--- a/hgext3rd/evolve/obsdiscovery.py	Wed Dec 26 22:14:23 2018 +0800
+++ b/hgext3rd/evolve/obsdiscovery.py	Fri Jan 04 00:10:44 2019 -0500
@@ -74,11 +74,11 @@
 obsexcmsg = utility.obsexcmsg
 
 # Config
-eh.configitem('experimental', 'evolution.obsdiscovery')
-eh.configitem('experimental', 'obshashrange')
-eh.configitem('experimental', 'obshashrange.warm-cache')
-eh.configitem('experimental', 'obshashrange.max-revs')
-eh.configitem('experimental', 'obshashrange.lru-size')
+eh.configitem('experimental', 'evolution.obsdiscovery', True)
+eh.configitem('experimental', 'obshashrange', True)
+eh.configitem('experimental', 'obshashrange.warm-cache', 'auto')
+eh.configitem('experimental', 'obshashrange.max-revs', None)
+eh.configitem('experimental', 'obshashrange.lru-size', 2000)
 
 ##################################
 ###  Code performing discovery ###
@@ -775,9 +775,9 @@
     return encodelist(hashes)
 
 def _useobshashrange(repo):
-    base = repo.ui.configbool('experimental', 'obshashrange', True)
+    base = repo.ui.configbool('experimental', 'obshashrange')
     if base:
-        maxrevs = repo.ui.configint('experimental', 'obshashrange.max-revs', None)
+        maxrevs = repo.ui.configint('experimental', 'obshashrange.max-revs')
         if maxrevs is not None and maxrevs < len(repo.unfiltered()):
             base = False
     return base
@@ -945,7 +945,7 @@
     """wrapper to advertise new capability"""
     caps = orig(repo, proto)
     if (obsolete.isenabled(repo, obsolete.exchangeopt)
-        and repo.ui.configbool('experimental', 'evolution.obsdiscovery', True)):
+        and repo.ui.configbool('experimental', 'evolution.obsdiscovery')):
 
         # Compat hg 4.6+ (2f7290555c96)
         bytesresponse = False
@@ -1015,7 +1015,7 @@
 """
 
 def usediscovery(repo):
-    return repo.ui.configbool('experimental', 'evolution.obsdiscovery', True)
+    return repo.ui.configbool('experimental', 'evolution.obsdiscovery')
 
 @eh.wrapfunction(exchange, '_pushdiscoveryobsmarkers')
 def _pushdiscoveryobsmarkers(orig, pushop):