Apache Reference: mod_perl, PerlRestartHandler

PerlRestartHandler

Perl Handler for the Pseudo-API Phase of Server Restarts
Syntax: PerlRestartHandler handler [...]
Example: PerlRestartHandler MyRestart::handler
Since: Apache 1.2

This special Perl handler does not correspond to a real Apache API phase. Instead, it configures handler to operate when the Apache server is restarted. You then have the chance to step in and perform any cleanup required to tweak the Perl interpreter.