diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-08-01 22:45:09 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-08-01 22:45:09 +0000 |
| commit | 4a78cdeb6b598940e9d9adb92deca6494628802a (patch) | |
| tree | 0c8ad45eea297dcbc647705265eab8188fd4d8b1 /src/include/access/xlogdefs.h | |
| parent | c722628a430f347ff4a30419004cddc9795a3bb6 (diff) | |
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.
Diffstat (limited to 'src/include/access/xlogdefs.h')
| -rw-r--r-- | src/include/access/xlogdefs.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/include/access/xlogdefs.h b/src/include/access/xlogdefs.h index ceca7794325..843f078d656 100644 --- a/src/include/access/xlogdefs.h +++ b/src/include/access/xlogdefs.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/xlogdefs.h,v 1.17 2007/02/14 05:00:40 momjian Exp $ + * $PostgreSQL: pgsql/src/include/access/xlogdefs.h,v 1.18 2007/08/01 22:45:09 tgl Exp $ */ #ifndef XLOG_DEFS_H #define XLOG_DEFS_H @@ -33,6 +33,8 @@ typedef struct XLogRecPtr uint32 xrecoff; /* byte offset of location in log file */ } XLogRecPtr; +#define XLogRecPtrIsInvalid(r) ((r).xrecoff == 0) + /* * Macros for comparing XLogRecPtrs |