diff --git a/doc/configuration.txt b/doc/configuration.txt
index 450d831..65aabd8 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -2493,10 +2493,12 @@
 
 tune.runqueue-depth <number>
   Sets the maximum amount of task that can be processed at once when running
-  tasks. The default value is 200. Increasing it may incur latency when
-  dealing with I/Os, making it too small can incur extra overhead. When
-  experimenting with much larger values, it may be useful to also enable
-  tune.sched.low-latency to limit the maximum latency to the lowest possible.
+  tasks. The default value is 40 which tends to show the highest request rates
+  and lowest latencies. Increasing it may incur latency when dealing with I/Os,
+  making it too small can incur extra overhead. When experimenting with much
+  larger values, it may be useful to also enable tune.sched.low-latency and
+  possibly tune.fd.edge-triggered to limit the maximum latency to the lowest
+  possible.
 
 tune.sched.low-latency { on | off }
   Enables ('on') or disables ('off') the low-latency task scheduler. By default