Re: Fw: [PHP-DEV] PHP 4.0 Bug #8889: Memory is not being freed.

Wow you're right. I stand corrected. You think I would have an understanding of fork......one of the most basic unix system principals. Jason ----- Original Message ----- From: "Zeev Suraski" <zeev@zend.com> To: "Jason Greene" <jason@inetgurus.net> Cc: <php-dev@lists.php.net> Sent: Tuesday, February 06, 2001 4:10 AM Subject: Re: Fw: [PHP-DEV] PHP 4.0 Bug #8889: Memory is not being freed. > As Hartmut said, this argument is invalid in the Apache environment. All > the static code in Apache is loaded to memory only once (in copy-on-write > pages, that will never be written to). Using DSO's in Apache has no > advantages other than ease of administration (which is an important thing > by itself for many), and some disadvantages. > > Zeev > > At 08:17 6/2/2001, Jason Greene wrote: > >Becuase DSO's are shared libs. Here is an excerpt about shared libs: > > > > > >The shared library code is not present in the executable image on disk. > >Shared code is loaded into memory once in the shared library segment and > >shared by all > >processes that reference it. The advantages of shared libraries are: > > > > Less disk space is used because the shared library code is not > > included in the executable programs. > > Less memory is used because the shared library code is only loaded > > once. > > Load time may be reduced because the shared library code may > > already be in memory. > > Performance may be improved because fewer page faults will be > > generated when the shared library code is already in memory. > >However, there is a > > performance cost in calls to shared library routines of one to > > eight instructions. > > > >Jason > > > > > > > >Zeev Suraski wrote: > > > > > > Why would using DSO reduce memory consumption? > > > Using DSO makes things easier to administer and maintain, but it doesn't > > > save any memory and it does pose a slight performance decrease... > > > > > > Zeev > > > > > > At 02:20 30/1/2001, Jason Greene wrote: > > > >MaxRequestsPerChild is perfectly safe, and I always believe in setting it. > > > >Keep in mind that if you compile all modules into apache statically, > > it takes > > > >up far more base mem per process. If you use all DSO's, you can > > > >significantly reduce memory usage. To find out what's in use on RH7 > > > >cat /proc/<pid>/maps of an apache child. > > > >You can also reduce the KeepAlive timeout value to help-out. > > > > > > > >Jason > > > > > > > > > > > > > > > > > > > > ----- Original Message ----- > > > > > From: "Rasmus Lerdorf" <rasmus@linuxcare.com> > > > > > To: "Filip Sielimowicz" <sielim@wp-sa.pl> > > > > > Cc: <php-dev@lists.php.net> > > > > > Sent: Monday, January 29, 2001 7:51 AM > > > > > Subject: Re: [PHP-DEV] PHP 4.0 Bug #8889: Memory is not being freed. > > > > > > > > > > > > > > > > On Mon, 29 Jan 2001, Filip Sielimowicz wrote: > > > > > > > > > > > > > > A quick fix would be to set your MaxRequestsPerChild to a > > > > > > > > lower > > > > value. > > > > > > > > > > > > > > Have you ever tried to measure the time of killing and > > > > > > > starting httpd process ? You can see that with a bare human eye. > > > > > > > > > > > > Sure. But that isn't something that happens on an actual > > request, so an > > > > > > end user isn't going to see that. > > > > > > > > > > > > -Rasmus > > > > > > > > > > > > > > > > > > -- > > > > > > PHP Development Mailing List > > > > > > <http://www.php.net/> > > > > > > To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net > > > > > > For additional commands, e-mail: php-dev-help@lists.php.net > > > > > > To contact the list administrators, e-mail: > > php-list-admin@lists.php.net > > > > > > > > > > > > > > > > > > > > > > >-- > > > >PHP Development Mailing List > > > ><http://www.php.net/> > > > >To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net > > > >For additional commands, e-mail: php-dev-help@lists.php.net > > > >To contact the list administrators, e-mail: php-list-admin@lists.php.net > > > > > > -- > > > Zeev Suraski <zeev@zend.com> > > > CTO & co-founder, Zend Technologies Ltd. > > > http://www.zend.com/ > > > >-- > >PHP Development Mailing List <http://www.php.net/> > >To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net > >For additional commands, e-mail: php-dev-help@lists.php.net > >To contact the list administrators, e-mail: php-list-admin@lists.php.net > > -- > Zeev Suraski <zeev@zend.com> > CTO & co-founder, Zend Technologies Ltd. > http://www.zend.com/ > >