--- a/cubicweb/hooks/logstats.py	Wed Mar 29 11:46:17 2017 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,61 +0,0 @@
-# copyright 2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
-# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
-#
-# This file is part of CubicWeb.
-#
-# CubicWeb is free software: you can redistribute it and/or modify it under the
-# terms of the GNU Lesser General Public License as published by the Free
-# Software Foundation, either version 2.1 of the License, or (at your option)
-# any later version.
-#
-# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
-# details.
-#
-# You should have received a copy of the GNU Lesser General Public License along
-# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
-
-"""looping task for dumping instance's stats in a file
-"""
-
-
-
-from datetime import datetime
-import json
-
-from cubicweb.server import hook
-
-class LogStatsStartHook(hook.Hook):
-    """register task to regularly dump instance's stats in a file
-
-    data are stored as one json entry per row
-    """
-    __regid__ = 'cubicweb.hook.logstats.start'
-    events = ('server_startup',)
-
-    def __call__(self):
-        if not self.repo.has_scheduler():
-            return
-        interval = self.repo.config.get('logstat-interval', 0)
-        if interval <= 0:
-            return            
-
-        def dump_stats(repo):
-            statsfile = repo.config.get('logstat-file')
-            with repo.internal_cnx() as cnx:
-                stats = cnx.call_service('repo_stats')
-                gcstats = cnx.call_service('repo_gc_stats', nmax=5)
-                
-            allstats = {'resources': stats,
-                        'memory': gcstats,
-                        'timestamp': datetime.utcnow().isoformat(),
-                       }
-            try:
-                with open(statsfile, 'ab') as ofile:
-                    json.dump(allstats, ofile)
-                    ofile.write('\n')
-            except IOError:
-                repo.warning('Cannot open stats file for writing: %s', statsfile)
-                    
-        self.repo.looping_task(interval, dump_stats, self.repo)

--- a/doc/changes/3.25.rst	Wed Mar 29 11:46:17 2017 +0200
+++ b/doc/changes/3.25.rst	Wed Mar 29 13:29:41 2017 +0200
@@ -74,3 +74,7 @@
   (4516c3956d46).
 
 * The `next_tabindex` method of request class has been removed (011730a4af73).
+
+* The `cubicweb.hook.logstats.start` hook was dropped because it's looping
+  task would not be run in a web instance (see first point about repository
+  scheduler).