 concurrent requests and subjected to 80000 cgi
requests. The module enabled is mod_cgid. Occurs with worker/event mpm
enabled
MPM configuration is:
<IfModule mpm_worker_module>
ServerLimit 80
StartServers 3
MinSpareThreads 75
MaxSpareThreads 250
ThreadsPerChild 25
MaxRequestWorkers 2000
MaxConnectionsPerChild 0
</IfModule>
================================================
2000 concurrent requests
Benchmarking x.x.x.x (be patient)
socket: Too many open files (24)
OR
1000 concurrent requests
Benchmarking x.x.x.x (be patient)
Completed 8000 requests
apr_socket_recv: Connection timed out (110)
Total of 8972 requests completed
================================================
This occurs on RHEL as well as on HP-UX.
Please help if anyone has encountered the same problem.
Thanks,
RS
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rubén Toribio Aldeguer <rt...@riu.com>.
25 * 2000 = 50.000 threads. May be you have to setup ulimit in your OS.
B.R.
2016-09-22 6:32 GMT+02:00 Rashmi Srinivasan <ra...@gmail.com>
:
> Hi,
> Below is the issue encountered when i am trying to use apache 2.4 to
> validate performance using the benchmarking tool(ab tool).
>
> ab is invoked with 2000/1000 concurrent requests and subjected to 80000
> cgi requests. The module enabled is mod_cgid. Occurs with worker/event mpm
> enabled
>
> MPM configuration is:
> <IfModule mpm_worker_module>
> ServerLimit 80
> StartServers 3
> MinSpareThreads 75
> MaxSpareThreads 250
> ThreadsPerChild 25
> MaxRequestWorkers 2000
> MaxConnectionsPerChild 0
> </IfModule>
>
> ================================================
> 2000 concurrent requests
>
> Benchmarking x.x.x.x (be patient)
> socket: Too many open files (24)
>
> OR
>
> 1000 concurrent requests
>
> Benchmarking x.x.x.x (be patient)
> Completed 8000 requests
> apr_socket_recv: Connection timed out (110)
> Total of 8972 requests completed
> ================================================
>
> This occurs on RHEL as well as on HP-UX.
> Please help if anyone has encountered the same problem.
>
>
> Thanks,
> RS
>
--
*Rubén Toribio Aldeguer*
Técnico Sistemas DataCenter
Informática Área Sistemas
(+34) 971743030
www.riu.com / www.riuplaza.com
--
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Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rashmi Srinivasan <ra...@gmail.com>.
Thanks
I will check this.
I have another concern related to performance.
on RHEL machine, running ab for 20000 requests with 100 concurrent requests
takes almost 46 seconds, while this was taking just 2 seconds in 2.2
Please can you tell if this is the case and how can this be improved?
Thanks
On Sat, Sep 24, 2016 at 1:02 AM, Stormy <st...@stormy.ca> wrote:
> At 12:18 AM 9/24/2016 +0530, Rashmi Srinivasan wrote:
>
>> Hi,
>>
>> This is the output of ulimit -aÂ
>>
> [snip]
>
>> max user processes        (-u) 1024
>>
>
> Pure guesswork, but this looks low -- on a 32bit system, try 2^15; on
> 64bits, 2^16 ... or more ...
>
> P.
>
> virtual memory      (kbytes, -v) unlimited
>> file locks            (-x) unlimited
>>
>> Thanks,
>>
>> On Fri, Sep 23, 2016 at 8:25 PM, Rubén Toribio Aldeguer <
>> rtoribio@riu.com> wrote:
>> I think your problem is not Apache, but your OS.
>> I think Apache 2.2 and 4.4 uses diferent mpm mode (my memory is poor).
>> I think you OS is limiting the number of Opens Files that can Manage.
>> (safety reasons)
>> Please, can you print you ulimit output, as I advise on a previous mail?
>>
>> Thanks.
>>
>> 2016-09-23 11:55 GMT+02:00 Rashmi Srinivasan <
>> rashmisrinivasan2007@gmail.com>:
>> Hi,
>> Do you feel this is the issue with some configuration or would this be an
>> issue with apache itself.
>> Has anybody encountered a performance issue of this kind.
>> Please comment
>>
>> Thanks,
>> RS
>>
>> On Fri, Sep 23, 2016 at 1:43 PM, Rashmi Srinivasan <
>> rashmisrinivasan2007@gmail.com> wrote:
>> Is there a minimum requirement for apache 2.4 to run these tests?
>> I have tried on different machines with different configurations with the
>> same outcome.
>> Please advise.
>>
>> Thanks,
>> RS
>>
>> On Fri, Sep 23, 2016 at 1:14 AM, Rashmi Srinivasan <
>> rashmisrinivasan2007@gmail.com> wrote:
>> Hi,
>> Thanks for checking this,
>>
>> I wanted to check the below:'
>> Â Â Â Â Stress testing of apache 2.2 works very well with the default
>> mpm worker onfiguration
>> Â Â Â Â However, apache 2.4 doesnt work at all with the default
>> configuration, gives the error:
>> Â Â Â Â Â 2000 concurrent requests
>> Â Â Â Benchmarking x.x.x.x (be patient)
>> Â Â Â socket: Too many open files (24)
>>
>> After changing the configuration, as described in the previous email, it
>> starts processing them:
>> Lots of timeouts are occurring.
