diff options
Diffstat (limited to 'src/include/access/xlog.h')
| -rw-r--r-- | src/include/access/xlog.h | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h index a1be9bacf3b..cb2e6e523df 100644 --- a/src/include/access/xlog.h +++ b/src/include/access/xlog.h @@ -6,7 +6,7 @@ * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: xlog.h,v 1.41 2003/02/21 00:06:22 tgl Exp $ + * $Id: xlog.h,v 1.42 2003/02/22 00:45:05 tgl Exp $ */ #ifndef XLOG_H #define XLOG_H @@ -56,17 +56,18 @@ typedef struct XLogRecord #define XLR_INFO_MASK 0x0F /* - * We support backup of up to 2 disk blocks per XLOG record (could support - * more if we cared to dedicate more xl_info bits for this purpose; currently - * do not need more than 2 anyway). If we backed up any disk blocks then we - * use flag bits in xl_info to signal it. + * If we backed up any disk blocks with the XLOG record, we use flag bits in + * xl_info to signal it. We support backup of up to 3 disk blocks per XLOG + * record. (Could support 4 if we cared to dedicate all the xl_info bits for + * this purpose; currently bit 0 of xl_info is unused and available.) */ -#define XLR_BKP_BLOCK_MASK 0x0C /* all info bits used for bkp +#define XLR_BKP_BLOCK_MASK 0x0E /* all info bits used for bkp * blocks */ -#define XLR_MAX_BKP_BLOCKS 2 +#define XLR_MAX_BKP_BLOCKS 3 #define XLR_SET_BKP_BLOCK(iblk) (0x08 >> (iblk)) #define XLR_BKP_BLOCK_1 XLR_SET_BKP_BLOCK(0) /* 0x08 */ #define XLR_BKP_BLOCK_2 XLR_SET_BKP_BLOCK(1) /* 0x04 */ +#define XLR_BKP_BLOCK_3 XLR_SET_BKP_BLOCK(2) /* 0x02 */ /* * Sometimes we log records which are out of transaction control. |