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-rw-r--r--doc/src/sgml/system-views.sgml3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/src/sgml/system-views.sgml b/doc/src/sgml/system-views.sgml
index 8e2b0a7927b..be81c2b51d2 100644
--- a/doc/src/sgml/system-views.sgml
+++ b/doc/src/sgml/system-views.sgml
@@ -2566,7 +2566,8 @@ SELECT * FROM pg_locks pl LEFT JOIN pg_prepared_xacts ppx
</para>
<para>
The time when the slot became inactive. <literal>NULL</literal> if the
- slot is currently being streamed.
+ slot is currently being streamed. If the slot becomes invalid,
+ this value will never be updated.
Note that for slots on the standby that are being synced from a
primary server (whose <structfield>synced</structfield> field is
<literal>true</literal>), the <structfield>inactive_since</structfield>