txn_idle: Document that --includeuser can be used to work around superuser checks

Close #81.

1 files changed, 4 insertions, 0 deletions

diff --git a/check_postgres.pl b/check_postgres.pl
index 84065bad6..76514448f 100755
--- a/check_postgres.pl
+++ b/check_postgres.pl
@@ -9995,6 +9995,10 @@ are given and the numbers are unsigned, the units are assumed to be seconds.
 
 This action requires Postgres 8.3 or better.
 
+Superuser privileges are required to see the queries of all users in the system;
+UNKNOWN is returned if queries cannot be checked. To only include queries by
+the connecting user, use I<--includeuser>.
+
 Example 1: Give a warning if any connection has been idle in transaction for more than 15 seconds:
 
   check_postgres_txn_idle --port=5432 --warning='15 seconds'