>> Error in the error_lo is:
>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â "AH00046: child process still
>> did not exit, sending a SIGKILL"
>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â (2)No such file or directory:
>> [client x.x.x.c] AH01256: connect #7 to cgi daemon failed, sleeping before
>> retry
>> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 11)Resource temporarily
>> unavailable: AH01252: couldn't create child process: 11:
>> I also noticed that the CPU utilzation reached 99.9%
>> Which is when apache terminates
>>
>> What changes are to be done in this case.
>> Please advise
>>
>> Thanks,
>> RS
>> Â
>>
>> On Thu, Sep 22, 2016 at 9:54 PM, Yann Ylavic <yl...@gmail.com>
>> wrote:
>> On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
>> <ra...@gmail.com> wrote:
>> >
>> > Access log has the following status:
>> >Â [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200 16
>>
>> What's in the *error* log (path from the ErrorLog directive)?
>> What about resources (CPU, load average, ...) on the httpd machine
>> during the stress?
>>
>> Regards,
>> Yann.
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>> For additional commands, e-mail: users-help@httpd.apache.org
>>
>>
>>
>>
>>
>>
>>
>> --
>>
>> Rubén Toribio Aldeguer
>> Técnico Sistemas DataCenter
>> Informática à rea Sistemas
>> (+34) 971743030
>> www.riu.com / www.riuplaza.com
>>
>> Â Â Â Â Â Â Â Â Â Â Â
>> Â
>>
>> This e-mail and its attachments, if any, are confidential and may be
>> legally privileged. If you have received it in error, you are on notice of
>> this status. Please do not copy or use it for any other purpose or disclose
>> its contents to any other person: to do so could be a breach of confidence.
>> You may contact us at +34 971 74 30 30 or at sender's e-mail address.
>> Â Please, consider the environment before printing this email.
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many
open files (24)
Posted by Stormy <st...@stormy.ca>.
At 12:18 AM 9/24/2016 +0530, Rashmi Srinivasan wrote:
>Hi,
>
>This is the output of ulimit -aÂ
[snip]
>max user processes        (-u) 1024
Pure guesswork, but this looks low -- on a 32bit system, try 2^15; on
64bits, 2^16 ... or more ...
P.
>virtual memory      (kbytes, -v) unlimited
>file locks            (-x) unlimited
>
>Thanks,
>
>On Fri, Sep 23, 2016 at 8:25 PM, Rubén Toribio Aldeguer
><rt...@riu.com> wrote:
>I think your problem is not Apache, but your OS.
>I think Apache 2.2 and 4.4 uses diferent mpm mode (my memory is poor).
>I think you OS is limiting the number of Opens Files that can Manage.
>(safety reasons)
>Please, can you print you ulimit output, as I advise on a previous mail?
>
>Thanks.
>
>2016-09-23 11:55 GMT+02:00 Rashmi Srinivasan <ra...@gmail.com>:
>Hi,
>Do you feel this is the issue with some configuration or would this be an
>issue with apache itself.
>Has anybody encountered a performance issue of this kind.
>Please comment
>
>Thanks,
>RS
>
>On Fri, Sep 23, 2016 at 1:43 PM, Rashmi Srinivasan
><ra...@gmail.com> wrote:
>Is there a minimum requirement for apache 2.4 to run these tests?
>I have tried on different machines with different configurations with the
>same outcome.
>Please advise.
>
>Thanks,
>RS
>
>On Fri, Sep 23, 2016 at 1:14 AM, Rashmi Srinivasan
><ra...@gmail.com> wrote:
>Hi,
>Thanks for checking this,
>
>I wanted to check the below:'
>Â Â Â Â Stress testing of apache 2.2 works very well with the default
>mpm worker onfiguration
>Â Â Â Â However, apache 2.4 doesnt work at all with the default
>configuration, gives the error:
>Â Â Â Â Â 2000 concurrent requests
>Â Â Â Benchmarking x.x.x.x (be patient)
>Â Â Â socket: Too many open files (24)
>
>After changing the configuration, as described in the previous email, it
>starts processing them:
>Lots of timeouts are occurring.
>Error in the error_lo is:
>Â Â Â Â Â Â Â Â Â Â Â Â Â Â "AH00046: child process still did
>not exit, sending a SIGKILL"
>Â Â Â Â Â Â Â Â Â Â Â Â Â Â (2)No such file or directory:
>[client x.x.x.c] AH01256: connect #7 to cgi daemon failed, sleeping before
>retry
>Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 11)Resource temporarily
>unavailable: AH01252: couldn't create child process: 11:
>I also noticed that the CPU utilzation reached 99.9%
>Which is when apache terminates
>
>What changes are to be done in this case.
