diff options
Diffstat (limited to 'src/include/access/xlog_internal.h')
| -rw-r--r-- | src/include/access/xlog_internal.h | 76 |
1 files changed, 45 insertions, 31 deletions
diff --git a/src/include/access/xlog_internal.h b/src/include/access/xlog_internal.h index 7453dcbd0eb..22a8e63658e 100644 --- a/src/include/access/xlog_internal.h +++ b/src/include/access/xlog_internal.h @@ -85,15 +85,27 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader; #define XLogPageHeaderSize(hdr) \ (((hdr)->xlp_info & XLP_LONG_HEADER) ? SizeOfXLogLongPHD : SizeOfXLogShortPHD) -/* - * The XLOG is split into WAL segments (physical files) of the size indicated - * by XLOG_SEG_SIZE. - */ -#define XLogSegSize ((uint32) XLOG_SEG_SIZE) -#define XLogSegmentsPerXLogId (UINT64CONST(0x100000000) / XLOG_SEG_SIZE) +/* wal_segment_size can range from 1MB to 1GB */ +#define WalSegMinSize 1024 * 1024 +#define WalSegMaxSize 1024 * 1024 * 1024 +/* default number of min and max wal segments */ +#define DEFAULT_MIN_WAL_SEGS 5 +#define DEFAULT_MAX_WAL_SEGS 64 + +/* check that the given size is a valid wal_segment_size */ +#define IsPowerOf2(x) (x > 0 && ((x) & ((x)-1)) == 0) +#define IsValidWalSegSize(size) \ + (IsPowerOf2(size) && \ + ((size) >= WalSegMinSize && (size) <= WalSegMaxSize)) + +#define XLogSegmentsPerXLogId(wal_segsz_bytes) \ + (UINT64CONST(0x100000000) / (wal_segsz_bytes)) + +#define XLogSegNoOffsetToRecPtr(segno, offset, dest, wal_segsz_bytes) \ + (dest) = (segno) * (wal_segsz_bytes) + (offset) -#define XLogSegNoOffsetToRecPtr(segno, offset, dest) \ - (dest) = (segno) * XLOG_SEG_SIZE + (offset) +#define XLogSegmentOffset(xlogptr, wal_segsz_bytes) \ + ((xlogptr) & ((wal_segsz_bytes) - 1)) /* * Compute a segment number from an XLogRecPtr. @@ -103,11 +115,11 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader; * for deciding which segment to write given a pointer to a record end, * for example. */ -#define XLByteToSeg(xlrp, logSegNo) \ - logSegNo = (xlrp) / XLogSegSize +#define XLByteToSeg(xlrp, logSegNo, wal_segsz_bytes) \ + logSegNo = (xlrp) / (wal_segsz_bytes) -#define XLByteToPrevSeg(xlrp, logSegNo) \ - logSegNo = ((xlrp) - 1) / XLogSegSize +#define XLByteToPrevSeg(xlrp, logSegNo, wal_segsz_bytes) \ + logSegNo = ((xlrp) - 1) / (wal_segsz_bytes) /* * Is an XLogRecPtr within a particular XLOG segment? @@ -115,11 +127,11 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader; * For XLByteInSeg, do the computation at face value. For XLByteInPrevSeg, * a boundary byte is taken to be in the previous segment. */ -#define XLByteInSeg(xlrp, logSegNo) \ - (((xlrp) / XLogSegSize) == (logSegNo)) +#define XLByteInSeg(xlrp, logSegNo, wal_segsz_bytes) \ + (((xlrp) / (wal_segsz_bytes)) == (logSegNo)) -#define XLByteInPrevSeg(xlrp, logSegNo) \ - ((((xlrp) - 1) / XLogSegSize) == (logSegNo)) +#define XLByteInPrevSeg(xlrp, logSegNo, wal_segsz_bytes) \ + ((((xlrp) - 1) / (wal_segsz_bytes)) == (logSegNo)) /* Check if an XLogRecPtr value is in a plausible range */ #define XRecOffIsValid(xlrp) \ @@ -140,10 +152,10 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader; /* Length of XLog file name */ #define XLOG_FNAME_LEN 24 -#define XLogFileName(fname, tli, logSegNo) \ +#define XLogFileName(fname, tli, logSegNo, wal_segsz_bytes) \ snprintf(fname, MAXFNAMELEN, "%08X%08X%08X", tli, \ - (uint32) ((logSegNo) / XLogSegmentsPerXLogId), \ - (uint32) ((logSegNo) % XLogSegmentsPerXLogId)) + (uint32) ((logSegNo) / XLogSegmentsPerXLogId(wal_segsz_bytes)), \ + (uint32) ((logSegNo) % XLogSegmentsPerXLogId(wal_segsz_bytes))) #define XLogFileNameById(fname, tli, log, seg) \ snprintf(fname, MAXFNAMELEN, "%08X%08X%08X", tli, log, seg) @@ -162,18 +174,18 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader; strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN && \ strcmp((fname) + XLOG_FNAME_LEN, ".partial") == 0) -#define XLogFromFileName(fname, tli, logSegNo) \ +#define XLogFromFileName(fname, tli, logSegNo, wal_segsz_bytes) \ do { \ uint32 log; \ uint32 seg; \ sscanf(fname, "%08X%08X%08X", tli, &log, &seg); \ - *logSegNo = (uint64) log * XLogSegmentsPerXLogId + seg; \ + *logSegNo = (uint64) log * XLogSegmentsPerXLogId(wal_segsz_bytes) + seg; \ } while (0) -#define XLogFilePath(path, tli, logSegNo) \ - snprintf(path, MAXPGPATH, XLOGDIR "/%08X%08X%08X", tli, \ - (uint32) ((logSegNo) / XLogSegmentsPerXLogId), \ - (uint32) ((logSegNo) % XLogSegmentsPerXLogId)) +#define XLogFilePath(path, tli, logSegNo, wal_segsz_bytes) \ + snprintf(path, MAXPGPATH, XLOGDIR "/%08X%08X%08X", tli, \ + (uint32) ((logSegNo) / XLogSegmentsPerXLogId(wal_segsz_bytes)), \ + (uint32) ((logSegNo) % XLogSegmentsPerXLogId(wal_segsz_bytes))) #define TLHistoryFileName(fname, tli) \ snprintf(fname, MAXFNAMELEN, "%08X.history", tli) @@ -189,20 +201,22 @@ typedef XLogLongPageHeaderData *XLogLongPageHeader; #define StatusFilePath(path, xlog, suffix) \ snprintf(path, MAXPGPATH, XLOGDIR "/archive_status/%s%s", xlog, suffix) -#define BackupHistoryFileName(fname, tli, logSegNo, offset) \ +#define BackupHistoryFileName(fname, tli, logSegNo, startpoint, wal_segsz_bytes) \ snprintf(fname, MAXFNAMELEN, "%08X%08X%08X.%08X.backup", tli, \ - (uint32) ((logSegNo) / XLogSegmentsPerXLogId), \ - (uint32) ((logSegNo) % XLogSegmentsPerXLogId), offset) + (uint32) ((logSegNo) / XLogSegmentsPerXLogId(wal_segsz_bytes)), \ + (uint32) ((logSegNo) % XLogSegmentsPerXLogId(wal_segsz_bytes)), \ + (uint32) (XLogSegmentOffset(startpoint, wal_segsz_bytes))) #define IsBackupHistoryFileName(fname) \ (strlen(fname) > XLOG_FNAME_LEN && \ strspn(fname, "0123456789ABCDEF") == XLOG_FNAME_LEN && \ strcmp((fname) + strlen(fname) - strlen(".backup"), ".backup") == 0) -#define BackupHistoryFilePath(path, tli, logSegNo, offset) \ +#define BackupHistoryFilePath(path, tli, logSegNo, startpoint, wal_segsz_bytes) \ snprintf(path, MAXPGPATH, XLOGDIR "/%08X%08X%08X.%08X.backup", tli, \ - (uint32) ((logSegNo) / XLogSegmentsPerXLogId), \ - (uint32) ((logSegNo) % XLogSegmentsPerXLogId), offset) + (uint32) ((logSegNo) / XLogSegmentsPerXLogId(wal_segsz_bytes)), \ + (uint32) ((logSegNo) % XLogSegmentsPerXLogId(wal_segsz_bytes)), \ + (uint32) (XLogSegmentOffset((startpoint), wal_segsz_bytes))) /* * Information logged when we detect a change in one of the parameters |