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Fix a couple of wait event descriptions.

The descriptions for ProcArrayGroupUpdate and XactGroupUpdate claimthat these events mean we are waiting for the group leader "at endof a parallel operation," but neither pertains to paralleloperations. This commit reverts these descriptions to theirwording before commit3048898, i.e., "end of a paralleloperation" is changed to "transaction end."Author: Sameer KumarReviewed-by: Amit KapilaDiscussion:https://postgr.es/m/CAGPeHmh6UMrKQHKCmX%2B5vV5TH9P%3DKw9en3k68qEem6J%3DyrZPUA%40mail.gmail.comBackpatch-through: 13

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src/backend/utils/activity
- wait_event_names.txt

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`‎src/backend/utils/activity/wait_event_names.txt`

Lines changed: 2 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -143,7 +143,7 @@ MULTIXACT_CREATION"Waiting for a multixact creation to complete."`
`143`	`143`	`PARALLEL_BITMAP_SCAN"Waiting for parallel bitmap scan to become initialized."`
`144`	`144`	`PARALLEL_CREATE_INDEX_SCAN"Waiting for parallel <command>CREATE INDEX</command> workers to finish heap scan."`
`145`	`145`	`PARALLEL_FINISH"Waiting for parallel workers to finish computing."`
`146`		`-PROCARRAY_GROUP_UPDATE"Waiting for the group leader to clear the transaction ID atend of a parallel operation."`
	`146`	`+PROCARRAY_GROUP_UPDATE"Waiting for the group leader to clear the transaction ID attransaction end."`
`147`	`147`	`PROC_SIGNAL_BARRIER"Waiting for a barrier event to be processed by all backends."`
`148`	`148`	`PROMOTE"Waiting for standby promotion."`
`149`	`149`	`RECOVERY_CONFLICT_SNAPSHOT"Waiting for recovery conflict resolution for a vacuum cleanup."`
`@@ -158,7 +158,7 @@ SYNC_REP"Waiting for confirmation from a remote server during synchronous repli`
`158`	`158`	`WAL_RECEIVER_EXIT"Waiting for the WAL receiver to exit."`
`159`	`159`	`WAL_RECEIVER_WAIT_START"Waiting for startup process to send initial data for streaming replication."`
`160`	`160`	`WAL_SUMMARY_READY"Waiting for a new WAL summary to be generated."`
`161`		`-XACT_GROUP_UPDATE"Waiting for the group leader to update transaction status atend of a parallel operation."`
	`161`	`+XACT_GROUP_UPDATE"Waiting for the group leader to update transaction status attransaction end."`
`162`	`162`
`163`	`163`	`ABI_compatibility:`
`164`	`164`

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Commit5ff9b6b

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`‎src/backend/utils/activity/wait_event_names.txt`

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