diff --git a/README.md b/README.md
index 3211292..255288d 100644
--- a/README.md
+++ b/README.md
@@ -98,7 +98,7 @@ This tunable is the same as the former, but it is the ceiling for **synchronous*
 ### vm.dirty_expire_centisecs: 300 (3s) --> 1000 (10s)
 This is the longest that dirty pages can remain in the system before they are forcefully written out to the disk. By increasing this value, we can allow the dirty background writeback to take its time asynchronously, and avoid unnecessary writebacks that can clog the flusher thread.
 
-### vm.dirty_writeback_centisecs: 500 (5s) --> 1000 (10s)
+### vm.dirty_writeback_centisecs: 500 (5s) --> 3000 (30s)
 Do background writeback via flusher threads less often to reduce occasional overhead.
 
 ### vm.page-cluster: 3 --> 0
diff --git a/ktweak b/ktweak
index 1631ae0..66e740c 100644
--- a/ktweak
+++ b/ktweak
@@ -141,7 +141,7 @@ write /proc/sys/kernel/sched_schedstats 0
 write /proc/sys/vm/dirty_background_ratio 10
 write /proc/sys/vm/dirty_ratio 30
 write /proc/sys/vm/dirty_expire_centisecs 1000
-write /proc/sys/vm/dirty_writeback_centisecs 1000
+write /proc/sys/vm/dirty_writeback_centisecs 3000
 write /proc/sys/vm/page-cluster 0
 write /proc/sys/vm/reap_mem_on_sigkill 1
 write /proc/sys/vm/stat_interval 10