If you’re getting an error like this one below on Windows PHP commandline make sure that you are not running an apache server that uses apc on the same machine!

[apc-error] apc_shm_create: shmget(0, 8388608, 658) failed: No error. It is possible that the chosen SHM segment size is higher than the operation system allows. Linux has usually a default limit of 32MB per segment.

This was hard to figure! Tested with PHP 5.2.5, APC 3.1.0-dev.

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