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7 | 7 | * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group |
8 | 8 | * Portions Copyright (c) 1994, Regents of the University of California |
9 | 9 | * |
10 | | - * $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.379 2010/02/26 02:00:35 momjian Exp $ |
| 10 | + * $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.380 2010/03/10 02:04:48 itagaki Exp $ |
11 | 11 | * |
12 | 12 | *------------------------------------------------------------------------- |
13 | 13 | */ |
@@ -7897,7 +7897,7 @@ pg_start_backup(PG_FUNCTION_ARGS) |
7897 | 7897 | * REDO pointer. The oldest point in WAL that would be needed to |
7898 | 7898 | * restore starting from the checkpoint is precisely the REDO pointer. |
7899 | 7899 | */ |
7900 | | -LWLockAcquire(ControlFileLock,LW_EXCLUSIVE); |
| 7900 | +LWLockAcquire(ControlFileLock,LW_SHARED); |
7901 | 7901 | checkpointloc=ControlFile->checkPoint; |
7902 | 7902 | startpoint=ControlFile->checkPointCopy.redo; |
7903 | 7903 | LWLockRelease(ControlFileLock); |
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