static void XLogFileClose(void);
static void PreallocXlogFiles(XLogRecPtr endptr);
static void RemoveTempXlogFiles(void);
-static void RemoveOldXlogFiles(XLogSegNo segno, XLogRecPtr PriorRedoPtr, XLogRecPtr endptr);
-static void RemoveXlogFile(const char *segname, XLogRecPtr PriorRedoPtr, XLogRecPtr endptr);
+static void RemoveOldXlogFiles(XLogSegNo segno, XLogRecPtr RedoRecPtr, XLogRecPtr endptr);
+static void RemoveXlogFile(const char *segname, XLogRecPtr RedoRecPtr, XLogRecPtr endptr);
static void UpdateLastRemovedPtr(char *filename);
static void ValidateXLOGDirectoryStructure(void);
static void CleanupBackupHistory(void);
* XLOG segments? Returns the highest segment that should be preallocated.
*/
static XLogSegNo
-XLOGfileslop(XLogRecPtr PriorRedoPtr)
+XLOGfileslop(XLogRecPtr RedoRecPtr)
{
XLogSegNo minSegNo;
XLogSegNo maxSegNo;
* correspond to. Always recycle enough segments to meet the minimum, and
* remove enough segments to stay below the maximum.
*/
- minSegNo = PriorRedoPtr / wal_segment_size +
+ minSegNo = RedoRecPtr / wal_segment_size +
ConvertToXSegs(min_wal_size_mb, wal_segment_size) - 1;
- maxSegNo = PriorRedoPtr / wal_segment_size +
+ maxSegNo = RedoRecPtr / wal_segment_size +
ConvertToXSegs(max_wal_size_mb, wal_segment_size) - 1;
/*
/* add 10% for good measure. */
distance *= 1.10;
- recycleSegNo = (XLogSegNo) ceil(((double) PriorRedoPtr + distance) /
+ recycleSegNo = (XLogSegNo) ceil(((double) RedoRecPtr + distance) /
wal_segment_size);
if (recycleSegNo < minSegNo)
/*
* Recycle or remove all log files older or equal to passed segno.
*
- * endptr is current (or recent) end of xlog, and PriorRedoRecPtr is the
- * redo pointer of the previous checkpoint. These are used to determine
+ * endptr is current (or recent) end of xlog, and RedoRecPtr is the
+ * redo pointer of the last checkpoint. These are used to determine
* whether we want to recycle rather than delete no-longer-wanted log files.
*/
static void
-RemoveOldXlogFiles(XLogSegNo segno, XLogRecPtr PriorRedoPtr, XLogRecPtr endptr)
+RemoveOldXlogFiles(XLogSegNo segno, XLogRecPtr RedoRecPtr, XLogRecPtr endptr)
{
DIR *xldir;
struct dirent *xlde;
/* Update the last removed location in shared memory first */
UpdateLastRemovedPtr(xlde->d_name);
- RemoveXlogFile(xlde->d_name, PriorRedoPtr, endptr);
+ RemoveXlogFile(xlde->d_name, RedoRecPtr, endptr);
}
}
}
/*
* Recycle or remove a log file that's no longer needed.
*
- * endptr is current (or recent) end of xlog, and PriorRedoRecPtr is the
- * redo pointer of the previous checkpoint. These are used to determine
+ * endptr is current (or recent) end of xlog, and RedoRecPtr is the
+ * redo pointer of the last checkpoint. These are used to determine
* whether we want to recycle rather than delete no-longer-wanted log files.
- * If PriorRedoRecPtr is not known, pass invalid, and the function will
- * recycle, somewhat arbitrarily, 10 future segments.
+ * If RedoRecPtr is not known, pass invalid, and the function will recycle,
+ * somewhat arbitrarily, 10 future segments.
*/
static void
-RemoveXlogFile(const char *segname, XLogRecPtr PriorRedoPtr, XLogRecPtr endptr)
+RemoveXlogFile(const char *segname, XLogRecPtr RedoRecPtr, XLogRecPtr endptr)
{
char path[MAXPGPATH];
#ifdef WIN32
* Initialize info about where to try to recycle to.
*/
XLByteToSeg(endptr, endlogSegNo, wal_segment_size);
- if (PriorRedoPtr == InvalidXLogRecPtr)
+ if (RedoRecPtr == InvalidXLogRecPtr)
recycleSegNo = endlogSegNo + 10;
else
- recycleSegNo = XLOGfileslop(PriorRedoPtr);
+ recycleSegNo = XLOGfileslop(RedoRecPtr);
snprintf(path, MAXPGPATH, XLOGDIR "/%s", segname);
bool shutdown;
CheckPoint checkPoint;
XLogRecPtr recptr;
+ XLogSegNo _logSegNo;
XLogCtlInsert *Insert = &XLogCtl->Insert;
uint32 freespace;
XLogRecPtr PriorRedoPtr;
smgrpostckpt();
/*
- * Delete old log files and recycle them
+ * Update the average distance between checkpoints if the prior checkpoint
+ * exists.
*/
if (PriorRedoPtr != InvalidXLogRecPtr)
- {
- XLogSegNo _logSegNo;
-
- /* Update the average distance between checkpoints. */
UpdateCheckPointDistanceEstimate(RedoRecPtr - PriorRedoPtr);
- /* Trim from the last checkpoint, not the last - 1 */
- XLByteToSeg(RedoRecPtr, _logSegNo, wal_segment_size);
- KeepLogSeg(recptr, &_logSegNo);
- _logSegNo--;
- RemoveOldXlogFiles(_logSegNo, PriorRedoPtr, recptr);
- }
+ /*
+ * Delete old log files, those no longer needed for last checkpoint to
+ * prevent the disk holding the xlog from growing full.
