Display WAL pointer in rm_redo error callback

This makes it easier to identify the source of a recovery problem
in case of a bug or data corruption.

diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 06cefe2efeb4df6c0a52ddc8659d956188ba12e3..00140ba8f40b4bf7213119e1181fdfe02dd2aed6 100644 (file)
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -10847,7 +10847,11 @@ rm_redo_error_callback(void *arg)
        initStringInfo(&buf);
        xlog_outdesc(&buf, record);
 
-       errcontext("xlog redo %s", buf.data);
+       /* translator: %s is an XLog record description */
+       errcontext("xlog redo at %X/%X for %s",
+                          (uint32) (record->ReadRecPtr >> 32),
+                          (uint32) record->ReadRecPtr,
+                          buf.data);
 
        pfree(buf.data);
 }