diff options
Diffstat (limited to 'src/backend')
| -rw-r--r-- | src/backend/access/transam/xlog.c | 21 | ||||
| -rw-r--r-- | src/backend/replication/walsender.c | 2 |
2 files changed, 13 insertions, 10 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c index a55c2ffbcfe..1b90f9ae72e 100644 --- a/src/backend/access/transam/xlog.c +++ b/src/backend/access/transam/xlog.c @@ -363,7 +363,7 @@ typedef struct XLogCtlData uint32 ckptXidEpoch; /* nextXID & epoch of latest checkpoint */ TransactionId ckptXid; XLogRecPtr asyncXactLSN; /* LSN of newest async commit/abort */ - uint32 lastRemovedLog; /* latest removed/recycled XLOG segment + 1 */ + uint32 lastRemovedLog; /* latest removed/recycled XLOG segment */ uint32 lastRemovedSeg; /* Protected by WALWriteLock: */ @@ -3210,9 +3210,7 @@ PreallocXlogFiles(XLogRecPtr endptr) } /* - * Get the log/seg of the first WAL segment that has not been removed or - * recycled. In other words, the log/seg of the last removed/recycled WAL - * segment + 1. + * Get the log/seg of the latest removed or recycled WAL segment. * Returns 0/0 if no WAL segments have been removed since startup. */ void @@ -3241,7 +3239,6 @@ UpdateLastRemovedPtr(char *filename) seg; XLogFromFileName(filename, &tli, &log, &seg); - NextLogSeg(log, seg); SpinLockAcquire(&xlogctl->info_lck); if (log > xlogctl->lastRemovedLog || @@ -4894,9 +4891,15 @@ BootStrapXLOG(void) page = (XLogPageHeader) TYPEALIGN(ALIGNOF_XLOG_BUFFER, buffer); memset(page, 0, XLOG_BLCKSZ); - /* Set up information for the initial checkpoint record */ + /* + * Set up information for the initial checkpoint record + * + * The initial checkpoint record is written to the beginning of the + * WAL segment with logid=0 logseg=1. The very first WAL segment, 0/0, is + * not used, so that we can use 0/0 to mean "before any valid WAL segment". + */ checkPoint.redo.xlogid = 0; - checkPoint.redo.xrecoff = SizeOfXLogLongPHD; + checkPoint.redo.xrecoff = XLogSegSize + SizeOfXLogLongPHD; checkPoint.ThisTimeLineID = ThisTimeLineID; checkPoint.nextXidEpoch = 0; checkPoint.nextXid = FirstNormalTransactionId; @@ -4919,7 +4922,7 @@ BootStrapXLOG(void) page->xlp_info = XLP_LONG_HEADER; page->xlp_tli = ThisTimeLineID; page->xlp_pageaddr.xlogid = 0; - page->xlp_pageaddr.xrecoff = 0; + page->xlp_pageaddr.xrecoff = XLogSegSize; longpage = (XLogLongPageHeader) page; longpage->xlp_sysid = sysidentifier; longpage->xlp_seg_size = XLogSegSize; @@ -4945,7 +4948,7 @@ BootStrapXLOG(void) /* Create first XLOG segment file */ use_existent = false; - openLogFile = XLogFileInit(0, 0, &use_existent, false); + openLogFile = XLogFileInit(0, 1, &use_existent, false); /* Write the first page with the initial record */ errno = 0; diff --git a/src/backend/replication/walsender.c b/src/backend/replication/walsender.c index f3775ac72da..2a16888b0ff 100644 --- a/src/backend/replication/walsender.c +++ b/src/backend/replication/walsender.c @@ -630,7 +630,7 @@ XLogRead(char *buf, XLogRecPtr recptr, Size nbytes) XLogGetLastRemoved(&lastRemovedLog, &lastRemovedSeg); XLByteToSeg(startRecPtr, log, seg); if (log < lastRemovedLog || - (log == lastRemovedLog && seg < lastRemovedSeg)) + (log == lastRemovedLog && seg <= lastRemovedSeg)) { char filename[MAXFNAMELEN]; |