Hello

I keep getting occasional slow downs on the server, with no apparant
relation to user count.
It was slow at 800 users per second and now with 1300 is instant.

I started logging slow scripts in php-fpm and I catch, this :

[26-Jan-2013 19:02:42] [pool www] pid 78697
script_filename = /var/www/html/v.php
[0x00007fe0dea8eb28] session_start() /var/www/html/include/config.php:62
[0x00007fe0dea8a5a8] +++ dump failed

This is something in the beginning of any script, my slow down is 30!!!
seconds

What is going on in there?

Thanks for any tips


---------------------------------------------------------------
Cristian Rusu
Web Developement & Electronic Publishing

======
Crilance.com
Crilance.blogspot.com

--

How's the server doing on disk space on the partition where /tmp sits? Are
you experiencing any high CPU load, or worse, bottlenecked disk IO? You can
check the latter with `iostat`.

On Saturday, January 26, 2013 12:10:41 PM UTC-6, Cristian Rusu wrote:
>
> Hello
>
> I keep getting occasional slow downs on the server, with no apparant
> relation to user count.
> It was slow at 800 users per second and now with 1300 is instant.
>
> I started logging slow scripts in php-fpm and I catch, this :
>
> [26-Jan-2013 19:02:42] [pool www] pid 78697
> script_filename = /var/www/html/v.php
> [0x00007fe0dea8eb28] session_start() /var/www/html/include/config.php:62
> [0x00007fe0dea8a5a8] +++ dump failed
>
> This is something in the beginning of any script, my slow down is 30!!!
> seconds
>
> What is going on in there?
>
> Thanks for any tips
>
>
> ---------------------------------------------------------------
> Cristian Rusu
> Web Developement & Electronic Publishing
>
> ======
> Crilance.com
> Crilance.blogspot.com
>

--

Hello

Thanks for the reply

I found out that session_start is just fine, problem is with a previous
call on same session that hangs on some remote url reads. The second call
is just blocked until the first either finishes or gets killed by timeout.



---------------------------------------------------------------
Cristian Rusu
Web Developement & Electronic Publishing

======
Crilance.com
Crilance.blogspot.com


On Sun, Jan 27, 2013 at 7:12 PM, Brian Cline <brian.cline@gmail.com> wrote:

> How's the server doing on disk space on the partition where /tmp sits? Are
> you experiencing any high CPU load, or worse, bottlenecked disk IO? You can
> check the latter with `iostat`.
>
>
> On Saturday, January 26, 2013 12:10:41 PM UTC-6, Cristian Rusu wrote:
>>
>> Hello
>>
>> I keep getting occasional slow downs on the server, with no apparant
>> relation to user count.
>> It was slow at 800 users per second and now with 1300 is instant.
>>
>> I started logging slow scripts in php-fpm and I catch, this :
>>
>> [26-Jan-2013 19:02:42] [pool www] pid 78697
>> script_filename = /var/www/html/v.php
>> [0x00007fe0dea8eb28] session_start() /var/www/html/include/config.**
>> php:62
>> [0x00007fe0dea8a5a8] +++ dump failed
>>
>> This is something in the beginning of any script, my slow down is 30!!!
>> seconds
>>
>> What is going on in there?
>>
>> Thanks for any tips
>>
>>
>> ------------------------------**------------------------------**---
>> Cristian Rusu
>> Web Developement & Electronic Publishing
>>
>> ======
>> Crilance.com
>> Crilance.blogspot.com
>>
> --
>
>
>
>

--

If it's a 30 second timeout it may be a DNS lookup timeout. Assuming linux
- stick strace on the process and it'll tell you fr sure.

