doc: Add security information about pg_stat_activity

Peter Eisentraut <peter@eisentraut.org>

Commit: 213eae9b8a8a6b2ce3b0e5f5dc86d4b267096398
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2019-02-21T18:49:27Z
Releases: 12.0
doc: Add security information about pg_stat_activity

Add a basic note that some columns in pg_stat_activity and related
views are not visible to all users.

Discussion: https://www.postgresql.org/message-id/3018acd9-e5d8-1e85-5ed7-47276cd77569%402ndquadrant.com

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doc/src/sgml/monitoring.sgml modified +12 −0

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