Add missing check for wal_debug GUC.

9a20a9b2 added a new elog(), enabled when WAL_DEBUG is defined. The
other WAL_DEBUG dependant messages check for the wal_debug GUC, but this
one did not. While at it replace 'upto' with 'up to'.

Discussion: 20150610110253.GF3832@alap3.anarazel.de

Backpatch to 9.4, the first release containing 9a20a9b2.

diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 150d56afb8fc341b585ef6947bebc02b132aa2ae..4e37ad3e21aa4c9dc2fd41f2c0b72a1d636e7ecf 100644 (file)
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -1983,9 +1983,9 @@ AdvanceXLInsertBuffer(XLogRecPtr upto, bool opportunistic)
        LWLockRelease(WALBufMappingLock);
 
 #ifdef WAL_DEBUG
-       if (npages > 0)
+       if (XLOG_DEBUG && npages > 0)
        {
-               elog(DEBUG1, "initialized %d pages, upto %X/%X",
+               elog(DEBUG1, "initialized %d pages, up to %X/%X",
                         npages, (uint32) (NewPageEndPtr >> 32), (uint32) NewPageEndPtr);
        }
 #endif