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Bug #57116 shm_segments doesn't work
Submitted: 2006-06-29 08:43 UTC Modified: 2007-09-18 20:07 UTC
From: franzhaenel at hotmail dot com Assigned:
Status: Duplicate Package: APC (PECL)
PHP Version: 5.1.2 OS: Ubuntu 6.06 /FC3,4
Private report: No CVE-ID: None
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 [2006-06-29 08:43 UTC] franzhaenel at hotmail dot com 
Description:
------------
In the later CVS-versions apc.shm_segments doesn't work anymore. Any number above 1 is reduced to 1 segment.

PHP 5.14
Apache 1.3.36
Latest APC CVS

PHP:
./configure --with-apxs=/usr/local/apache/bin/apxs --prefix=/usr/local --with-xml --enable-bcmath --enable-calendar --enable-ftp --with-gd --with-jpeg-dir=/usr/local --with-png-dir=/usr --with-xpm-dir=/usr/X11R6 --enable-mbstring --enable-mbstr-enc-trans --enable-mbregex --with-mcrypt --enable-magic-quotes --with-mysqli --with-mysql=/usr --with-openssl --enable-discard-path --with-pear --enable-sockets --enable-track-vars --with-zlib

APC:
./configure --enable-apc --with-apxs=/usr/local/apache/bin/apxs --with-php-config=/usr/local/bin/php-config

extension=apc.so
apc.enabled = 1
apc.shm_size = 30
apc.shm_segments = 10


Reproduce code:
---------------
Just run apc.php

Expected result:
----------------
From apc.php

General Cache Information
...
Shared Memory	10 Segment(s) with 30.0 MBytes

Runtime Settings
...
apc.shm_segments	10

Actual result:
--------------
From apc.php

General Cache Information
...
Shared Memory	1 Segment(s) with 30.0 MBytes

Runtime Settings
...
apc.shm_segments	10

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2006-06-29 08:46 UTC] rasmus@php.net 
Why do you want multiple segments?
 [2006-06-29 09:34 UTC] franzhaenel at hotmail dot com 
We had problems before with too large segments so we have always used multiple 30MB segments. I checked, however, and it works fine now with a larger segment.
 [2007-02-17 23:55 UTC] shire@php.net 
duplicate of bug #8069.
 [2007-08-10 16:49 UTC] sean at awesomeplay dot com 
Why is this bug marked as a duplicate of itself?

Also, I'm experiencing this bug.  The 32MB max segment size fills up in about 3 seconds on our server.
 [2007-09-18 20:07 UTC] shire@php.net 
Sorry I must have got my bug #'s mixed up.  

Consuming all of your APC memory isn't necessarily a bug.  The shared memory size is going to be proportional to the amount of files and user variables you insert into the cache.  You should probably increase your memory size.
 
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