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From "Gary W. Smith" <>
Subject RE: [users@httpd] Memory consumption
Date Wed, 03 Aug 2005 02:42:00 GMT
The following might help.  BTW, what is the memory limit in your php.ini
file?  You might want to ensure that is a manageable number and then
implement the code sample.



For download the big files (more than 8MB), you must used ob_flush()
because the function flush empty the Apache memory and not PHP memory.
And the max size of PHP memory is 8MB, but ob_flush is able to empty the
PHP memory.

header('Content-Type: application/force-download'); 
header ("Content-Length: " . filesize($file));
header ("Content-Disposition: attachment; filename=$theFileName");

   $fd = fopen($file, "r");
       echo fread($fd, 4096);




From: Kamil Srot [] 
Sent: Tuesday, August 02, 2005 6:01 PM
Subject: Re: [users@httpd] Memory consumption


Hi Gary,

Gary W. Smith wrote: 

How are you reading the file in order to output it?  Some of the PHP
commands do indeed read the entire file before processing.  This would
cause the entire file to sit in ram.  I believe there are some binary
functions that only read segments at a time.  I think that is where you
problem lies.

I don't thing it's the case... I tried everything I was aware of -
general fread, fpassthru etc.. all gives the same results...

Can you post (or send me) the relevant code segments that you use to
read the file and flush it to the client?

Currently its general fread/echo with no flush - as the flush seems even
to make the situation worser...

I can provide packet for reproduction if you are going to investigate...

Thank you,

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