diff -c -r postgresql-8.0.2/src/backend/access/transam/xact.c postgresql-8.0.2.orig/src/backend/access/transam/xact.c
*** postgresql-8.0.2/src/backend/access/transam/xact.c	2005-05-07 22:42:03.000000000 +0300
--- postgresql-8.0.2.orig/src/backend/access/transam/xact.c	2004-12-31 23:59:29.000000000 +0200
***************
*** 1411,1424 ****
  	AfterTriggerBeginXact();
  
  	/*
- 	 * mark the transaction as not VACUUM  (vacuum_rel will set isVacuum to true 
- 	 * directly after calling BeginTransactionCommand() )
- 	 */
- 	if (MyProc != NULL)  
- 	{
- 		MyProc->inVacuum = false;
- 	}
- 	/*
  	 * done with start processing, set current transaction state to "in
  	 * progress"
  	 */
--- 1411,1416 ----
diff -c -r postgresql-8.0.2/src/backend/commands/vacuum.c postgresql-8.0.2.orig/src/backend/commands/vacuum.c
*** postgresql-8.0.2/src/backend/commands/vacuum.c	2005-05-08 00:36:55.000000000 +0300
--- postgresql-8.0.2.orig/src/backend/commands/vacuum.c	2004-12-31 23:59:42.000000000 +0200
***************
*** 37,43 ****
  #include "miscadmin.h"
  #include "storage/buf_internals.h"
  #include "storage/freespace.h"
- #include "storage/proc.h"
  #include "storage/sinval.h"
  #include "storage/smgr.h"
  #include "tcop/pquery.h"
--- 37,42 ----
***************
*** 424,434 ****
  				if (use_own_xacts)
  				{
  					StartTransactionCommand();
- 					if (MyProc != NULL)  /* is this needed here ? */
- 					{
- 						/* so other vacuums don't look at our xid/xmin in GetOldestXmin() */
- 						MyProc->inVacuum = true;
- 					}
  					/* functions in indexes may want a snapshot set */
  					ActiveSnapshot = CopySnapshot(GetTransactionSnapshot());
  				}
--- 423,428 ----
***************
*** 892,904 ****
  
  	/* Begin a transaction for vacuuming this relation */
  	StartTransactionCommand();
- 	
- 	if (MyProc != NULL)  /* is this needed here ? */
- 	{
- 		/* so other vacuums don't look at our xid/xmin in GetOldestXmin() */
- 		MyProc->inVacuum = true;
- 	}
- 	
  	/* functions in indexes may want a snapshot set */
  	ActiveSnapshot = CopySnapshot(GetTransactionSnapshot());
  
--- 886,891 ----
diff -c -r postgresql-8.0.2/src/backend/storage/ipc/sinval.c postgresql-8.0.2.orig/src/backend/storage/ipc/sinval.c
*** postgresql-8.0.2/src/backend/storage/ipc/sinval.c	2005-05-07 22:55:45.000000000 +0300
--- postgresql-8.0.2.orig/src/backend/storage/ipc/sinval.c	2005-01-01 00:00:56.000000000 +0200
***************
*** 697,703 ****
  		{
  			PGPROC	   *proc = (PGPROC *) MAKE_PTR(pOffset);
  
! 			if ((proc->inVacuum == false) && (allDbs || proc->databaseId == MyDatabaseId))
  			{
  				/* Fetch xid just once - see GetNewTransactionId */
  				TransactionId xid = proc->xid;
--- 697,703 ----
  		{
  			PGPROC	   *proc = (PGPROC *) MAKE_PTR(pOffset);
  
! 			if (allDbs || proc->databaseId == MyDatabaseId)
  			{
  				/* Fetch xid just once - see GetNewTransactionId */
  				TransactionId xid = proc->xid;
***************
*** 845,858 ****
  			 * them as running anyway.	We also assume that such xacts
  			 * can't compute an xmin older than ours, so they needn't be
  			 * considered in computing globalxmin.
- 			 *
- 			 * there is also no need to consider transaxtions runnibg the 
- 			 * vacuum command as it will not affect tuple visibility
  			 */
  			if (proc == MyProc ||
  				!TransactionIdIsNormal(xid) ||
! 				TransactionIdFollowsOrEquals(xid, xmax) ||
! 				proc->inVacuum == true )
  				continue;
  
  			if (TransactionIdPrecedes(xid, xmin))
--- 845,854 ----
  			 * them as running anyway.	We also assume that such xacts
  			 * can't compute an xmin older than ours, so they needn't be
  			 * considered in computing globalxmin.
  			 */
  			if (proc == MyProc ||
  				!TransactionIdIsNormal(xid) ||
! 				TransactionIdFollowsOrEquals(xid, xmax))
  				continue;
  
  			if (TransactionIdPrecedes(xid, xmin))
diff -c -r postgresql-8.0.2/src/include/storage/proc.h postgresql-8.0.2.orig/src/include/storage/proc.h
*** postgresql-8.0.2/src/include/storage/proc.h	2005-05-07 23:26:46.000000000 +0300
--- postgresql-8.0.2.orig/src/include/storage/proc.h	2005-01-01 00:03:42.000000000 +0200
***************
*** 63,73 ****
  								 * were starting our xact: vacuum must not
  								 * remove tuples deleted by xid >= xmin ! */
  
- 	bool		inVacuum;		/* true if current command is vacuum.
- 								 * xid or xmin of other vacuum commands 
- 								 * need not be used when 
- 								 * finding global xmin for removing tuples */
- 
  	int			pid;			/* This backend's process id */
  	Oid			databaseId;		/* OID of database this backend is using */
  
--- 63,68 ----