Enables tracking of function call counts and time used. Specify
pl to track only procedural-language functions,
all to also track SQL and C language functions. The default is
none, which disables function statistics tracking. Only superusers and users with the appropriate
SET privilege can change this setting.
SQL-language functions that are simple enough to be inlined into the calling query will not be tracked, regardless of this setting.
Set it to 'pl' to collect stats on user-defined functions. Very useful for stored procedure performance profiling and troubleshooting.