Tweak some comments related to variable-numbered stats in pgstat.c

These comments referred to database objects, but depending on the stats
kind dealt with this may not be true.

Issues found while reviewing a different patch in this area.

Discussion: https://postgr.es/m/ZtXR+CtkEVVE/LHF@ip-10-97-1-34.eu-west-3.compute.internal

diff --git a/src/backend/utils/activity/pgstat.c b/src/backend/utils/activity/pgstat.c
index 18b7d9b47d6cbc298c10d8babc39a0c4549f6762..b4e357c8a42227ab4b4b6993e14b65259200fa7c 100644 (file)
--- a/src/backend/utils/activity/pgstat.c
+++ b/src/backend/utils/activity/pgstat.c
@@ -768,7 +768,7 @@ pgstat_report_stat(bool force)
 
        partial_flush = false;
 
-       /* flush database / relation / function / ... stats */
+       /* flush of variable-numbered stats */
        partial_flush |= pgstat_flush_pending_entries(nowait);
 
        /* flush of fixed-numbered stats */
@@ -1342,8 +1342,7 @@ pgstat_delete_pending_entry(PgStat_EntryRef *entry_ref)
 }
 
 /*
- * Flush out pending stats for database objects (databases, relations,
- * functions).
+ * Flush out pending variable-numbered stats.
  */
 static bool
 pgstat_flush_pending_entries(bool nowait)