diff options
Diffstat (limited to 'src/include/catalog/pg_control.h')
| -rw-r--r-- | src/include/catalog/pg_control.h | 45 |
1 files changed, 22 insertions, 23 deletions
diff --git a/src/include/catalog/pg_control.h b/src/include/catalog/pg_control.h index 158a4ee92b4..847ad08b2ef 100644 --- a/src/include/catalog/pg_control.h +++ b/src/include/catalog/pg_control.h @@ -8,7 +8,7 @@ * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/catalog/pg_control.h,v 1.24 2005/10/03 00:28:43 tgl Exp $ + * $PostgreSQL: pgsql/src/include/catalog/pg_control.h,v 1.25 2005/10/15 02:49:42 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -31,15 +31,14 @@ typedef struct CheckPoint { XLogRecPtr redo; /* next RecPtr available when we began to - * create CheckPoint (i.e. REDO start - * point) */ + * create CheckPoint (i.e. REDO start point) */ XLogRecPtr undo; /* first record of oldest in-progress - * transaction when we started (i.e. UNDO - * end point) */ + * transaction when we started (i.e. UNDO end + * point) */ TimeLineID ThisTimeLineID; /* current TLI */ TransactionId nextXid; /* next free XID */ Oid nextOid; /* next free OID */ - MultiXactId nextMulti; /* next free MultiXactId */ + MultiXactId nextMulti; /* next free MultiXactId */ MultiXactOffset nextMultiOffset; /* next free MultiXact offset */ time_t time; /* time stamp of checkpoint */ } CheckPoint; @@ -74,23 +73,23 @@ typedef enum DBState typedef struct ControlFileData { /* - * Unique system identifier --- to ensure we match up xlog files with - * the installation that produced them. + * Unique system identifier --- to ensure we match up xlog files with the + * installation that produced them. */ uint64 system_identifier; /* * Version identifier information. Keep these fields at the same offset, - * especially pg_control_version; they won't be real useful if they - * move around. (For historical reasons they must be 8 bytes into - * the file rather than immediately at the front.) + * especially pg_control_version; they won't be real useful if they move + * around. (For historical reasons they must be 8 bytes into the file + * rather than immediately at the front.) * * pg_control_version identifies the format of pg_control itself. * catalog_version_no identifies the format of the system catalogs. * - * There are additional version identifiers in individual files; for - * example, WAL logs contain per-page magic numbers that can serve as - * version cues for the WAL log. + * There are additional version identifiers in individual files; for example, + * WAL logs contain per-page magic numbers that can serve as version cues + * for the WAL log. */ uint32 pg_control_version; /* PG_CONTROL_VERSION */ uint32 catalog_version_no; /* see catversion.h */ @@ -108,13 +107,13 @@ typedef struct ControlFileData CheckPoint checkPointCopy; /* copy of last check point record */ /* - * This data is used to check for hardware-architecture compatibility - * of the database and the backend executable. We need not check - * endianness explicitly, since the pg_control version will surely - * look wrong to a machine of different endianness, but we do need - * to worry about MAXALIGN and floating-point format. (Note: storage - * layout nominally also depends on SHORTALIGN and INTALIGN, but in - * practice these are the same on all architectures of interest.) + * This data is used to check for hardware-architecture compatibility of + * the database and the backend executable. We need not check endianness + * explicitly, since the pg_control version will surely look wrong to a + * machine of different endianness, but we do need to worry about MAXALIGN + * and floating-point format. (Note: storage layout nominally also + * depends on SHORTALIGN and INTALIGN, but in practice these are the same + * on all architectures of interest.) * * Testing just one double value is not a very bulletproof test for * floating-point compatibility, but it will catch most cases. @@ -124,8 +123,8 @@ typedef struct ControlFileData #define FLOATFORMAT_VALUE 1234567.0 /* - * This data is used to make sure that configuration of this database - * is compatible with the backend executable. + * This data is used to make sure that configuration of this database is + * compatible with the backend executable. */ uint32 blcksz; /* block size for this DB */ uint32 relseg_size; /* blocks per segment of large relation */ |