Re: BUG #17048: about trace_locks parameter problem

PG Bug reporting form <noreply@postgresql.org> writes:
> in the following SQL statement's result ,there is no trace_locks
> parameter.
> but in the
> documents(https://www.postgresql.org/docs/current/runtime-config-developer.html),there
> is trace_locks parameter

Note where that page says

    This parameter is only available if the LOCK_DEBUG macro was defined
    when PostgreSQL was compiled.

Most builds don't have that turned on.

            regards, tom lane