What is the Memory Sharing Method of phpapc cache?

After so long, apc has not studied its code, and suddenly interested in its memory sharing method. apc is the memory cache of a client, all of its caches are stored locally on the web server. So I have the following questions: Is apc Memory Sharing Based on processes? If I use php-fpm... after so long, apc has not studied its code, and suddenly interested in its memory sharing method. apc is the memory cache of a client, all of its caches are stored locally on the web server, so I have the following questions:

Is apc Memory Sharing Based on processes? If I use php-fpm for execution, how do I share the memory among multiple fpm sub-processes, or simply do not share the memory, but independently allocate a piece of memory for caching.

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After so long, apc has not studied its code, and suddenly interested in its memory sharing method. apc is the memory cache of a client, all of its caches are stored locally on the web server, so I have the following questions:

Is apc Memory Sharing Based on processes? If I use php-fpm for execution, how do I share the memory among multiple fpm sub-processes, or simply do not share the memory, but independently allocate a piece of memory for caching.

Here (https://bugs.php.net/bug.php? Id = 57825), some people say:
Sadly (or luckily for some people here), the way php-fpm works
Makes all the processes share the same cache, since apc is loaded into the main
Process that is forked to spawn children.

But I did not do the experiment and did not verify it.

Based on the shared memory, see apc_shm.c of apc.

In PHP-FPM mode, opcode cache and user data cache of APC are shared between processes.