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New CHECKPOINT command.

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Auto removing of offline log files and creating new file
at checkpoint time.
This commit is contained in:
Vadim B. Mikheev
2000-11-05 22:50:21 +00:00
parent 7267fdd7a3
commit f0e37a8531
11 changed files with 274 additions and 39 deletions
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39
src/backend/storage/ipc/sinval.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/sinval.c,v 1.21 2000/04/12 17:15:37 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/ipc/sinval.c,v 1.22 2000/11/05 22:50:20 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@@ -369,3 +369,40 @@ GetSnapshotData(bool serializable)
snapshot->xcnt = count;
return snapshot;
}
/*
* GetUndoRecPtr -- returns oldest PROC->logRec.
*/
XLogRecPtr GetUndoRecPtr(void);
XLogRecPtr
GetUndoRecPtr(void)
{
SISeg *segP = shmInvalBuffer;
ProcState *stateP = segP->procState;
XLogRecPtr urec = {0, 0};
XLogRecPtr tempr;
int index;
SpinAcquire(SInvalLock);
for (index = 0; index < segP->maxBackends; index++)
{
SHMEM_OFFSET pOffset = stateP[index].procStruct;
if (pOffset != INVALID_OFFSET)
{
PROC *proc = (PROC *) MAKE_PTR(pOffset);
tempr = proc->logRec;
if (tempr.xrecoff == 0)
continue;
if (urec.xrecoff != 0 && XLByteLT(urec, tempr))
continue;
urec = tempr;
}
}
SpinRelease(SInvalLock);
return(urec);
}