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-rw-r--r--src/include/port/freebsd.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/include/port/freebsd.h b/src/include/port/freebsd.h
index 2e36d3da4f4..2e2e749a6b6 100644
--- a/src/include/port/freebsd.h
+++ b/src/include/port/freebsd.h
@@ -1 +1,10 @@
/* src/include/port/freebsd.h */
+
+/*
+ * Set the default wal_sync_method to fdatasync. xlogdefs.h's normal rules
+ * would prefer open_datasync on FreeBSD 13+, but that is not a good choice on
+ * many systems.
+ */
+#ifdef HAVE_FDATASYNC
+#define PLATFORM_DEFAULT_SYNC_METHOD SYNC_METHOD_FDATASYNC
+#endif