diff --git a/master/src/config.hrl b/master/src/config.hrl
index 2f2cc4260..5b2ad0bff 100644
--- a/master/src/config.hrl
+++ b/master/src/config.hrl
@@ -1,4 +1,7 @@
-
+-define(SECOND, 1000).
+-define(MINUTE, 60 * ?SECOND).
+-define(HOUR, 60 * ?MINUTE).
+-define(DAY, 24 * ?HOUR).
 -define(MB, 1024 * 1024).
 
 -define(MAX_JSON_POST, 32 * ?MB).
diff --git a/master/src/temp_gc.erl b/master/src/temp_gc.erl
index 5ac7a3516..6c6590741 100644
--- a/master/src/temp_gc.erl
+++ b/master/src/temp_gc.erl
@@ -1,10 +1,11 @@
 -module(temp_gc).
 
 -include_lib("kernel/include/file.hrl").
+-include("config.hrl").
 
 -export([start_link/1]).
 
--define(GC_INTERVAL, 600000).
+-define(GC_INTERVAL, 2 * ?DAY).
 
 -spec start_link(pid()) -> no_return().
 start_link(Master) ->
@@ -35,6 +36,7 @@ loop() ->
             % master busy, try again after GC_INTERVAL
             ok
     end,
+    error_logger:info_report({"Tempgc: one pass completed"}),
     timer:sleep(?GC_INTERVAL),
     flush(),
     loop().
@@ -96,7 +98,7 @@ process_job(JobPath, Purged) ->
                 ok
             end,
             % Sleep here to prevent master and disk being DDOS'ed
-            timer:sleep(10);
+            timer:sleep(100);
         E ->
             error_logger:info_report({"Tempgc: file error", E})
     end.