>Please advise
>
>Thanks,
>RS
>Â
>
>On Thu, Sep 22, 2016 at 9:54 PM, Yann Ylavic <yl...@gmail.com> wrote:
>On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
><ra...@gmail.com> wrote:
> >
> > Access log has the following status:
> >Â [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200 16
>
>What's in the *error* log (path from the ErrorLog directive)?
>What about resources (CPU, load average, ...) on the httpd machine
>during the stress?
>
>Regards,
>Yann.
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>For additional commands, e-mail: users-help@httpd.apache.org
>
>
>
>
>
>
>
>--
>
>Rubén Toribio Aldeguer
>Técnico Sistemas DataCenter
>Informática Ãrea Sistemas
>(+34) 971743030
>www.riu.com / www.riuplaza.com
>
>Â Â Â Â Â Â Â Â Â Â Â
>Â
>
>This e-mail and its attachments, if any, are confidential and may be
>legally privileged. If you have received it in error, you are on notice of
>this status. Please do not copy or use it for any other purpose or
>disclose its contents to any other person: to do so could be a breach of
>confidence. You may contact us at +34 971 74 30 30 or at sender's e-mail
>address.
>Â Please, consider the environment before printing this email.
>
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rubén Toribio Aldeguer <rt...@riu.com>.
I think that is your problem: OS user for httpd or ab only can open
(sumuntaneousy) 1024 files.
open files (-n) 1024
Try to set to 10000 for example. Read "man ulimit" to set how to do it. I
dont remenber sinstax.
2016-09-23 20:48 GMT+02:00 Rashmi Srinivasan <rashmisrinivasan2007@gmail.com
>:
> Hi,
>
> This is the output of ulimit -a
> core file size (blocks, -c) 0
> data seg size (kbytes, -d) unlimited
> scheduling priority (-e) 0
> file size (blocks, -f) unlimited
> pending signals (-i) 15944
> max locked memory (kbytes, -l) 64
> max memory size (kbytes, -m) unlimited
> open files (-n) 1024
> pipe size (512 bytes, -p) 8
> POSIX message queues (bytes, -q) 819200
> real-time priority (-r) 0
> stack size (kbytes, -s) 10240
> cpu time (seconds, -t) unlimited
> max user processes (-u) 1024
> virtual memory (kbytes, -v) unlimited
> file locks (-x) unlimited
>
> Thanks,
>
> On Fri, Sep 23, 2016 at 8:25 PM, Rubén Toribio Aldeguer <rt...@riu.com>
> wrote:
>
>> I think your problem is not Apache, but your OS.
>> I think Apache 2.2 and 4.4 uses diferent mpm mode (my memory is poor).
>> I think you OS is limiting the number of Opens Files that can Manage.
>> (safety reasons)
>> Please, can you print you ulimit output, as I advise on a previous mail?
>>
>> Thanks.
>>
>> 2016-09-23 11:55 GMT+02:00 Rashmi Srinivasan <
>> rashmisrinivasan2007@gmail.com>:
>>
>>> Hi,
>>> Do you feel this is the issue with some configuration or would this be
>>> an issue with apache itself.
>>> Has anybody encountered a performance issue of this kind.
>>> Please comment
>>>
>>> Thanks,
>>> RS
>>>
>>> On Fri, Sep 23, 2016 at 1:43 PM, Rashmi Srinivasan <
>>> rashmisrinivasan2007@gmail.com> wrote:
>>>
>>>> Is there a minimum requirement for apache 2.4 to run these tests?
>>>> I have tried on different machines with different configurations with
>>>> the same outcome.
>>>> Please advise.
>>>>
>>>> Thanks,
>>>> RS
>>>>
>>>> On Fri, Sep 23, 2016 at 1:14 AM, Rashmi Srinivasan <
>>>> rashmisrinivasan2007@gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>> Thanks for checking this,
>>>>>
>>>>> I wanted to check the below:'
>>>>> Stress testing of apache 2.2 works very well with the default
>>>>> mpm worker onfiguration
>>>>> However, apache 2.4 doesnt work at all with the default
>>>>> configuration, gives the error:
>>>>> 2000 concurrent requests
>>>>> Benchmarking x.x.x.x (be patient)
>>>>> socket: Too many open files (24)
>>>>>
>>>>> After changing the configuration, as described in the previous email,
>>>>> it starts processing them:
>>>>> Lots of timeouts are occurring.
>>>>> Error in the error_lo is:
>>>>> "AH00046: child process still did not exit,
>>>>> sending a SIGKILL"
>>>>> (2)No such file or directory: [client
>>>>> x.x.x.c] AH01256: connect #7 to cgi daemon failed, sleeping before retry
>>>>> 11)Resource temporarily unavailable:
>>>>> AH01252: couldn't create child process: 11:
>>>>> I also noticed that the CPU utilzation reached 99.9%
>>>>> Which is when apache terminates
>>>>>
>>>>> What changes are to be done in this case.
