Fix a couple of wait event descriptions.

The descriptions for ProcArrayGroupUpdate and XactGroupUpdate claim
that these events mean we are waiting for the group leader "at end
of a parallel operation," but neither pertains to parallel
operations.  This commit reverts these descriptions to their
wording before commit 3048898e73, i.e., "end of a parallel
operation" is changed to "transaction end."

Author: Sameer Kumar
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/CAGPeHmh6UMrKQHKCmX%2B5vV5TH9P%3DKw9en3k68qEem6J%3DyrZPUA%40mail.gmail.com
Backpatch-through: 13

diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
index 414be8a47e395e7ecaaeb3196eebb6528311a1d7..4b71a9f484a24f1b844b6766f9bf1d840adf3758 100644 (file)
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -1742,7 +1742,7 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
      
       ProcArrayGroupUpdate
       Waiting for the group leader to clear the transaction ID at
-       end of a parallel operation.
+       transaction end.
      
      
       ProcSignalBarrier
@@ -1799,7 +1799,7 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
      
       XactGroupUpdate
       Waiting for the group leader to update transaction status at
-       end of a parallel operation.
+       transaction end.