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  4.  / Performance issue - XOOPS site gets throttled
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1
kaper
Performance issue - XOOPS site gets throttled

  • 2011/9/7 5:50

  • kaper

  • Just popping in

  • Posts: 75

  • Since: 2003/4/26


Please give me some hint what should I check.

I have a small internal XOOPS-based site, hosted on a PC with Linux. When it is a little bit more utilized, it gets "throttled" - gives absolutely blank page, with no error messagess (regardless of debug settings), just null. After a few dozens of seconds (30-60) page becomes accessible again, until again it is reloaded / changed too quickly.

With an extcal main page, I try doing subsequent reloads - after about 4 - 5 reloads page goes blank until I wait about a minute, then I can succesfully reload.

It seems to be only a XOOPS problem, because when it is hanging, I could load other simple pages (say containing phpinfo() ).

I tried changing host system - changing Linux distribution didn't help. Neither clearing XOOPS cache nor repairing DB tables (from admin maintenaince page). The problem occured before and after upgrading XOOPS from 2.3.3 to 2.5.1a.

Any hint appreciated. Thanks!
2
MACTEP
Re: Performance issue - XOOPS site gets throttled

  • 2011/9/7 18:48

  • MACTEP

  • Not too shy to talk

  • Posts: 127

  • Since: 2009/4/4 5


Weak/overloaded server.
For a solution of a problem, remove unnecessary processes.

In a file php.ini find a line max_execution_time = 60 and replace on 120
3
andrey3761
Re: Performance issue - XOOPS site gets throttled

In the file mainfile.php in the beginning to finish line:

ini_set( 'max_execution_time', '120' );
4
mboyden
Re: Performance issue - XOOPS site gets throttled

  • 2011/9/7 20:40

  • mboyden

  • Moderator

  • Posts: 484

  • Since: 2005/3/9 1


Do you have protector module installed? This sounds like it could be giving you the blank page for too many page requests. You can turn off protector temporarily to see if that is the issue and then change the settings. I've run into this one some of my sites.
Pessimists see difficulty in opportunity; Optimists see opportunity in difficulty. --W Churchill

XOOPS: Latest | Debug | Hosting and Web Development
5
trabis
Re: Performance issue - XOOPS site gets throttled

  • 2011/9/7 21:01

  • trabis

  • Core Developer

  • Posts: 2269

  • Since: 2006/9/1 1


You should turn debug on and look at 'timers' and 'queries' tab.

See if everything is taking equal time to load or if you can isolate the problem.
6
kaper
Re: Performance issue - XOOPS site gets throttled

  • 2011/9/8 5:10

  • kaper

  • Just popping in

  • Posts: 75

  • Since: 2003/4/26


Disabling protector helped so that blank appeared after 10 instead of 5 reloads. The problem must come from something else.
7
kaper
Re: Performance issue - XOOPS site gets throttled

  • 2011/9/8 5:14

  • kaper

  • Just popping in

  • Posts: 75

  • Since: 2003/4/26


Спасибо.

The server is a Pentium4 PC with 1 GB RAM, top shows about 10 proc. CPU utilization, no swapping.
The problem occurs when I am the only client, noone else is accessing the server.

Changing max_execution_time doesn't help.
8
kaper
Re: Performance issue - XOOPS site gets throttled

  • 2011/9/8 5:16

  • kaper

  • Just popping in

  • Posts: 75

  • Since: 2003/4/26


Turning debugging on does,'t help - the blank is truly blank - a null HTML output.
9
kaper
[SOLVED] Performance issue - XOOPS site gets throttled

  • 2011/9/21 11:33

  • kaper

  • Just popping in

  • Posts: 75

  • Since: 2003/4/26


Finally I found out that what was a problem for me, actually was an intended acting of Protector. My activity at the XOOPS site was interpreted as an F5 (refresh) DoS attactk and after a specified amount or page reloads, a blank screen was returned for a specified amount of time. All three parameters (reload count, response action, timeout) are configured at Protctor preferences page.

Formerly, according to advice, I have tried to to turn Protector off, I really don't know why then it didn't help. Maybe upgrading from ancient to contemporary version was the proper treatment.

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