>>>>> Please advise
>>>>>
>>>>> Thanks,
>>>>> RS
>>>>>
>>>>>
>>>>> On Thu, Sep 22, 2016 at 9:54 PM, Yann Ylavic <yl...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
>>>>>> <ra...@gmail.com> wrote:
>>>>>> >
>>>>>> > Access log has the following status:
>>>>>> > [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0"
>>>>>> 200 16
>>>>>>
>>>>>> What's in the *error* log (path from the ErrorLog directive)?
>>>>>> What about resources (CPU, load average, ...) on the httpd machine
>>>>>> during the stress?
>>>>>>
>>>>>> Regards,
>>>>>> Yann.
>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>>>>>> For additional commands, e-mail: users-help@httpd.apache.org
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>>
>> --
>>
>> *Rubén Toribio Aldeguer*
>> Técnico Sistemas DataCenter
>> Informática Área Sistemas
>> (+34) 971743030
>> www.riu.com / www.riuplaza.com
>>
>>
>> [image: Facebook] <http://www.facebook.com/Riuhoteles> [image: Twitter]
>> <http://twitter.com/#%21/RiuHoteles> [image: Flickr]
>> <http://www.flickr.com/photos/riuhotels/collections/> [image: Youtube]
>> <http://www.youtube.com/user/RiuHotelsandResorts> [image: Google Plus]
>> <https://plus.google.com/102337793674910512804/posts>
>>
>>
>>
>> This e-mail and its attachments, if any, are confidential and may be
>> legally privileged. If you have received it in error, you are on notice of
>> this status. Please do not copy or use it for any other purpose or disclose
>> its contents to any other person: to do so could be a breach of confidence.
>> You may contact us at +34 971 74 30 30 or at sender's e-mail address.
>> [image: Facebook] *Please, consider the environment before printing this
>> email.* <http://www.riu.com/es/sostenibilidad/inicio.jsp>
>>
>
>
--
*Rubén Toribio Aldeguer*
Técnico Sistemas DataCenter
Informática Área Sistemas
(+34) 971743030
www.riu.com / www.riuplaza.com
--
[image: Facebook] <http://www.facebook.com/Riuhoteles> [image: Twitter]
<http://twitter.com/#%21/RiuHoteles> [image: Flickr]
<http://www.flickr.com/photos/riuhotels/collections/> [image: Youtube]
<http://www.youtube.com/user/RiuHotelsandResorts> [image: Google Plus]
<https://plus.google.com/102337793674910512804/posts>
This e-mail and its attachments, if any, are confidential and may be
legally privileged. If you have received it in error, you are on notice of
this status. Please do not copy or use it for any other purpose or disclose
its contents to any other person: to do so could be a breach of confidence.
You may contact us at +34 971 74 30 30 or at sender's e-mail address.
[image: Facebook] *Please, consider the environment before printing this
email.* <http://www.riu.com/es/sostenibilidad/inicio.jsp>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rashmi Srinivasan <ra...@gmail.com>.
Hi,
This is the output of ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 15944
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
Thanks,
On Fri, Sep 23, 2016 at 8:25 PM, Rubén Toribio Aldeguer <rt...@riu.com>
wrote:
> I think your problem is not Apache, but your OS.
> I think Apache 2.2 and 4.4 uses diferent mpm mode (my memory is poor).
> I think you OS is limiting the number of Opens Files that can Manage.
> (safety reasons)
> Please, can you print you ulimit output, as I advise on a previous mail?
>
> Thanks.
>
> 2016-09-23 11:55 GMT+02:00 Rashmi Srinivasan <rashmisrinivasan2007@gmail.
> com>:
>
>> Hi,
>> Do you feel this is the issue with some configuration or would this be an
>> issue with apache itself.
>> Has anybody encountered a performance issue of this kind.
>> Please comment
>>
>> Thanks,
>> RS
>>
>> On Fri, Sep 23, 2016 at 1:43 PM, Rashmi Srinivasan <
>> rashmisrinivasan2007@gmail.com> wrote:
>>
>>> Is there a minimum requirement for apache 2.4 to run these tests?
>>> I have tried on different machines with different configurations with
>>> the same outcome.
>>> Please advise.
>>>
>>> Thanks,
>>> RS
>>>
>>> On Fri, Sep 23, 2016 at 1:14 AM, Rashmi Srinivasan <
>>> rashmisrinivasan2007@gmail.com> wrote:
>>>
>>>> Hi,
>>>> Thanks for checking this,
>>>>
>>>> I wanted to check the below:'
>>>> Stress testing of apache 2.2 works very well with the default
>>>> mpm worker onfiguration
>>>> However, apache 2.4 doesnt work at all with the default
>>>> configuration, gives the error:
>>>> 2000 concurrent requests
>>>> Benchmarking x.x.x.x (be patient)
>>>> socket: Too many open files (24)
>>>>
>>>> After changing the configuration, as described in the previous email,
>>>> it starts processing them:
>>>> Lots of timeouts are occurring.
