Bug #61008 [NEW]: not enough shared memory left

From: Date: Wed, 08 Feb 2012 10:32:33 +0000
Subject: Bug #61008 [NEW]: not enough shared memory left
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-167283@lists.php.net to get a copy of this message 
From:             
Operating system: CentOS 6.0
PHP version:      5.3.10
Package:          Semaphore related
Bug Type:         Bug
Bug description:not enough shared memory left

Description:
------------
i run the code below in the cmd, it tooks warning Warning: shm_put_var():
not 
enough shared memory left in 
/usr/local/agent/bin/a.php on line 15
i set the shmmax > 100M
when the process > 1 ,the error shows
when the process = 1, it seems ok.

Test script:
---------------
#!/usr/local/services/php/bin/php
<?php
// Example
$key = ftok(__FILE__, 'a');
$shm = shm_attach($key);
shm_remove($shm);
$shm = shm_attach($key);
for($i = 0; $i < 3; $i++) {
    $pid = pcntl_fork();
    if ($pid) {
        
    } else {
        //child
        $pid = posix_getpid();
        for($i = 0; $i < 100000; $i++) {
            shm_put_var($shm, $pid, microtime(true));
        }
        exit;
    }
}
?> 

Actual result:
--------------
Warning: shm_put_var(): not enough shared memory left in 
/usr/local/agent/bin/a.php on line 15


-- 
Edit bug report at https://bugs.php.net/bug.php?id=61008&edit=1
-- 
Try a snapshot (PHP 5.4):            https://bugs.php.net/fix.php?id=61008&r=trysnapshot54
Try a snapshot (PHP 5.3):            https://bugs.php.net/fix.php?id=61008&r=trysnapshot53
Try a snapshot (trunk):              https://bugs.php.net/fix.php?id=61008&r=trysnapshottrunk
Fixed in SVN:                        https://bugs.php.net/fix.php?id=61008&r=fixed
Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61008&r=needdocs
Fixed in release:                    https://bugs.php.net/fix.php?id=61008&r=alreadyfixed
Need backtrace:                      https://bugs.php.net/fix.php?id=61008&r=needtrace
Need Reproduce Script:               https://bugs.php.net/fix.php?id=61008&r=needscript
Try newer version:                   https://bugs.php.net/fix.php?id=61008&r=oldversion
Not developer issue:                 https://bugs.php.net/fix.php?id=61008&r=support
Expected behavior:                   https://bugs.php.net/fix.php?id=61008&r=notwrong
Not enough info:                     https://bugs.php.net/fix.php?id=61008&r=notenoughinfo
Submitted twice:                     https://bugs.php.net/fix.php?id=61008&r=submittedtwice
register_globals:                    https://bugs.php.net/fix.php?id=61008&r=globals
PHP 4 support discontinued:          https://bugs.php.net/fix.php?id=61008&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=61008&r=dst
IIS Stability:                       https://bugs.php.net/fix.php?id=61008&r=isapi
Install GNU Sed:                     https://bugs.php.net/fix.php?id=61008&r=gnused
Floating point limitations:          https://bugs.php.net/fix.php?id=61008&r=float
No Zend Extensions:                  https://bugs.php.net/fix.php?id=61008&r=nozend
MySQL Configuration Error:           https://bugs.php.net/fix.php?id=61008&r=mysqlcfg

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