diff --git a/Config/Internal.hs b/Config/Internal.hs
--- a/Config/Internal.hs
+++ b/Config/Internal.hs
@@ -25,6 +25,7 @@
   , opt_index_cgi = "index.cgi"
   , opt_status_file_dir = "/usr/local/share/mighty/status"
   , opt_connection_timeout = 30
+  , opt_fd_cache_duration = 10
   , opt_server_name = programName ++ "/" ++ programVersion
   , opt_worker_processes = 1
   , opt_routing_file = Nothing
@@ -44,6 +45,7 @@
   , opt_index_cgi  :: !String
   , opt_status_file_dir :: !String
   , opt_connection_timeout :: !Int
+  , opt_fd_cache_duration :: !Int
   , opt_server_name :: !String
   , opt_worker_processes :: !Int
   , opt_routing_file :: !(Maybe FilePath)
@@ -71,6 +73,7 @@
   , opt_index_cgi          = get "Index_Cgi" opt_index_cgi
   , opt_status_file_dir    = get "Status_File_Dir" opt_status_file_dir
   , opt_connection_timeout = get "Connection_Timeout" opt_connection_timeout
+  , opt_fd_cache_duration  = get "Fd_Cache_Duration" opt_fd_cache_duration
   , opt_server_name        = get "Server_Name" opt_server_name
   , opt_worker_processes   = get "Worker_Processes" opt_worker_processes
   , opt_routing_file       = Nothing
diff --git a/Mighty.hs b/Mighty.hs
--- a/Mighty.hs
+++ b/Mighty.hs
@@ -236,6 +236,8 @@
       , settingsOnClose     = decrement stt
       , settingsTimeout     = opt_connection_timeout opt
       , settingsHost        = HostAny
+      , settingsFdCacheDuration     = opt_fd_cache_duration opt
+      , settingsResourceTPerRequest = False
       }
     serverName = BS.pack $ opt_server_name opt
     cspec zdater = ClassicAppSpec {
diff --git a/example.conf b/example.conf
--- a/example.conf
+++ b/example.conf
@@ -14,5 +14,6 @@
 Index_Cgi: index.cgi
 Status_File_Dir: /usr/local/share/mighty/status
 Connection_Timeout: 30 # seconds
+Fd_Cache_Duration: 10 # seconds
 # Server_Name: Mighttpd/2.x.y
 Worker_Processes: 1
diff --git a/mighttpd2.cabal b/mighttpd2.cabal
--- a/mighttpd2.cabal
+++ b/mighttpd2.cabal
@@ -1,5 +1,5 @@
 Name:                   mighttpd2
-Version:                2.8.0
+Version:                2.8.1
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3