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Correctly init/deinit recovery xact environment.

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Previously we performed VirtualXactLockTableInsert
but didn't set MyProc->lxid for Startup process.
pg_locks now correctly shows "1/1" for vxid
of Startup process during Hot Standby.
At end of Hot Standby the Virtual Transaction
was not deleted, leading to problems after
promoting to normal running for some commands,
such as CREATE INDEX CONCURRENTLY.
This commit is contained in:
Simon Riggs
2012-11-29 23:46:54 +00:00
parent 1dbd02dc37
commit f4a3e67930
3 changed files with 27 additions and 1 deletions
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9
src/backend/storage/ipc/standby.c
View File

@ -82,7 +82,7 @@ InitRecoveryTransactionEnvironment(void)
* hold AccessShareLocks so never block while we write or lock new rows.
*/
vxid.backendId = MyBackendId;
vxid.localTransactionId = GetNextLocalTransactionId();
vxid.localTransactionId = MyProc->lxid = GetNextLocalTransactionId();
VirtualXactLockTableInsert(vxid);
standbyState = STANDBY_INITIALIZED;
@ -98,11 +98,18 @@ InitRecoveryTransactionEnvironment(void)
void
ShutdownRecoveryTransactionEnvironment(void)
{
VirtualTransactionId vxid;
/* Mark all tracked in-progress transactions as finished. */
ExpireAllKnownAssignedTransactionIds();
/* Release all locks the tracked transactions were holding */
StandbyReleaseAllLocks();
/* Cleanup our VirtualTransaction */
vxid.backendId = MyBackendId;
vxid.localTransactionId = MyProc->lxid;
VirtualXactLockTableDelete(vxid);
}

18
src/backend/storage/lmgr/lmgr.c
View File

@ -534,6 +534,24 @@ VirtualXactLockTableInsert(VirtualTransactionId vxid)
(void) LockAcquire(&tag, ExclusiveLock, false, false);
}
/*
* VirtualXactLockTableDelete
*
* Release a Virtual Transaction lock. Only called by Startup process
* at end of Hot Standby.
*/
void
VirtualXactLockTableDelete(VirtualTransactionId vxid)
{
LOCKTAG tag;
Assert(VirtualTransactionIdIsValid(vxid));
SET_LOCKTAG_VIRTUALTRANSACTION(tag, vxid);
(void) LockRelease(&tag, ExclusiveLock, false);
}
/*
* VirtualXactLockTableWait
*

1
src/include/storage/lmgr.h
View File

@ -58,6 +58,7 @@ extern bool ConditionalXactLockTableWait(TransactionId xid);
/* Lock a VXID (used to wait for a transaction to finish) */
extern void VirtualXactLockTableInsert(VirtualTransactionId vxid);
extern void VirtualXactLockTableDelete(VirtualTransactionId vxid);
extern void VirtualXactLockTableWait(VirtualTransactionId vxid);
extern bool ConditionalVirtualXactLockTableWait(VirtualTransactionId vxid);