diff --git a/src/backend/access/gin/ginxlog.c b/src/backend/access/gin/ginxlog.c
index ee68ac92bbe..ecf9589ec41 100644
--- a/src/backend/access/gin/ginxlog.c
+++ b/src/backend/access/gin/ginxlog.c
@@ -121,22 +121,49 @@ ginRedoInsert(XLogRecPtr lsn, XLogRecord *record)
 	Buffer		buffer;
 	Page		page;
 
+	/* first, forget any incomplete split this insertion completes */
+	if (data->isData)
+	{
+		Assert(data->isDelete == FALSE);
+		if (!data->isLeaf && data->updateBlkno != InvalidBlockNumber)
+		{
+			PostingItem *pitem;
+
+			pitem = (PostingItem *) (XLogRecGetData(record) + sizeof(ginxlogInsert));
+			forgetIncompleteSplit(data->node,
+								  PostingItemGetBlockNumber(pitem),
+								  data->updateBlkno);
+		}
+	}
+	else
+	{
+		if (!data->isLeaf && data->updateBlkno != InvalidBlockNumber)
+		{
+			IndexTuple	itup;
+
+			itup = (IndexTuple) (XLogRecGetData(record) + sizeof(ginxlogInsert));
+			forgetIncompleteSplit(data->node,
+								  GinItemPointerGetBlockNumber(&itup->t_tid),
+								  data->updateBlkno);
+		}
+	}
+
 	/* nothing else to do if page was backed up */
 	if (record->xl_info & XLR_BKP_BLOCK_1)
 		return;
 
 	reln = XLogOpenRelation(data->node);
 	buffer = XLogReadBuffer(reln, data->blkno, false);
-	Assert(BufferIsValid(buffer));
+	if (!BufferIsValid(buffer))
+		return;
 	page = (Page) BufferGetPage(buffer);
 
-	if (data->isData)
+	if (!XLByteLE(lsn, PageGetLSN(page)))
 	{
-		Assert(data->isDelete == FALSE);
-		Assert(GinPageIsData(page));
-
-		if ( ! XLByteLE(lsn, PageGetLSN(page)) )
+		if (data->isData)
 		{
+			Assert(GinPageIsData(page));
+
 			if (data->isLeaf)
 			{
 				OffsetNumber i;
@@ -166,22 +193,12 @@ ginRedoInsert(XLogRecPtr lsn, XLogRecord *record)
 				GinDataPageAddItem(page, pitem, data->offset);
 			}
 		}
-
-		if (!data->isLeaf && data->updateBlkno != InvalidBlockNumber)
+		else
 		{
-			PostingItem *pitem = (PostingItem *) (XLogRecGetData(record) + sizeof(ginxlogInsert));
-			forgetIncompleteSplit(data->node, PostingItemGetBlockNumber(pitem), data->updateBlkno);
-		}
+			IndexTuple	itup;
 
-	}
-	else
-	{
-		IndexTuple	itup;
+			Assert(!GinPageIsData(page));
 
-		Assert(!GinPageIsData(page));
-
-		if ( ! XLByteLE(lsn, PageGetLSN(page)) )
-		{
 			if (data->updateBlkno != InvalidBlockNumber)
 			{
 				/* update link to right page after split */
@@ -205,20 +222,12 @@ ginRedoInsert(XLogRecPtr lsn, XLogRecord *record)
 					 data->node.spcNode, data->node.dbNode, data->node.relNode);
 		}
 
-		if (!data->isLeaf && data->updateBlkno != InvalidBlockNumber)
-		{
-			itup = (IndexTuple) (XLogRecGetData(record) + sizeof(ginxlogInsert));
-			forgetIncompleteSplit(data->node, GinItemPointerGetBlockNumber(&itup->t_tid), data->updateBlkno);
-		}
-	}
-
-	if ( ! XLByteLE(lsn, PageGetLSN(page)) )
-	{
 		PageSetLSN(page, lsn);
 		PageSetTLI(page, ThisTimeLineID);
 
 		MarkBufferDirty(buffer);
 	}
+
 	UnlockReleaseBuffer(buffer);
 }
 
@@ -240,7 +249,7 @@ ginRedoSplit(XLogRecPtr lsn, XLogRecord *record)
 	if (data->isData)
 		flags |= GIN_DATA;
 
