According to our documentation, 'userlocks' were removed in PG 8.2:
http://developer.postgresql.org/pgdocs/postgres/runtime-config-developer.html
trace_userlocks (boolean)
If on, emit information about user lock usage. Output is the same as
for trace_locks, only for user locks.
User locks were removed as of PostgreSQL version 8.2. This option
currently has no effect.
This parameter is only available if the LOCK_DEBUG macro was defined
when PostgreSQL was compiled.
Should we remove this parameter and the supporting code since pre-8.2 is
now end-of-life?
--
Bruce Momjian <br...@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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