On 12/12/2011 12:17, Enrico Daga wrote: > Hi all, > > I send this mail to both httpd and php lists. > I experienced the following problem running php scripts on httpd. > The RAM fills gradually until the system starts swapping, then, if I > don't restart the server, swap fills and everything goes down. > After some try/check tests, I realized that the memory used by a > single request is never released when the process is complete. This > makes the RAM to be gradually filled. > I thought in the beginning was a problem with the php application and > circular references on objects (I found some posts about this) then I > tried with a simple script (just populating a single array) but the > problem still occurs. > Our production environments are on Centos 4.9 - we have some legacy > applications that prevented us to upgrade the servers before. > For this sake I tried on fresh systems and more recent versions, and > experienced the same problem on Centos 4.9, 5.5 / PHP 5.1.6 and Centos > 6 / PHP 5.3.6, with distributed packages for both httpd and php and > default configuration. Httpd uses the Prefork MPM module. > I also noticed that this _do not_ happen on Ubuntu 11.10 server. I had > a look at the configuration of both httpd and php, but in both cases > (Centos and Ubuntu) I could not noticed a difference on parameters > regarding memory usage. > > Since this is the first time we run PHP applications on our httpd > servers I guess there is some configuration I should modify to have > the system behave correctly (free the memory when it is not needed). > The only workaround would be to move the MaxRequestsPerChild parameter > to 1, then killing the sub-process that hold the request, but I don't > believe this is the right solution. > Finally, I am not so sure that the issue I describe here belong to the > httpd or php lists, in this case please apologies, I would be very > happy if you can point me to a red-hat list (found a lot of lists, but > no sure which is related to httpd/php issues). > > Thank you very much for any hint. > > Best regards, > Enrico > Attach your configs when asking help, to have better performance (memory/cpu usage) dont use mod_php, instead try running php as cgi application (cgid). -- Simone Caruso IT Consultant +39 349 65 90 805 --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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