--- src/backend/access/transam/xlog.c.orig	Mon Feb 25 11:04:39 2002
+++ src/backend/access/transam/xlog.c	Mon Feb 25 12:30:58 2002
@@ -991,16 +991,17 @@
 XLogWrite(XLogwrtRqst WriteRqst)
 {
 	XLogCtlWrite *Write = &XLogCtl->Write;
-	char	   *from;
+	char		*from;
 	bool		ispartialpage;
 	bool		use_existent;
-
+	uint32	data_size,first_time,current_xrecoff;
 	/*
 	 * Update local LogwrtResult (caller probably did this already,
 	 * but...)
 	 */
 	LogwrtResult = Write->LogwrtResult;
-
+	first_time=1;
+	current_xrecoff=LogwrtResult.Write.xrecoff;
 	while (XLByteLT(LogwrtResult.Write, WriteRqst.Write))
 	{
 		/*
@@ -1080,19 +1081,46 @@
 			openLogOff = 0;
 		}
 
-		/* Need to seek in the file? */
-		if (openLogOff != (LogwrtResult.Write.xrecoff - BLCKSZ) % XLogSegSize)
+	/* Need to seek in the file? */
+		if (openLogOff != (current_xrecoff ) % XLogSegSize)
 		{
-			openLogOff = (LogwrtResult.Write.xrecoff - BLCKSZ) % XLogSegSize;
+			openLogOff = (current_xrecoff ) % XLogSegSize;
 			if (lseek(openLogFile, (off_t) openLogOff, SEEK_SET) < 0)
 				elog(STOP, "lseek of log file %u, segment %u, offset %u failed: %m",
 					 openLogId, openLogSeg, openLogOff);
-		}
+		} 
 
 		/* OK to write the page */
 		from = XLogCtl->pages + Write->curridx * BLCKSZ;
+		data_size=BLCKSZ ;
+		{  /* compute the data size to write in to the file */
+			int offset;
+			int type=0; /* used only for display debug info */
+			offset= current_xrecoff % BLCKSZ ;
+			from = XLogCtl->pages + Write->curridx * BLCKSZ +offset ;
+			if (!ispartialpage && first_time==0)
+			{
+				data_size=BLCKSZ ;
+				type=1;        
+			}else
+			{
+				if(ispartialpage)
+				{
+					data_size=WriteRqst.Write.xrecoff-current_xrecoff;
+					type=2;
+				}else
+				{
+					data_size=BLCKSZ-(current_xrecoff-((current_xrecoff/BLCKSZ)*BLCKSZ)); 
+					type=3;
+				} 
+			}
+			current_xrecoff=current_xrecoff+data_size;
+			if (XLOG_DEBUG) 
+				elog(DEBUG,"XLogWrite type:%d from:%x(%d)  size:%d  Fileoffset:%d \n",type,from,from,data_size,openLogOff);
+			first_time=0;
+		} 
 		errno = 0;
-		if (write(openLogFile, from, BLCKSZ) != BLCKSZ)
+		if (write(openLogFile, from, data_size) != data_size)
 		{
 			/* if write didn't set errno, assume problem is no disk space */
 			if (errno == 0)
@@ -1100,7 +1128,7 @@
 			elog(STOP, "write of log file %u, segment %u, offset %u failed: %m",
 				 openLogId, openLogSeg, openLogOff);
 		}
-		openLogOff += BLCKSZ;
+		openLogOff += data_size;
 
 		/*
 		 * If we just wrote the whole last page of a logfile segment,