/* No need to hold ControlFileLock yet, we aren't up far enough */
UpdateControlFile();
+ /* initialize shared-memory copy of latest checkpoint XID/epoch */
+ XLogCtl->ckptXidEpoch = ControlFile->checkPointCopy.nextXidEpoch;
+ XLogCtl->ckptXid = ControlFile->checkPointCopy.nextXid;
+
/* initialize our local copy of minRecoveryPoint */
minRecoveryPoint = ControlFile->minRecoveryPoint;
/* start the archive_timeout timer running */
XLogCtl->Write.lastSegSwitchTime = (pg_time_t) time(NULL);
- /* initialize shared-memory copy of latest checkpoint XID/epoch */
- XLogCtl->ckptXidEpoch = ControlFile->checkPointCopy.nextXidEpoch;
- XLogCtl->ckptXid = ControlFile->checkPointCopy.nextXid;
-
/* also initialize latestCompletedXid, to nextXid - 1 */
ShmemVariableCache->latestCompletedXid = ShmemVariableCache->nextXid;
TransactionIdRetreat(ShmemVariableCache->latestCompletedXid);
ControlFile->checkPointCopy.nextXidEpoch = checkPoint.nextXidEpoch;
ControlFile->checkPointCopy.nextXid = checkPoint.nextXid;
+ /* Update shared-memory copy of checkpoint XID/epoch */
+ {
+ /* use volatile pointer to prevent code rearrangement */
+ volatile XLogCtlData *xlogctl = XLogCtl;
+
+ SpinLockAcquire(&xlogctl->info_lck);
+ xlogctl->ckptXidEpoch = checkPoint.nextXidEpoch;
+ xlogctl->ckptXid = checkPoint.nextXid;
+ SpinLockRelease(&xlogctl->info_lck);
+ }
+
/*
* TLI may change in a shutdown checkpoint, but it shouldn't decrease
*/
ControlFile->checkPointCopy.nextXidEpoch = checkPoint.nextXidEpoch;
ControlFile->checkPointCopy.nextXid = checkPoint.nextXid;
+ /* Update shared-memory copy of checkpoint XID/epoch */
+ {
+ /* use volatile pointer to prevent code rearrangement */
+ volatile XLogCtlData *xlogctl = XLogCtl;
+
+ SpinLockAcquire(&xlogctl->info_lck);
+ xlogctl->ckptXidEpoch = checkPoint.nextXidEpoch;
+ xlogctl->ckptXid = checkPoint.nextXid;
+ SpinLockRelease(&xlogctl->info_lck);
+ }
+
/* TLI should not change in an on-line checkpoint */
if (checkPoint.ThisTimeLineID != ThisTimeLineID)
ereport(PANIC,