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 d7f2f90ba12a60a0b48a5df4dfaf8f45fa8a17b3..1f947505af32c9e8814dfa8f34d5dda86d28f2eb 100644 (file)
--- a/doc/src/sgml/monitoring.sgml
+++ b/doc/src/sgml/monitoring.sgml
@@ -1806,7 +1806,7 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
      <row>
       <entry><literal>ProcArrayGroupUpdate</literal></entry>
       <entry>Waiting for the group leader to clear the transaction ID at
-       end of a parallel operation.</entry>
+       transaction end.</entry>
      </row>
      <row>
       <entry><literal>ProcSignalBarrier</literal></entry>
@@ -1873,7 +1873,7 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
      <row>
       <entry><literal>XactGroupUpdate</literal></entry>
       <entry>Waiting for the group leader to update transaction status at
-       end of a parallel operation.</entry>
+       transaction end.</entry>
      </row>
     </tbody>
    </tgroup>