From 4a78cdeb6b598940e9d9adb92deca6494628802a Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Wed, 1 Aug 2007 22:45:09 +0000 Subject: Support an optional asynchronous commit mode, in which we don't flush WAL before reporting a transaction committed. Data consistency is still guaranteed (unlike setting fsync = off), but a crash may lose the effects of the last few transactions. Patch by Simon, some editorialization by Tom. --- src/include/access/transam.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'src/include/access/transam.h') diff --git a/src/include/access/transam.h b/src/include/access/transam.h index b6fadcd4362..98850cc0d3b 100644 --- a/src/include/access/transam.h +++ b/src/include/access/transam.h @@ -7,13 +7,15 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/transam.h,v 1.60 2007/01/05 22:19:51 momjian Exp $ + * $PostgreSQL: pgsql/src/include/access/transam.h,v 1.61 2007/08/01 22:45:09 tgl Exp $ * *------------------------------------------------------------------------- */ #ifndef TRANSAM_H #define TRANSAM_H +#include "access/xlogdefs.h" + /* ---------------- * Special transaction ID values @@ -115,14 +117,17 @@ extern VariableCache ShmemVariableCache; extern bool TransactionIdDidCommit(TransactionId transactionId); extern bool TransactionIdDidAbort(TransactionId transactionId); extern void TransactionIdCommit(TransactionId transactionId); +extern void TransactionIdAsyncCommit(TransactionId transactionId, XLogRecPtr lsn); extern void TransactionIdAbort(TransactionId transactionId); extern void TransactionIdSubCommit(TransactionId transactionId); extern void TransactionIdCommitTree(int nxids, TransactionId *xids); +extern void TransactionIdAsyncCommitTree(int nxids, TransactionId *xids, XLogRecPtr lsn); extern void TransactionIdAbortTree(int nxids, TransactionId *xids); extern bool TransactionIdPrecedes(TransactionId id1, TransactionId id2); extern bool TransactionIdPrecedesOrEquals(TransactionId id1, TransactionId id2); extern bool TransactionIdFollows(TransactionId id1, TransactionId id2); extern bool TransactionIdFollowsOrEquals(TransactionId id1, TransactionId id2); +extern XLogRecPtr TransactionIdGetCommitLSN(TransactionId xid); /* in transam/varsup.c */ extern TransactionId GetNewTransactionId(bool isSubXact); -- cgit v1.2.3