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" <[EMAIL PROTECTED]>
To: "Jason Greene" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
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" <[EMAIL PROTECTED]>
> > > > > To: "Filip Sielimowicz" <[EMAIL PROTECTED]>
> > > > > Cc: <[EMAIL PROTECTED]>
> > > > > 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
> > > > > >
> > > > > >
> > > > > > --
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> > > >
> > > >
> > > >--
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> > > --
> > > Zeev Suraski <[EMAIL PROTECTED]>
> > > CTO & co-founder, Zend Technologies Ltd. http://www.zend.com/
> >
> >--
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> --
> Zeev Suraski <[EMAIL PROTECTED]>
> CTO & co-founder, Zend Technologies Ltd. http://www.zend.com/
>
>
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