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-rw-r--r--src/backend/access/transam/xlog.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index 25b2ff9d03b..3cb866f5306 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -7523,9 +7523,9 @@ CreateRestartPoint(int flags)
}
/*
- * Calculate the last segment that we need to retain because of
- * wal_keep_segments, by subtracting wal_keep_segments from
- * the given xlog location, recptr.
+ * Retreat *logSegNo to the last segment that we need to retain because of
+ * wal_keep_segments. This is calculated by subtracting wal_keep_segments
+ * from the given xlog location, recptr.
*/
static void
KeepLogSeg(XLogRecPtr recptr, XLogSegNo *logSegNo)
@@ -7541,7 +7541,7 @@ KeepLogSeg(XLogRecPtr recptr, XLogSegNo *logSegNo)
if (segno <= wal_keep_segments)
segno = 1;
else
- segno = *logSegNo - wal_keep_segments;
+ segno = segno - wal_keep_segments;
/* don't delete WAL segments newer than the calculated segment */
if (segno < *logSegNo)