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Make RecordTransactionCommit() respect wal_level.

Since the only purpose of WAL-loggin SharedInvalidationMessages is to supportHot Standby operation, they needn't be included when wal_level < hot_standby.Back-patch to 9.0.Review by Heikki Linnakanagas and Fujii Masao.

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src/backend/access/transam
- xact.c

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`‎src/backend/access/transam/xact.c`

Lines changed: 6 additions & 5 deletions

Original file line number	Diff line number	Diff line change
`@@ -10,7 +10,7 @@`
`10`	`10`	`*`
`11`	`11`	`*`
`12`	`12`	`* IDENTIFICATION`
`13`		`- * $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.296 2010/08/12 23:24:53 rhaas Exp $`
	`13`	`+ * $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.297 2010/08/13 15:42:21 rhaas Exp $`
`14`	`14`	`*`
`15`	`15`	`*-------------------------------------------------------------------------`
`16`	`16`	`*/`
`@@ -915,15 +915,16 @@ RecordTransactionCommit(void)`
`915`	`915`	`boolhaveNonTemp;`
`916`	`916`	`intnchildren;`
`917`	`917`	`TransactionId*children;`
`918`		`-intnmsgs;`
	`918`	`+intnmsgs=0;`
`919`	`919`	`SharedInvalidationMessage*invalMessages=NULL;`
`920`		`-boolRelcacheInitFileInval;`
	`920`	`+boolRelcacheInitFileInval= false;`
`921`	`921`
`922`	`922`	`/* Get data needed for commit record */`
`923`	`923`	`nrels=smgrGetPendingDeletes(true,&rels,&haveNonTemp);`
`924`	`924`	`nchildren=xactGetCommittedChildren(&children);`
`925`		`-nmsgs=xactGetCommittedInvalidationMessages(&invalMessages,`
`926`		`-&RelcacheInitFileInval);`
	`925`	`+if (XLogStandbyInfoActive())`
	`926`	`+nmsgs=xactGetCommittedInvalidationMessages(&invalMessages,`
	`927`	`+&RelcacheInitFileInval);`
`927`	`928`
`928`	`929`	`/*`
`929`	`930`	`* If we haven't been assigned an XID yet, we neither can, nor do we want`

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Commit95ef7cd

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`‎src/backend/access/transam/xact.c`

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