>>>> Error in the error_lo is:
>>>> "AH00046: child process still did not exit,
>>>> sending a SIGKILL"
>>>> (2)No such file or directory: [client
>>>> x.x.x.c] AH01256: connect #7 to cgi daemon failed, sleeping before retry
>>>> 11)Resource temporarily unavailable:
>>>> AH01252: couldn't create child process: 11:
>>>> I also noticed that the CPU utilzation reached 99.9%
>>>> Which is when apache terminates
>>>>
>>>> What changes are to be done in this case.
>>>> Please advise
>>>>
>>>> Thanks,
>>>> RS
>>>>
>>>>
>>>> On Thu, Sep 22, 2016 at 9:54 PM, Yann Ylavic <yl...@gmail.com>
>>>> wrote:
>>>>
>>>>> On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
>>>>> <ra...@gmail.com> wrote:
>>>>> >
>>>>> > Access log has the following status:
>>>>> > [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200
>>>>> 16
>>>>>
>>>>> What's in the *error* log (path from the ErrorLog directive)?
>>>>> What about resources (CPU, load average, ...) on the httpd machine
>>>>> during the stress?
>>>>>
>>>>> Regards,
>>>>> Yann.
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>>>>> For additional commands, e-mail: users-help@httpd.apache.org
>>>>>
>>>>>
>>>>
>>>
>>
>
>
> --
>
> *Rubén Toribio Aldeguer*
> Técnico Sistemas DataCenter
> Informática Área Sistemas
> (+34) 971743030
> www.riu.com / www.riuplaza.com
>
>
> [image: Facebook] <http://www.facebook.com/Riuhoteles> [image: Twitter]
> <http://twitter.com/#%21/RiuHoteles> [image: Flickr]
> <http://www.flickr.com/photos/riuhotels/collections/> [image: Youtube]
> <http://www.youtube.com/user/RiuHotelsandResorts> [image: Google Plus]
> <https://plus.google.com/102337793674910512804/posts>
>
>
>
> This e-mail and its attachments, if any, are confidential and may be
> legally privileged. If you have received it in error, you are on notice of
> this status. Please do not copy or use it for any other purpose or disclose
> its contents to any other person: to do so could be a breach of confidence.
> You may contact us at +34 971 74 30 30 or at sender's e-mail address.
> [image: Facebook] *Please, consider the environment before printing this
> email.* <http://www.riu.com/es/sostenibilidad/inicio.jsp>
>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rubén Toribio Aldeguer <rt...@riu.com>.
I think your problem is not Apache, but your OS.
I think Apache 2.2 and 4.4 uses diferent mpm mode (my memory is poor).
I think you OS is limiting the number of Opens Files that can Manage.
(safety reasons)
Please, can you print you ulimit output, as I advise on a previous mail?
Thanks.
2016-09-23 11:55 GMT+02:00 Rashmi Srinivasan <rashmisrinivasan2007@gmail.com
>:
> Hi,
> Do you feel this is the issue with some configuration or would this be an
> issue with apache itself.
> Has anybody encountered a performance issue of this kind.
> Please comment
>
> Thanks,
> RS
>
> On Fri, Sep 23, 2016 at 1:43 PM, Rashmi Srinivasan <
> rashmisrinivasan2007@gmail.com> wrote:
>
>> Is there a minimum requirement for apache 2.4 to run these tests?
>> I have tried on different machines with different configurations with the
>> same outcome.
>> Please advise.
>>
>> Thanks,
>> RS
>>
>> On Fri, Sep 23, 2016 at 1:14 AM, Rashmi Srinivasan <
>> rashmisrinivasan2007@gmail.com> wrote:
>>
>>> Hi,
>>> Thanks for checking this,
>>>
>>> I wanted to check the below:'
>>> Stress testing of apache 2.2 works very well with the default
>>> mpm worker onfiguration
>>> However, apache 2.4 doesnt work at all with the default
>>> configuration, gives the error:
>>> 2000 concurrent requests
>>> Benchmarking x.x.x.x (be patient)
>>> socket: Too many open files (24)
>>>
>>> After changing the configuration, as described in the previous email, it
>>> starts processing them:
>>> Lots of timeouts are occurring.
>>> Error in the error_lo is:
>>> "AH00046: child process still did not exit,
>>> sending a SIGKILL"
>>> (2)No such file or directory: [client
>>> x.x.x.c] AH01256: connect #7 to cgi daemon failed, sleeping before retry
>>> 11)Resource temporarily unavailable:
>>> AH01252: couldn't create child process: 11:
>>> I also noticed that the CPU utilzation reached 99.9%
>>> Which is when apache terminates
>>>
>>> What changes are to be done in this case.
>>> Please advise
>>>
>>> Thanks,
>>> RS
>>>
>>>
>>> On Thu, Sep 22, 2016 at 9:54 PM, Yann Ylavic <yl...@gmail.com>
>>> wrote:
>>>
>>>> On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
>>>> <ra...@gmail.com> wrote:
>>>> >
>>>> > Access log has the following status:
>>>> > [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200
>>>> 16
>>>>
>>>> What's in the *error* log (path from the ErrorLog directive)?
