Bug #14053 Updated: Memory leak when using BIG array (>160MBytes)

From: Date: Thu, 15 Nov 2001 12:02:16 +0000
Subject: Bug #14053 Updated: Memory leak when using BIG array (>160MBytes)
References: 1  Groups: php.dev 
Request: Send a blank email to php-dev+get-70554@lists.php.net to get a copy of this message 
ID: 14053
User updated by: ingo.bez@in-systeme.de
Reported By: ingo.bez@in-systeme.de
Old Status: Feedback
Status: Open
Bug Type: Reproducible crash
Operating System: Linux (2.2.x/2.4.x)
PHP Version: 4.0.6
New Comment:

Hi!

We accumulate approx. 60,000 datasets with 12 columns in the array and manipulate nearly half of the
fields before we put them back into the db.

Ingo

Previous Comments:
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[2001-11-15 06:51:09] sniper@php.net

It would help also to know which database is this and 
if you have some sort of short example script to add here
too.


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[2001-11-15 05:17:50] derick@php.net

How many elements are there in the array? And isn't there another way to do this?

Derick

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[2001-11-14 10:47:48] ingo.bez@in-systeme.de

We do query a database and put the fetched result into some array, whichs keys are the first field
of the fetched result-row. No problem to get the array build, it eats up about 180MBytes from the
2GBytes RAM the server has.

The script works fine, does some manipulation in the array (strings, ints) and re-inserts it into
the database.

After the script terminates - all output to the browser is done - the Apache-process responsible for
that request won't free the acquired memory. It instead eats one CPU completely for about
3-5minutes and then freezes - with aprox. 180MBytes of reserved RAM. (Fire the request 10 times and
be sure to have the swap working!)

We currently use:
    - HP LC2000r (2*PIII 933MHz, 2GByte RAM, 18GB HDD)
    - Linux (Slackware 8.0), glibc2.2.3, Kernel 2.4.13 SMP
    - Apache 1.3.22
    - PHP 4.0.6
    - ZendOptimizer 1.1.0.
Tested and reproduced with:
    - Apache 1.3.20, 1.3.17
    - w/o ZendOptimizer.
    - PHP4.2.0-dev

It'll be nice to hear from you!


Thanks in advance,
     Ingo Bez

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