pid_file
pid_file
searchd process ID file name.
Mandatory.
PID file will be re-created (and locked) on startup. It will contain
head daemon process ID while the daemon is running, and it will be unlinked
on daemon shutdown. It's mandatory because Sphinx uses it internally
for a number of things: to check whether there already is a running instance
of searchd; to stop searchd;
to notify it that it should rotate the indexes. Can also be used for
different external automation scripts.
Example:
pid_file = /var/run/searchd.pid
