Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Semaphore Configuration Options

Name	Default	Changeable	Changelog
sysvshm.init_mem	10000	PHP_INI_SYSTEM

For further details and definitions of the PHP_INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation of the configuration directives.

sysvshm.init_mem int

A default size of the shared memory segment.