diff --git a/conf/example.conf.in b/conf/example.conf.in
index 78f11d1aa..ed34b9110 100644
--- a/conf/example.conf.in
+++ b/conf/example.conf.in
@@ -1297,7 +1297,7 @@ activation {
 	# The clean/dirty state of data is tracked for each region.
 	# The value is rounded down to a power of two if necessary, and
 	# is ignored if it is not a multiple of the machine memory page size.
-	raid_region_size = 512
+	raid_region_size = 2048
 
 	# Configuration option activation/error_when_full.
 	# Return errors if a thin pool runs out of space.
diff --git a/lib/config/defaults.h b/lib/config/defaults.h
index b5d9983f5..65b81f1d1 100644
--- a/lib/config/defaults.h
+++ b/lib/config/defaults.h
@@ -202,7 +202,7 @@
 #define DEFAULT_ACTIVATION_MODE "degraded"
 #define DEFAULT_USE_LINEAR_TARGET 1
 #define DEFAULT_STRIPE_FILLER "error"
-#define DEFAULT_RAID_REGION_SIZE   512	/* KB */
+#define DEFAULT_RAID_REGION_SIZE   2048	/* KB */
 #define DEFAULT_INTERVAL 15
 
 #define DEFAULT_MAX_HISTORY 100