Thank you all for your hints. The problem was a misconfiguration, and seems to be solved reducing the number of child processes and adjusting MaxRequstPerChild parameter. We will try also with mod_fcgid. Do you know any trade off with respect to mod_php for developers (differences in env variables, for example)? Enrico 2011/12/14 Igor Galić <i.galic@xxxxxxxxxxxxxx>: > > > ----- Original Message ----- >> 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). > > or rather, mod_fcgid > >> -- >> 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 >> >> > > -- > Igor Galić > > Tel: +43 (0) 664 886 22 883 > Mail: i.galic@xxxxxxxxxxxxxx > URL: http://brainsware.org/ > GPG: 6880 4155 74BD FD7C B515 2EA5 4B1D 9E08 A097 C9AE > -- Enrico Daga -- http://www.enridaga.net skype: enri-pan --------------------------------------------------------------------- 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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