diff --git a/runbot/models/build.py b/runbot/models/build.py
index 9ac59763..5d8fdeb3 100644
--- a/runbot/models/build.py
+++ b/runbot/models/build.py
@@ -120,7 +120,6 @@ class runbot_build(models.Model):
 
     @api.depends('children_ids.global_state', 'local_state', 'duplicate_id.global_state')
     def _compute_global_state(self):
-        # could we use nb_pending / nb_testing ? not in a compute, but in a update state method
         for record in self:
             if record.duplicate_id:
                 record.global_state = record.duplicate_id.global_state
@@ -172,23 +171,6 @@ class runbot_build(models.Model):
     def _get_result_score(self, result):
         return result_order.index(result)
 
-    def _update_nb_children(self, new_state, old_state=None):
-        # could be interresting to update state in batches.
-        tracked_count_list = ['pending', 'testing', 'running']
-        if (new_state not in tracked_count_list and old_state not in tracked_count_list) or new_state == old_state:
-            return
-
-        for record in self:
-            values = {}
-            if old_state in tracked_count_list:
-                values['nb_%s' % old_state] = record['nb_%s' % old_state] - 1
-            if new_state in tracked_count_list:
-                values['nb_%s' % new_state] = record['nb_%s' % new_state] + 1
-
-            record.write(values)
-            if record.parent_id:
-                record.parent_id._update_nb_children(new_state, old_state)
-
     @api.depends('active_step', 'duplicate_id.active_step')
     def _compute_job(self):
         for build in self:
@@ -209,7 +191,6 @@ class runbot_build(models.Model):
             return self.env['runbot.build']
         vals['config_id'] = vals['config_id'] if 'config_id' in vals else branch.config_id.id
         build_id = super(runbot_build, self).create(vals)
-        build_id._update_nb_children(build_id.local_state)
         extra_info = {'sequence': build_id.id if not build_id.sequence else build_id.sequence}
         context = self.env.context
 
@@ -316,8 +297,6 @@ class runbot_build(models.Model):
             build_by_old_values = defaultdict(lambda: self.env['runbot.build'])
             for record in self:
                 build_by_old_values[record.local_state] += record
-            for local_state, builds in build_by_old_values.items():
-                builds._update_nb_children(values.get('local_state'), local_state)
         assert 'state' not in values
         local_result = values.get('local_result')
         for build in self:
diff --git a/runbot/templates/build.xml b/runbot/templates/build.xml
index c2a1a2d9..db51b773 100644
--- a/runbot/templates/build.xml
+++ b/runbot/templates/build.xml
@@ -148,9 +148,6 @@
                             </td>
                             <td t-if="build.real_build.children_ids">
                               Children:
-                              <t t-if="build.real_build.nb_pending > 0"><t t-esc="build.real_build.nb_pending"/> pending </t>
-                              <t t-if="build.real_build.nb_testing > 0"><t t-esc="build.real_build.nb_testing"/> testing </t>
-                              <t t-if="build.real_build.nb_running > 0"><t t-esc="build.real_build.nb_running"/> running </t>
                               <table class="table table-condensed">
                                 <t t-foreach="build.real_build.children_ids.sorted('id')" t-as="child">
                                   <t t-set="rowclass"><t t-call="runbot.build_class"><t t-set="build" t-value="child"/></t></t>
diff --git a/runbot/tests/test_build.py b/runbot/tests/test_build.py
index b3fe1aeb..1d6974a8 100644
--- a/runbot/tests/test_build.py
+++ b/runbot/tests/test_build.py
@@ -327,62 +327,59 @@ class Test_Build(RunbotCase):
             'extra_params': '5',
         })
 
-        def assert_state(nb_pending, nb_testing, nb_running, global_state, build):
-            self.assertEqual(build.nb_pending, nb_pending)
-            self.assertEqual(build.nb_testing, nb_testing)
-            self.assertEqual(build.nb_running, nb_running)
+        def assert_state(global_state, build):
             self.assertEqual(build.global_state, global_state)
 
-        assert_state(5, 0, 0, 'pending', build1)
-        assert_state(3, 0, 0, 'pending', build1_1)
-        assert_state(1, 0, 0, 'pending', build1_2)
-        assert_state(1, 0, 0, 'pending', build1_1_1)
-        assert_state(1, 0, 0, 'pending', build1_1_2)
+        assert_state('pending', build1)
+        assert_state('pending', build1_1)
+        assert_state('pending', build1_2)
+        assert_state('pending', build1_1_1)
+        assert_state('pending', build1_1_2)
 
         build1.local_state = 'testing'
         build1_1.local_state = 'testing'
         build1.local_state = 'done'
         build1_1.local_state = 'done'
 
