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Add DEBUG1-level logging of checkpoint start and end. Also, reduce the

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'recycled log files' and 'removed log files' messages from DEBUG1 to
DEBUG2, replacing them with a count of files added/removed/recycled in
the checkpoint end message, as per suggestion from Simon Riggs.
This commit is contained in:
Tom Lane 2004-10-29 00:16:08 +00:00
parent fe2bfa6332
commit ee69be44d5
1 changed files with 34 additions and 10 deletions
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44
src/backend/access/transam/xlog.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.174 2004/10/14 20:23:43 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.175 2004/10/29 00:16:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -442,8 +442,9 @@ static int XLogFileOpen(uint32 log, uint32 seg);
static int XLogFileRead(uint32 log, uint32 seg, int emode);
static bool RestoreArchivedFile(char *path, const char *xlogfname,
const char *recovername, off_t expectedSize);
static void PreallocXlogFiles(XLogRecPtr endptr);
static void MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr);
static int PreallocXlogFiles(XLogRecPtr endptr);
static void MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr,
int *nsegsremoved, int *nsegsrecycled);
static XLogRecord *ReadRecord(XLogRecPtr *RecPtr, int emode);
static bool ValidXLOGHeader(XLogPageHeader hdr, int emode);
static XLogRecord *ReadCheckpointRecord(XLogRecPtr RecPtr, int whichChkpt);
@ -2067,9 +2068,10 @@ RestoreArchivedFile(char *path, const char *xlogfname,
* Preallocate log files beyond the specified log endpoint, according to
* the XLOGfile user parameter.
*/
static void
static int
PreallocXlogFiles(XLogRecPtr endptr)
{
int nsegsadded = 0;
uint32 _logId;
uint32 _logSeg;
int lf;
@ -2083,7 +2085,10 @@ PreallocXlogFiles(XLogRecPtr endptr)
use_existent = true;
lf = XLogFileInit(_logId, _logSeg, &use_existent, true);
close(lf);
if (!use_existent)
nsegsadded++;
}
return nsegsadded;
}
/*
@ -2093,7 +2098,8 @@ PreallocXlogFiles(XLogRecPtr endptr)
* whether we want to recycle rather than delete no-longer-wanted log files.
*/
static void
MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr)
MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr,
int *nsegsremoved, int *nsegsrecycled)
{
uint32 endlogId;
uint32 endlogSeg;
@ -2102,6 +2108,9 @@ MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr)
char lastoff[MAXFNAMELEN];
char path[MAXPGPATH];
*nsegsremoved = 0;
*nsegsrecycled = 0;
XLByteToPrevSeg(endptr, endlogId, endlogSeg);
xldir = AllocateDir(XLogDir);
@ -2152,17 +2161,19 @@ MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr)
true, XLOGfileslop,
true))
{
ereport(DEBUG1,
ereport(DEBUG2,
(errmsg("recycled transaction log file \"%s\"",
xlde->d_name)));
(*nsegsrecycled)++;
}
else
{
/* No need for any more future segments... */
ereport(DEBUG1,
ereport(DEBUG2,
(errmsg("removing transaction log file \"%s\"",
xlde->d_name)));
unlink(path);
(*nsegsremoved)++;
}
XLogArchiveCleanup(xlde->d_name);
@ -4470,7 +4481,7 @@ StartupXLOG(void)
/*
* Preallocate additional log files, if wanted.
*/
PreallocXlogFiles(EndOfLog);
(void) PreallocXlogFiles(EndOfLog);
/*
* Okay, we're officially UP.
@ -4694,6 +4705,9 @@ CreateCheckPoint(bool shutdown, bool force)
uint32 freespace;
uint32 _logId;
uint32 _logSeg;
int nsegsadded = 0;
int nsegsremoved = 0;
int nsegsrecycled = 0;
/*
* Acquire CheckpointLock to ensure only one checkpoint happens at a
@ -4861,6 +4875,10 @@ CreateCheckPoint(bool shutdown, bool force)
*/
END_CRIT_SECTION();
if (!shutdown)
ereport(DEBUG1,
(errmsg("checkpoint starting")));
CheckPointCLOG();
CheckPointSUBTRANS();
FlushBufferPool();
@ -4936,7 +4954,8 @@ CreateCheckPoint(bool shutdown, bool force)
if (_logId || _logSeg)
{
PrevLogSeg(_logId, _logSeg);
MoveOfflineLogs(_logId, _logSeg, recptr);
MoveOfflineLogs(_logId, _logSeg, recptr,
&nsegsremoved, &nsegsrecycled);
}
/*
@ -4945,7 +4964,7 @@ CreateCheckPoint(bool shutdown, bool force)
* necessary.)
*/
if (!shutdown)
PreallocXlogFiles(recptr);
nsegsadded = PreallocXlogFiles(recptr);
/*
* Truncate pg_subtrans if possible. We can throw away all data
@ -4957,6 +4976,11 @@ CreateCheckPoint(bool shutdown, bool force)
if (!InRecovery)
TruncateSUBTRANS(GetOldestXmin(true));
if (!shutdown)
ereport(DEBUG1,
(errmsg("checkpoint complete; %d transaction log file(s) added, %d removed, %d recycled",
nsegsadded, nsegsremoved, nsegsrecycled)));
LWLockRelease(CheckpointLock);
}