Increase Dart's github polling interval, especially for client.dart.packages.

masters/master.client.dart/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # It has one job: define a dictionary named BuildmasterConfig. This
 # dictionary has a variety of keys to control different aspects of the
 # buildmaster. They are documented in docs/config.xhtml .
@@ skipping 821 matching lines @@
   any_steps = build_utils.ExtractFactoriesSteps(factory_map)
   c['status'].append(goodrevisions.GoodRevisions(
       good_revision_steps=any_steps,
       store_revisions_url=ActiveMaster.store_revisions_url))
 
 
 # Keep last build logs, the default is too low.
 c['buildHorizon'] = 1000
 c['logHorizon'] = 500
 # Must be at least 2x the number of slaves.
-c['eventHorizon'] = 200
+c['eventHorizon'] = 500

[ricow1, 2015/10/09 11:25:54]

this should probably be slightly higher, we have a lot with all the stable and
dev builders, maybe 700

 
 # Template generation is using 40 entries, so give it a little extra.
 c['buildCacheSize'] = 42
 
 c['properties'] = {'mastername': master_utils.GetMastername()}
 
 ####### PROJECT IDENTITY
 
 # the 'projectName' string will be used to describe the project that this
 # buildbot is working on. For example, it is used as the title of the
 # waterfall HTML page. The 'projectURL' string will be used to provide a link
 # from buildbot HTML pages to your project's home page.
 
 c['projectName'] = ActiveMaster.project_name
 c['projectURL'] = config.Master.project_url
 
 # the 'buildbotURL' string should point to the location where the buildbot's
 # internal web server (usually the html.Waterfall page) is visible. This
 # typically uses the port number set in the Waterfall 'status' entry, but
 # with an externally-visible host name which the buildbot cannot figure out
 # without some help.
 
 c['buildbotURL'] = ActiveMaster.buildbot_url