>>>> What about resources (CPU, load average, ...) on the httpd machine
>>>> during the stress?
>>>>
>>>> Regards,
>>>> Yann.
>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>>>> For additional commands, e-mail: users-help@httpd.apache.org
>>>>
>>>>
>>>
>>
>
--
*Rubén Toribio Aldeguer*
Técnico Sistemas DataCenter
Informática Área Sistemas
(+34) 971743030
www.riu.com / www.riuplaza.com
--
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Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rashmi Srinivasan <ra...@gmail.com>.
Hi,
Do you feel this is the issue with some configuration or would this be an
issue with apache itself.
Has anybody encountered a performance issue of this kind.
Please comment
Thanks,
RS
On Fri, Sep 23, 2016 at 1:43 PM, Rashmi Srinivasan <
rashmisrinivasan2007@gmail.com> wrote:
> Is there a minimum requirement for apache 2.4 to run these tests?
> I have tried on different machines with different configurations with the
> same outcome.
> Please advise.
>
> Thanks,
> RS
>
> On Fri, Sep 23, 2016 at 1:14 AM, Rashmi Srinivasan <
> rashmisrinivasan2007@gmail.com> wrote:
>
>> Hi,
>> Thanks for checking this,
>>
>> I wanted to check the below:'
>> Stress testing of apache 2.2 works very well with the default mpm
>> worker onfiguration
>> However, apache 2.4 doesnt work at all with the default
>> configuration, gives the error:
>> 2000 concurrent requests
>> Benchmarking x.x.x.x (be patient)
>> socket: Too many open files (24)
>>
>> After changing the configuration, as described in the previous email, it
>> starts processing them:
>> Lots of timeouts are occurring.
>> Error in the error_lo is:
>> "AH00046: child process still did not exit,
>> sending a SIGKILL"
>> (2)No such file or directory: [client x.x.x.c]
>> AH01256: connect #7 to cgi daemon failed, sleeping before retry
>> 11)Resource temporarily unavailable: AH01252:
>> couldn't create child process: 11:
>> I also noticed that the CPU utilzation reached 99.9%
>> Which is when apache terminates
>>
>> What changes are to be done in this case.
>> Please advise
>>
>> Thanks,
>> RS
>>
>>
>> On Thu, Sep 22, 2016 at 9:54 PM, Yann Ylavic <yl...@gmail.com>
>> wrote:
>>
>>> On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
>>> <ra...@gmail.com> wrote:
>>> >
>>> > Access log has the following status:
>>> > [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200 16
>>>
>>> What's in the *error* log (path from the ErrorLog directive)?
>>> What about resources (CPU, load average, ...) on the httpd machine
>>> during the stress?
>>>
>>> Regards,
>>> Yann.
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>>> For additional commands, e-mail: users-help@httpd.apache.org
>>>
>>>
>>
>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rashmi Srinivasan <ra...@gmail.com>.
Is there a minimum requirement for apache 2.4 to run these tests?
I have tried on different machines with different configurations with the
same outcome.
Please advise.
Thanks,
RS
On Fri, Sep 23, 2016 at 1:14 AM, Rashmi Srinivasan <
rashmisrinivasan2007@gmail.com> wrote:
> Hi,
> Thanks for checking this,
>
> I wanted to check the below:'
> Stress testing of apache 2.2 works very well with the default mpm
> worker onfiguration
> However, apache 2.4 doesnt work at all with the default
> configuration, gives the error:
> 2000 concurrent requests
> Benchmarking x.x.x.x (be patient)
> socket: Too many open files (24)
>
> After changing the configuration, as described in the previous email, it
> starts processing them:
> Lots of timeouts are occurring.
> Error in the error_lo is:
> "AH00046: child process still did not exit,
> sending a SIGKILL"
> (2)No such file or directory: [client x.x.x.c]
> AH01256: connect #7 to cgi daemon failed, sleeping before retry
> 11)Resource temporarily unavailable: AH01252:
> couldn't create child process: 11:
> I also noticed that the CPU utilzation reached 99.9%
> Which is when apache terminates
>
> What changes are to be done in this case.
> Please advise
>
> Thanks,
> RS
>
>
> On Thu, Sep 22, 2016 at 9:54 PM, Yann Ylavic <yl...@gmail.com> wrote:
>
>> On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
>> <ra...@gmail.com> wrote:
>> >
>> > Access log has the following status:
>> > [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200 16
>>
>> What's in the *error* log (path from the ErrorLog directive)?
>> What about resources (CPU, load average, ...) on the httpd machine
>> during the stress?
>>
>> Regards,
>> Yann.
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>> For additional commands, e-mail: users-help@httpd.apache.org
>>
>>
>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rashmi Srinivasan <ra...@gmail.com>.