On Mon, Jan 28, 2013 at 5:45 AM, Cristian Rusu <crirus@gmail.com> wrote:

> Hello
>
> Thanks for the reply
>
> I found out that session_start is just fine, problem is with a previous
> call on same session that hangs on some remote url reads. The second call
> is just blocked until the first either finishes or gets killed by timeout.
>
>
>
>
> ---------------------------------------------------------------
> Cristian Rusu
> Web Developement & Electronic Publishing
>
> ======
> Crilance.com
> Crilance.blogspot.com
>
>
> On Sun, Jan 27, 2013 at 7:12 PM, Brian Cline <brian.cline@gmail.com>wrote:
>
>> How's the server doing on disk space on the partition where /tmp sits?
>> Are you experiencing any high CPU load, or worse, bottlenecked disk IO? You
>> can check the latter with `iostat`.
>>
>>
>> On Saturday, January 26, 2013 12:10:41 PM UTC-6, Cristian Rusu wrote:
>>>
>>> Hello
>>>
>>> I keep getting occasional slow downs on the server, with no apparant
>>> relation to user count.
>>> It was slow at 800 users per second and now with 1300 is instant.
>>>
>>> I started logging slow scripts in php-fpm and I catch, this :
>>>
>>> [26-Jan-2013 19:02:42] [pool www] pid 78697
>>> script_filename = /var/www/html/v.php
>>> [0x00007fe0dea8eb28] session_start() /var/www/html/include/config.**
>>> php:62
>>> [0x00007fe0dea8a5a8] +++ dump failed
>>>
>>> This is something in the beginning of any script, my slow down is 30!!!
>>> seconds
>>>
>>> What is going on in there?
>>>
>>> Thanks for any tips
>>>
>>>
>>> ------------------------------**------------------------------**---
>>> Cristian Rusu
>>> Web Developement & Electronic Publishing
>>>
>>> ======
>>> Crilance.com
>>> Crilance.blogspot.com
>>>
>> --
>>
>>
>>
>>
>
> --
>
>
>
>

--

Well the problem was the connection to remote server, not the
session_start(), all good now...
---------------------------------------------------------------
Cristian Rusu
Web Developement & Electronic Publishing

======
Crilance.com
Crilance.blogspot.com


On Mon, Jan 28, 2013 at 6:51 AM, Dave Kierans <dkierans@gmail.com> wrote:

> If it's a 30 second timeout it may be a DNS lookup timeout. Assuming
> linux - stick strace on the process and it'll tell you fr sure.
>
> On Mon, Jan 28, 2013 at 5:45 AM, Cristian Rusu <crirus@gmail.com> wrote:
>
>> Hello
>>
>> Thanks for the reply
>>
>> I found out that session_start is just fine, problem is with a previous
>> call on same session that hangs on some remote url reads. The second call
>> is just blocked until the first either finishes or gets killed by timeout.
>>
>>
>>
>>
>> ---------------------------------------------------------------
>> Cristian Rusu
>> Web Developement & Electronic Publishing
>>
>> ======
>> Crilance.com
>> Crilance.blogspot.com
>>
>>
>> On Sun, Jan 27, 2013 at 7:12 PM, Brian Cline <brian.cline@gmail.com>wrote:
>>
>>> How's the server doing on disk space on the partition where /tmp sits?
>>> Are you experiencing any high CPU load, or worse, bottlenecked disk IO? You
>>> can check the latter with `iostat`.
>>>
>>>
>>> On Saturday, January 26, 2013 12:10:41 PM UTC-6, Cristian Rusu wrote:
>>>>
>>>> Hello
>>>>
>>>> I keep getting occasional slow downs on the server, with no apparant
>>>> relation to user count.
>>>> It was slow at 800 users per second and now with 1300 is instant.
>>>>
>>>> I started logging slow scripts in php-fpm and I catch, this :
>>>>
>>>> [26-Jan-2013 19:02:42] [pool www] pid 78697
>>>> script_filename = /var/www/html/v.php
>>>> [0x00007fe0dea8eb28] session_start() /var/www/html/include/config.**
>>>> php:62
>>>> [0x00007fe0dea8a5a8] +++ dump failed
>>>>
>>>> This is something in the beginning of any script, my slow down is 30!!!
>>>> seconds
>>>>
>>>> What is going on in there?
>>>>
>>>> Thanks for any tips
>>>>
>>>>
>>>> ------------------------------**------------------------------**---
>>>> Cristian Rusu
>>>> Web Developement & Electronic Publishing
>>>>
>>>> ======
>>>> Crilance.com
>>>> Crilance.blogspot.com
>>>>
>>> --
>>>
>>>
>>>
>>>
>>
>> --
>>
>>
>>
>>
>
> --
>
>
>
>

--