diff -r 042ed354b9eb -r dcac24ec935b mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Oct 31 22:19:03 2018 +0900
+++ b/mercurial/configitems.py	Wed Oct 31 22:43:08 2018 +0900
@@ -179,11 +179,14 @@
 coreconfigitem('cmdserver', 'max-log-size',
     default='1 MB',
 )
+coreconfigitem('cmdserver', 'max-repo-cache',
+    default=0,
+)
 coreconfigitem('cmdserver', 'message-encodings',
     default=list,
 )
 coreconfigitem('cmdserver', 'track-log',
-    default=lambda: ['chgserver', 'cmdserver'],
+    default=lambda: ['chgserver', 'cmdserver', 'repocache'],
 )
 coreconfigitem('color', '.*',
     default=None,