Hi,
Thanks for checking this,
I wanted to check the below:'
Stress testing of apache 2.2 works very well with the default mpm
worker onfiguration
However, apache 2.4 doesnt work at all with the default
configuration, gives the error:
2000 concurrent requests
Benchmarking x.x.x.x (be patient)
socket: Too many open files (24)
After changing the configuration, as described in the previous email, it
starts processing them:
Lots of timeouts are occurring.
Error in the error_lo is:
"AH00046: child process still did not exit,
sending a SIGKILL"
(2)No such file or directory: [client x.x.x.c]
AH01256: connect #7 to cgi daemon failed, sleeping before retry
11)Resource temporarily unavailable: AH01252:
couldn't create child process: 11:
I also noticed that the CPU utilzation reached 99.9%
Which is when apache terminates
What changes are to be done in this case.
Please advise
Thanks,
RS
On Thu, Sep 22, 2016 at 9:54 PM, Yann Ylavic <yl...@gmail.com> wrote:
> On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
> <ra...@gmail.com> wrote:
> >
> > Access log has the following status:
> > [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200 16
>
> What's in the *error* log (path from the ErrorLog directive)?
> What about resources (CPU, load average, ...) on the httpd machine
> during the stress?
>
> Regards,
> Yann.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Yann Ylavic <yl...@gmail.com>.
On Thu, Sep 22, 2016 at 5:20 PM, Rashmi Srinivasan
<ra...@gmail.com> wrote:
>
> Access log has the following status:
> [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200 16
What's in the *error* log (path from the ErrorLog directive)?
What about resources (CPU, load average, ...) on the httpd machine
during the stress?
Regards,
Yann.
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rubén Toribio Aldeguer <rt...@riu.com>.
Are you testing from de same host that runs httpd?
Could you paste paste the output of ulimit -a , ie:
[apache@----------- ~]$ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 30504
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
******* open files (-n) 1024*
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
In rhel default seems to be 1024.
2016-09-22 17:20 GMT+02:00 Rashmi Srinivasan <rashmisrinivasan2007@gmail.com
>:
> Hi,
>
> This is my mpm conf:
>
> <IfModule mpm_event_module>
> ServerLimit 80
> StartServers 3
> MinSpareThreads 75
> MaxSpareThreads 250
> ThreadsPerChild 25
> MaxRequestWorkers 2000
> MaxConnectionsPerChild 0
> </IfModule>
>
> The issue occurs even upon increasing the serverlimit and
> MaxRequestWorkers.
>
> Access log has the following status:
> [22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200 16
>
> Please check and let me know.
>
> Thanks ,
> RS
>
> On Thu, Sep 22, 2016 at 8:34 PM, Rashmi Srinivasan <
> rashmisrinivasan2007@gmail.com> wrote:
>
>>
>> This is my mpm conf:
>>
>> <IfModule mpm_event_module>
>> ServerLimit 80
>> StartServers 3
>> MinSpareThreads 75
>> MaxSpareThreads 250
>> ThreadsPerChild 25
>> MaxRequestWorkers 2000
>> MaxConnectionsPerChild 0
>> </IfModule>
>>
>> The issue occurs
>>
>> Access log has the status:
>>
>>
>> On Thu, Sep 22, 2016 at 3:47 PM, Yann Ylavic <yl...@gmail.com>
>> wrote:
>>
>>> On Thu, Sep 22, 2016 at 8:57 AM, Rashmi Srinivasan
>>> <ra...@gmail.com> wrote:
>>> >
>>> > Benchmarking x.x.x.x (be patient)
>>> > Completed 8000 requests
>>> > apr_socket_recv: Connection timed out (110)
>>> > Total of 8972 requests completed
>>>
>>> This can be related to some limits reached on the server side (cgi
>>> connection/execution time, MaxRequestWorkers, ...).
>>> Any error message in httpd?
>>>
>>> Regards,
>>> Yann.
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>>> For additional commands, e-mail: users-help@httpd.apache.org
>>>
>>>
>>
>
--
*Rubén Toribio Aldeguer*
Técnico Sistemas DataCenter
Informática Área Sistemas
(+34) 971743030
www.riu.com / www.riuplaza.com
--
[image: Facebook] <http://www.facebook.com/Riuhoteles> [image: Twitter]
<http://twitter.com/#%21/RiuHoteles> [image: Flickr]
<http://www.flickr.com/photos/riuhotels/collections/> [image: Youtube]
<http://www.youtube.com/user/RiuHotelsandResorts> [image: Google Plus]
<https://plus.google.com/102337793674910512804/posts>
This e-mail and its attachments, if any, are confidential and may be
legally privileged. If you have received it in error, you are on notice of
this status. Please do not copy or use it for any other purpose or disclose
its contents to any other person: to do so could be a breach of confidence.
You may contact us at +34 971 74 30 30 or at sender's e-mail address.
[image: Facebook] *Please, consider the environment before printing this
email.* <http://www.riu.com/es/sostenibilidad/inicio.jsp>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rashmi Srinivasan <ra...@gmail.com>.