-        assert_state(3, 0, 0, 'waiting', build1)
-        assert_state(2, 0, 0, 'waiting', build1_1)
-        assert_state(1, 0, 0, 'pending', build1_2)
-        assert_state(1, 0, 0, 'pending', build1_1_1)
-        assert_state(1, 0, 0, 'pending', build1_1_2)
+        assert_state('waiting', build1)
+        assert_state('waiting', build1_1)
+        assert_state('pending', build1_2)
+        assert_state('pending', build1_1_1)
+        assert_state('pending', build1_1_2)
 
         build1_1_1.local_state = 'testing'
 
-        assert_state(2, 1, 0, 'waiting', build1)
-        assert_state(1, 1, 0, 'waiting', build1_1)
-        assert_state(1, 0, 0, 'pending', build1_2)
-        assert_state(0, 1, 0, 'testing', build1_1_1)
-        assert_state(1, 0, 0, 'pending', build1_1_2)
+        assert_state('waiting', build1)
+        assert_state('waiting', build1_1)
+        assert_state('pending', build1_2)
+        assert_state('testing', build1_1_1)
+        assert_state('pending', build1_1_2)
 
         build1_2.local_state = 'testing'
 
-        assert_state(1, 2, 0, 'waiting', build1)
-        assert_state(1, 1, 0, 'waiting', build1_1)
-        assert_state(0, 1, 0, 'testing', build1_2)
-        assert_state(0, 1, 0, 'testing', build1_1_1)
-        assert_state(1, 0, 0, 'pending', build1_1_2)
+        assert_state('waiting', build1)
+        assert_state('waiting', build1_1)
+        assert_state('testing', build1_2)
+        assert_state('testing', build1_1_1)
+        assert_state('pending', build1_1_2)
 
         build1_2.local_state = 'testing'  # writing same state a second time
 
-        assert_state(1, 2, 0, 'waiting', build1)
-        assert_state(1, 1, 0, 'waiting', build1_1)
-        assert_state(0, 1, 0, 'testing', build1_2)
-        assert_state(0, 1, 0, 'testing', build1_1_1)
-        assert_state(1, 0, 0, 'pending', build1_1_2)
+        assert_state('waiting', build1)
+        assert_state('waiting', build1_1)
+        assert_state('testing', build1_2)
+        assert_state('testing', build1_1_1)
+        assert_state('pending', build1_1_2)
 
         build1_1_2.local_state = 'done'
         build1_1_1.local_state = 'done'
         build1_2.local_state = 'done'
 
-        assert_state(0, 0, 0, 'done', build1)
-        assert_state(0, 0, 0, 'done', build1_1)
-        assert_state(0, 0, 0, 'done', build1_2)
-        assert_state(0, 0, 0, 'done', build1_1_1)
-        assert_state(0, 0, 0, 'done', build1_1_2)
+        assert_state('done', build1)
+        assert_state('done', build1_1)
+        assert_state('done', build1_2)
+        assert_state('done', build1_1_1)
+        assert_state('done', build1_1_2)
 
     def test_duplicate_childrens(self):
         build_old = self.create_build({
@@ -406,8 +403,6 @@ class Test_Build(RunbotCase):
         self.assertEqual(build_child.local_state, 'duplicate')
         self.assertEqual(build_child.duplicate_id, build_old)
         self.assertEqual(build_child.global_state, 'done')
-        self.assertEqual(build_parent.nb_pending, 0)
-        self.assertEqual(build_parent.nb_testing, 0)
         self.assertEqual(build_parent.global_state, 'done')
 
 
diff --git a/runbot/views/host_views.xml b/runbot/views/host_views.xml
index bfbd09b5..ae784994 100644
--- a/runbot/views/host_views.xml
+++ b/runbot/views/host_views.xml
@@ -16,8 +16,6 @@
                         <field name="last_success" readonly='1'/>
                         <field name="assigned_only"/>
                         <field name="nb_worker"/>
-                        <field name="nb_testing"/>
-                        <field name="nb_running"/>
                         <field name="last_exception" readonly='1'/>
                         <field name="exception_count" readonly='1'/>
                     </group>