what is APC internal debugging?

Question

I got a prompt with Enable internal debugging in APC [no]:. While installing APC.

• what is APC internal debugging?
• Is is better to keep it enabled?

Tried to do a search but couldn't find an answer!

Answer 1

This message comes from the pear package of APC. If you set it, APC will be configured with the --enable-apc-debug flag, which means the macro __DEBUG_APC__ is set in the C source code.

This macro will add additional printfs about APC's internal state. Naturally, these are only useful in a testing environment, and should never be activated on a public webserver.

Unless you're editing APC's source code, or tracking down an extremely low-level problem in APC (which is unlikely), you should answer no. You can just hit Enter.