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Commit4c34788

Amit Kapila

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Log new catalog xmin candidate in LogicalIncreaseXminForSlot().

Similar to LogicalIncreaseRestartDecodingForSlot() add a debug message toLogicalIncreaseXminForSlot() reporting a new catalog_xmin candidate.This just adds additional diagnostic information during logical decoding thatcan aid debugging.Author: Ashutosh BapatReviewed-by: Masahiko Sawada, Amit KapilaDiscussion:https://postgr.es/m/CAExHW5usQWbiUz0hHOCu5twS1O9DvpcPojf6sor=8q--VUuMbA@mail.gmail.com

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src/backend/replication/logical
- logical.c

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`‎src/backend/replication/logical/logical.c`

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Original file line number	Diff line number	Diff line change
`@@ -1565,6 +1565,7 @@ LogicalIncreaseXminForSlot(XLogRecPtr current_lsn, TransactionId xmin)`
`1565`	`1565`	`{`
`1566`	`1566`	`boolupdated_xmin= false;`
`1567`	`1567`	`ReplicationSlot*slot;`
	`1568`	`+boolgot_new_xmin= false;`
`1568`	`1569`
`1569`	`1570`	`slot=MyReplicationSlot;`
`1570`	`1571`
`@@ -1602,9 +1603,19 @@ LogicalIncreaseXminForSlot(XLogRecPtr current_lsn, TransactionId xmin)`
`1602`	`1603`	`{`
`1603`	`1604`	`slot->candidate_catalog_xmin=xmin;`
`1604`	`1605`	`slot->candidate_xmin_lsn=current_lsn;`
	`1606`	`+`
	`1607`	`+/*`
	`1608`	`+ * Log new xmin at an appropriate log level after releasing the`
	`1609`	`+ * spinlock.`
	`1610`	`+ */`
	`1611`	`+got_new_xmin= true;`
`1605`	`1612`	`}`
`1606`	`1613`	`SpinLockRelease(&slot->mutex);`
`1607`	`1614`
	`1615`	`+if (got_new_xmin)`
	`1616`	`+elog(DEBUG1,"got new catalog xmin %u at %X/%X",xmin,`
	`1617`	`+LSN_FORMAT_ARGS(current_lsn));`
	`1618`	`+`
`1608`	`1619`	`/* candidate already valid with the current flush position, apply */`
`1609`	`1620`	`if (updated_xmin)`
`1610`	`1621`	`LogicalConfirmReceivedLocation(slot->data.confirmed_flush);`

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Commit4c34788

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`‎src/backend/replication/logical/logical.c`

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