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doc: Add security information about pg_stat_activity

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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
This commit is contained in:
Peter Eisentraut 2019-02-21 19:49:27 +01:00
parent 1995552deb
commit 213eae9b8a
1 changed files with 12 additions and 0 deletions
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doc/src/sgml/monitoring.sgml
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@ -268,6 +268,18 @@ postgres 27093 0.0 0.0 30096 2752 ? Ss 11:34 0:00 postgres: ser
stated above; instead they update continuously throughout the transaction.
</para>
<para>
Some of the information in the dynamic statistics views shown in <xref
linkend="monitoring-stats-dynamic-views-table"/> is security restricted.
Ordinary users can only see all the information about their own sessions
(sessions belonging to a role that they are a member of). In rows about
other sessions, many columns will be null. Note, however, that the
existence of a session and its general properties such as its sessions user
and database are visible to all users. Superusers and members of the
built-in role <literal>pg_read_all_stats</literal> (see also <xref
linkend="default-roles"/>) can see all the information about all sessions.
</para>
<table id="monitoring-stats-dynamic-views-table">
<title>Dynamic Statistics Views</title>