From 0c9a7a497a3a1fc1d767ad2a39a06c56c4a24e08 Mon Sep 17 00:00:00 2001
From: iwysiu <isabella.siu@10gen.com>
Date: Fri, 15 Jul 2016 13:10:05 -0400
Subject: [PATCH] SERVER-24729 stagger the launching of resmoke jobs

---
 buildscripts/resmokelib/testing/executor.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/buildscripts/resmokelib/testing/executor.py b/buildscripts/resmokelib/testing/executor.py
index 5d79abd6ac6..3628fa06053 100644
--- a/buildscripts/resmokelib/testing/executor.py
+++ b/buildscripts/resmokelib/testing/executor.py
@@ -5,6 +5,7 @@ Driver of the test execution framework.
 from __future__ import absolute_import
 
 import threading
+import time
 
 from . import fixtures
 from . import hooks as _hooks
@@ -148,6 +149,10 @@ class TestGroupExecutor(object):
                 t.daemon = True
                 t.start()
                 threads.append(t)
+                # SERVER-24729 Need to stagger when jobs start to reduce I/O load if there
+                # are many of them.  Both the 5 and the 10 are arbitrary.
+                if len(threads) >= 5:
+                    time.sleep(10)
 
             joined = False
             while not joined: