diff --git a/src/backend/access/transam/xlogreader.c b/src/backend/access/transam/xlogreader.c
index 3a86f3497e..13b25e5236 100644
--- a/src/backend/access/transam/xlogreader.c
+++ b/src/backend/access/transam/xlogreader.c
@@ -303,6 +303,16 @@ XLogReadRecord(XLogReaderState *state, XLogRecPtr RecPtr, char **errormsg)
 	record = (XLogRecord *) (state->readBuf + RecPtr % XLOG_BLCKSZ);
 	total_len = record->xl_tot_len;
 
+#ifndef FRONTEND
+	/*
+	 * XXX: remove from final patch , just here to check that garbage
+	 * data can be fetched from blocks read.
+	 */
+	if (total_len > 5 * XLOG_BLCKSZ)
+		elog(LOG, "length of %u fetched for record %X/%X", total_len,
+			 (uint32) (RecPtr >> 32), (uint32) RecPtr);
+#endif
+
 	/*
 	 * If the whole record header is on this page, validate it immediately.
 	 * Otherwise do just a basic sanity check on xl_tot_len, and validate the