-	lbuffer = XLogReadBuffer(reln, data->lblkno, data->isRootSplit);
+	lbuffer = XLogReadBuffer(reln, data->lblkno, true);
 	Assert(BufferIsValid(lbuffer));
 	lpage = (Page) BufferGetPage(lbuffer);
 	GinInitBuffer(lbuffer, flags);
@@ -317,7 +326,7 @@ ginRedoSplit(XLogRecPtr lsn, XLogRecord *record)
 
 	if (data->isRootSplit)
 	{
-		Buffer		rootBuf = XLogReadBuffer(reln, data->rootBlkno, false);
+		Buffer		rootBuf = XLogReadBuffer(reln, data->rootBlkno, true);
 		Page		rootPage = BufferGetPage(rootBuf);
 
 		GinInitBuffer(rootBuf, flags & ~GIN_LEAF);
@@ -354,46 +363,51 @@ ginRedoVacuumPage(XLogRecPtr lsn, XLogRecord *record)
 	Buffer		buffer;
 	Page		page;
 
-	/* nothing else to do if page was backed up (and no info to do it with) */
+	/* nothing to do if page was backed up (and no info to do it with) */
 	if (record->xl_info & XLR_BKP_BLOCK_1)
 		return;
 
 	reln = XLogOpenRelation(data->node);
 	buffer = XLogReadBuffer(reln, data->blkno, false);
-	Assert(BufferIsValid(buffer));
+	if (!BufferIsValid(buffer))
+		return;
 	page = (Page) BufferGetPage(buffer);
 
-	if (GinPageIsData(page))
+	if (!XLByteLE(lsn, PageGetLSN(page)))
 	{
-		memcpy(GinDataPageGetData(page), XLogRecGetData(record) + sizeof(ginxlogVacuumPage),
-			   GinSizeOfItem(page) *data->nitem);
-		GinPageGetOpaque(page)->maxoff = data->nitem;
-	}
-	else
-	{
-		OffsetNumber i,
-				   *tod;
-		IndexTuple	itup = (IndexTuple) (XLogRecGetData(record) + sizeof(ginxlogVacuumPage));
-
-		tod = (OffsetNumber *) palloc(sizeof(OffsetNumber) * PageGetMaxOffsetNumber(page));
-		for (i = FirstOffsetNumber; i <= PageGetMaxOffsetNumber(page); i++)
-			tod[i - 1] = i;
-
-		PageIndexMultiDelete(page, tod, PageGetMaxOffsetNumber(page));
-
-		for (i = 0; i < data->nitem; i++)
+		if (GinPageIsData(page))
 		{
-			if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, LP_USED) == InvalidOffsetNumber)
-				elog(ERROR, "failed to add item to index page in %u/%u/%u",
-				  data->node.spcNode, data->node.dbNode, data->node.relNode);
-			itup = (IndexTuple) (((char *) itup) + MAXALIGN(IndexTupleSize(itup)));
+			memcpy(GinDataPageGetData(page), XLogRecGetData(record) + sizeof(ginxlogVacuumPage),
+				   GinSizeOfItem(page) *data->nitem);
+			GinPageGetOpaque(page)->maxoff = data->nitem;
 		}
+		else
+		{
+			OffsetNumber i,
+				*tod;
+			IndexTuple	itup = (IndexTuple) (XLogRecGetData(record) + sizeof(ginxlogVacuumPage));
+
+			tod = (OffsetNumber *) palloc(sizeof(OffsetNumber) * PageGetMaxOffsetNumber(page));
+			for (i = FirstOffsetNumber; i <= PageGetMaxOffsetNumber(page); i++)
+				tod[i - 1] = i;
+
+			PageIndexMultiDelete(page, tod, PageGetMaxOffsetNumber(page));
+
+			for (i = 0; i < data->nitem; i++)
+			{
+				if (PageAddItem(page, (Item) itup, IndexTupleSize(itup), InvalidOffsetNumber, LP_USED) == InvalidOffsetNumber)
+					elog(ERROR, "failed to add item to index page in %u/%u/%u",
+						 data->node.spcNode, data->node.dbNode, data->node.relNode);
+				itup = (IndexTuple) (((char *) itup) + MAXALIGN(IndexTupleSize(itup)));
+			}
+		}
+
+		PageSetLSN(page, lsn);
+		PageSetTLI(page, ThisTimeLineID);
+
+		MarkBufferDirty(buffer);
 	}
 
-	PageSetLSN(page, lsn);
-	PageSetTLI(page, ThisTimeLineID);
-
-	MarkBufferDirty(buffer);
 	UnlockReleaseBuffer(buffer);
 }
 
@@ -410,38 +424,56 @@ ginRedoDeletePage(XLogRecPtr lsn, XLogRecord *record)
 	if (!(record->xl_info & XLR_BKP_BLOCK_1))
 	{
 		buffer = XLogReadBuffer(reln, data->blkno, false);
-		page = BufferGetPage(buffer);
-		Assert(GinPageIsData(page));
-		GinPageGetOpaque(page)->flags = GIN_DELETED;
-		PageSetLSN(page, lsn);
-		PageSetTLI(page, ThisTimeLineID);
-		MarkBufferDirty(buffer);
-		UnlockReleaseBuffer(buffer);
+		if (BufferIsValid(buffer))
+		{
+			page = BufferGetPage(buffer);
+			if (!XLByteLE(lsn, PageGetLSN(page)))
+			{
+				Assert(GinPageIsData(page));
+				GinPageGetOpaque(page)->flags = GIN_DELETED;
+				PageSetLSN(page, lsn);
+				PageSetTLI(page, ThisTimeLineID);
+				MarkBufferDirty(buffer);
+			}
+			UnlockReleaseBuffer(buffer);
+		}
 	}
 
 	if (!(record->xl_info & XLR_BKP_BLOCK_2))
 	{
 		buffer = XLogReadBuffer(reln, data->parentBlkno, false);
-		page = BufferGetPage(buffer);
-		Assert(GinPageIsData(page));
-		Assert(!GinPageIsLeaf(page));
-		PageDeletePostingItem(page, data->parentOffset);
-		PageSetLSN(page, lsn);
-		PageSetTLI(page, ThisTimeLineID);
-		MarkBufferDirty(buffer);
-		UnlockReleaseBuffer(buffer);
+		if (BufferIsValid(buffer))
+		{
+			page = BufferGetPage(buffer);
+			if (!XLByteLE(lsn, PageGetLSN(page)))
+			{
+				Assert(GinPageIsData(page));
+				Assert(!GinPageIsLeaf(page));
+				PageDeletePostingItem(page, data->parentOffset);
+				PageSetLSN(page, lsn);
+				PageSetTLI(page, ThisTimeLineID);
+				MarkBufferDirty(buffer);
+			}
+			UnlockReleaseBuffer(buffer);
+		}
 	}
 
 	if (!(record->xl_info & XLR_BKP_BLOCK_3) && data->leftBlkno != InvalidBlockNumber)
 	{
 		buffer = XLogReadBuffer(reln, data->leftBlkno, false);
-		page = BufferGetPage(buffer);
-		Assert(GinPageIsData(page));
-		GinPageGetOpaque(page)->rightlink = data->rightLink;
-		PageSetLSN(page, lsn);
-		PageSetTLI(page, ThisTimeLineID);
-		MarkBufferDirty(buffer);
-		UnlockReleaseBuffer(buffer);
+		if (BufferIsValid(buffer))
+		{
+			page = BufferGetPage(buffer);
+			if (!XLByteLE(lsn, PageGetLSN(page)))
+			{
+				Assert(GinPageIsData(page));
+				GinPageGetOpaque(page)->rightlink = data->rightLink;
+				PageSetLSN(page, lsn);
+				PageSetTLI(page, ThisTimeLineID);
+				MarkBufferDirty(buffer);
+			}
+			UnlockReleaseBuffer(buffer);
+		}
 	}
 }
 
@@ -559,6 +591,13 @@ ginContinueSplit(ginIncompleteSplit *split)
 
 	buffer = XLogReadBuffer(reln, split->leftBlkno, false);
 
+	/*
+	 * Failure should be impossible here, because we wrote the page earlier.
+	 */
+	if (!BufferIsValid(buffer))
+		elog(PANIC, "ginContinueSplit: left block %u not found",
+			 split->leftBlkno);
+
 	if (split->rootBlkno == GIN_ROOT_BLKNO)
 	{
 		prepareEntryScan(&btree, reln, (Datum) 0, NULL);