Hi,
This is my mpm conf:
<IfModule mpm_event_module>
ServerLimit 80
StartServers 3
MinSpareThreads 75
MaxSpareThreads 250
ThreadsPerChild 25
MaxRequestWorkers 2000
MaxConnectionsPerChild 0
</IfModule>
The issue occurs even upon increasing the serverlimit and MaxRequestWorkers.
Access log has the following status:
[22/Sep/2016:20:17:21 +0530] "GET /cgi-bin/script.cgi HTTP/1.0" 200 16
Please check and let me know.
Thanks ,
RS
On Thu, Sep 22, 2016 at 8:34 PM, Rashmi Srinivasan <
rashmisrinivasan2007@gmail.com> wrote:
>
> This is my mpm conf:
>
> <IfModule mpm_event_module>
> ServerLimit 80
> StartServers 3
> MinSpareThreads 75
> MaxSpareThreads 250
> ThreadsPerChild 25
> MaxRequestWorkers 2000
> MaxConnectionsPerChild 0
> </IfModule>
>
> The issue occurs
>
> Access log has the status:
>
>
> On Thu, Sep 22, 2016 at 3:47 PM, Yann Ylavic <yl...@gmail.com> wrote:
>
>> On Thu, Sep 22, 2016 at 8:57 AM, Rashmi Srinivasan
>> <ra...@gmail.com> wrote:
>> >
>> > Benchmarking x.x.x.x (be patient)
>> > Completed 8000 requests
>> > apr_socket_recv: Connection timed out (110)
>> > Total of 8972 requests completed
>>
>> This can be related to some limits reached on the server side (cgi
>> connection/execution time, MaxRequestWorkers, ...).
>> Any error message in httpd?
>>
>> Regards,
>> Yann.
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>> For additional commands, e-mail: users-help@httpd.apache.org
>>
>>
>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rashmi Srinivasan <ra...@gmail.com>.
This is my mpm conf:
<IfModule mpm_event_module>
ServerLimit 80
StartServers 3
MinSpareThreads 75
MaxSpareThreads 250
ThreadsPerChild 25
MaxRequestWorkers 2000
MaxConnectionsPerChild 0
</IfModule>
The issue occurs
Access log has the status:
On Thu, Sep 22, 2016 at 3:47 PM, Yann Ylavic <yl...@gmail.com> wrote:
> On Thu, Sep 22, 2016 at 8:57 AM, Rashmi Srinivasan
> <ra...@gmail.com> wrote:
> >
> > Benchmarking x.x.x.x (be patient)
> > Completed 8000 requests
> > apr_socket_recv: Connection timed out (110)
> > Total of 8972 requests completed
>
> This can be related to some limits reached on the server side (cgi
> connection/execution time, MaxRequestWorkers, ...).
> Any error message in httpd?
>
> Regards,
> Yann.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Yann Ylavic <yl...@gmail.com>.
On Thu, Sep 22, 2016 at 8:57 AM, Rashmi Srinivasan
<ra...@gmail.com> wrote:
>
> Benchmarking x.x.x.x (be patient)
> Completed 8000 requests
> apr_socket_recv: Connection timed out (110)
> Total of 8972 requests completed
This can be related to some limits reached on the server side (cgi
connection/execution time, MaxRequestWorkers, ...).
Any error message in httpd?
Regards,
Yann.
---------------------------------------------------------------------
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Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Rashmi Srinivasan <ra...@gmail.com>.
Thank you so much, I will check.
Would need help on the timeout error as well:
Benchmarking x.x.x.x (be patient)
Completed 8000 requests
apr_socket_recv: Connection timed out (110)
Total of 8972 requests completed
Thanks,
RS
On Thu, Sep 22, 2016 at 12:10 PM, Yann Ylavic <yl...@gmail.com> wrote:
> Hi,
>
> On Thu, Sep 22, 2016 at 6:32 AM, Rashmi Srinivasan
> <ra...@gmail.com> wrote:
> >
> > ================================================
> > 2000 concurrent requests
> >
> > Benchmarking x.x.x.x (be patient)
> > socket: Too many open files (24)
>
> You should probably change the 'ulimit -n' on the host running ab,
> something like:
>
> $ ulimit -n 4096 # once for the whole terminal/shell session
> $ ab ... # as many times as needed ;)
>
> Regards,
> Yann.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
>
>
Re: [users@httpd] Apache 2.4 (Apache Benchmarking) - Too many open
files (24)
Posted by Yann Ylavic <yl...@gmail.com>.
Hi,
On Thu, Sep 22, 2016 at 6:32 AM, Rashmi Srinivasan
<ra...@gmail.com> wrote:
>
> ================================================
> 2000 concurrent requests
>
> Benchmarking x.x.x.x (be patient)
> socket: Too many open files (24)
You should probably change the 'ulimit -n' on the host running ab,
something like:
$ ulimit -n 4096 # once for the whole terminal/shell session
$ ab ... # as many times as needed ;)
Regards,
Yann.
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