+ */
+ XLByteToSeg(RedoRecPtr, _logSegNo, wal_segment_size);
+ KeepLogSeg(recptr, &_logSegNo);
+ _logSegNo--;
+ RemoveOldXlogFiles(_logSegNo, RedoRecPtr, recptr);
/*
* Make more log segments if needed. (Do this after recycling old log
XLogRecPtr lastCheckPointEndPtr;
CheckPoint lastCheckPoint;
XLogRecPtr PriorRedoPtr;
+ XLogRecPtr receivePtr;
+ XLogRecPtr replayPtr;
+ TimeLineID replayTLI;
+ XLogRecPtr endptr;
+ XLogSegNo _logSegNo;
TimestampTz xtime;
/*
LWLockRelease(ControlFileLock);
/*
- * Delete old log files (those no longer needed even for previous
- * checkpoint/restartpoint) to prevent the disk holding the xlog from
- * growing full.
+ * Update the average distance between checkpoints/restartpoints if the
+ * prior checkpoint exists.
*/
if (PriorRedoPtr != InvalidXLogRecPtr)
- {
- XLogRecPtr receivePtr;
- XLogRecPtr replayPtr;
- TimeLineID replayTLI;
- XLogRecPtr endptr;
- XLogSegNo _logSegNo;
-
- /* Update the average distance between checkpoints/restartpoints. */
UpdateCheckPointDistanceEstimate(RedoRecPtr - PriorRedoPtr);
- XLByteToSeg(PriorRedoPtr, _logSegNo, wal_segment_size);
-
- /*
- * Get the current end of xlog replayed or received, whichever is
- * later.
- */
- receivePtr = GetWalRcvWriteRecPtr(NULL, NULL);
- replayPtr = GetXLogReplayRecPtr(&replayTLI);
- endptr = (receivePtr < replayPtr) ? replayPtr : receivePtr;
+ /*
+ * Delete old log files, those no longer needed for last restartpoint to
+ * prevent the disk holding the xlog from growing full.
+ */
+ XLByteToSeg(RedoRecPtr, _logSegNo, wal_segment_size);
- KeepLogSeg(endptr, &_logSegNo);
- _logSegNo--;
+ /*
+ * Retreat _logSegNo using the current end of xlog replayed or received,
+ * whichever is later.
+ */
+ receivePtr = GetWalRcvWriteRecPtr(NULL, NULL);
+ replayPtr = GetXLogReplayRecPtr(&replayTLI);
+ endptr = (receivePtr < replayPtr) ? replayPtr : receivePtr;
+ KeepLogSeg(endptr, &_logSegNo);
+ _logSegNo--;
- /*
- * Try to recycle segments on a useful timeline. If we've been
- * promoted since the beginning of this restartpoint, use the new
- * timeline chosen at end of recovery (RecoveryInProgress() sets
- * ThisTimeLineID in that case). If we're still in recovery, use the
- * timeline we're currently replaying.
- *
- * There is no guarantee that the WAL segments will be useful on the
- * current timeline; if recovery proceeds to a new timeline right
- * after this, the pre-allocated WAL segments on this timeline will
- * not be used, and will go wasted until recycled on the next
- * restartpoint. We'll live with that.
- */
- if (RecoveryInProgress())
- ThisTimeLineID = replayTLI;
+ /*
+ * Try to recycle segments on a useful timeline. If we've been promoted
+ * since the beginning of this restartpoint, use the new timeline chosen
+ * at end of recovery (RecoveryInProgress() sets ThisTimeLineID in that
+ * case). If we're still in recovery, use the timeline we're currently
+ * replaying.
+ *
+ * There is no guarantee that the WAL segments will be useful on the
+ * current timeline; if recovery proceeds to a new timeline right after
+ * this, the pre-allocated WAL segments on this timeline will not be used,
+ * and will go wasted until recycled on the next restartpoint. We'll live
+ * with that.
+ */
+ if (RecoveryInProgress())
+ ThisTimeLineID = replayTLI;
- RemoveOldXlogFiles(_logSegNo, PriorRedoPtr, endptr);
+ RemoveOldXlogFiles(_logSegNo, RedoRecPtr, endptr);
- /*
- * Make more log segments if needed. (Do this after recycling old log
- * segments, since that may supply some of the needed files.)
- */
- PreallocXlogFiles(endptr);
+ /*
+ * Make more log segments if needed. (Do this after recycling old log
+ * segments, since that may supply some of the needed files.)
+ */
+ PreallocXlogFiles(endptr);
- /*
- * ThisTimeLineID is normally not set when we're still in recovery.
- * However, recycling/preallocating segments above needed
- * ThisTimeLineID to determine which timeline to install the segments
- * on. Reset it now, to restore the normal state of affairs for
- * debugging purposes.
- */
- if (RecoveryInProgress())
- ThisTimeLineID = 0;
- }
+ /*
+ * ThisTimeLineID is normally not set when we're still in recovery.
+ * However, recycling/preallocating segments above needed ThisTimeLineID
+ * to determine which timeline to install the segments on. Reset it now,
+ * to restore the normal state of affairs for debugging purposes.
+ */
+ if (RecoveryInProgress())
+ ThisTimeLineID = 0;
/*
* Truncate pg_subtrans if possible. We can throw away all data before
projects / postgresql / commitdiff