Switch proxies to use the mpm event module instead of prefork.

roles/httpd/proxy/files/00-mpm.conf

@@ -0,0 +1,18 @@
+# Select the MPM module which should be used by uncommenting exactly
+# one of the following LoadModule lines:
+
+# prefork MPM: Implements a non-threaded, pre-forking web server
+# See: http://httpd.apache.org/docs/2.4/mod/prefork.html
+#LoadModule mpm_prefork_module modules/mod_mpm_prefork.so
+
+# worker MPM: Multi-Processing Module implementing a hybrid
+# multi-threaded multi-process web server
+# See: http://httpd.apache.org/docs/2.4/mod/worker.html
+#
+#LoadModule mpm_worker_module modules/mod_mpm_worker.so
+
+# event MPM: A variant of the worker MPM with the goal of consuming
+# threads only for connections with active processing
+# See: http://httpd.apache.org/docs/2.4/mod/event.html
+#
+LoadModule mpm_event_module modules/mod_mpm_event.so

roles/httpd/proxy/tasks/main.yml

@@ -31,6 +31,14 @@
   - httpd
   - httpd/proxy
 
+- name: set the apache mpm to use event MPM
+  copy: src=00-mpm.conf dest=/etc/httpd/conf.modules.d/00-mpm.conf
+  notify:
+  - restart httpd
+  tags:
+  - httpd
+  - httpd/proxy
+
 - name: Install libsemanage-python so we can manage selinux with python...
   yum: name=libsemanage-python state=installed
   tags:

roles/httpd/proxy/templates/httpd.conf.j2

@@ -106,8 +106,8 @@ KeepAliveTimeout 15
 # MaxClients: maximum number of server processes allowed to start
 # MaxRequestsPerChild: maximum number of requests a server process serves
 StartServers           150
-MinSpareServers         50
+#MinSpareServers         50
-MaxSpareServers	       100
+#MaxSpareServers	       100
 ServerLimit           {{ maxrequestworkers }}
 MaxRequestWorkers     {{ maxrequestworkers }}
 MaxRequestsPerChild    10000