Fix grammar

Reported by Jeremy Finzel

diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml
index 503ea8a2a7e913d1be7df792f2b1e7b092ee5c7f..b2b1a4367043b2aacf61b94e048dd6a6fd8beeb3 100644 (file)
--- a/doc/src/sgml/wal.sgml
+++ b/doc/src/sgml/wal.sgml
@@ -569,7 +569,7 @@
    removes the rest. The estimate is based on a moving average of the number
    of WAL files used in previous checkpoint cycles. The moving average
    is increased immediately if the actual usage exceeds the estimate, so it
-   accommodates peak usage rather average usage to some extent.
+   accommodates peak usage rather than average usage to some extent.
    min_wal_size puts a minimum on the amount of WAL files
    recycled for future usage; that much WAL is always recycled for future use,
    even if the system is idle and the WAL usage estimate suggests that little