This patch allows puppet to handle configuration of the mpm_worker
apache mod. The config file added here is copied from an Ubuntu Trusty
apache package with the value of MaxRequestWorkers changed from 150 to
400. I reason that this is a reasonable number based on the
MaxRequestWorkers documentation claiming the default is 400 for
mpm_worker[1]:
For threaded and hybrid servers (e.g. event or worker)
MaxRequestWorkers restricts the total number of threads that will be
available to serve clients. For hybrid MPMs the default value is 16
(ServerLimit) multiplied by the value of 25 (ThreadsPerChild).
Therefore, to increase MaxRequestWorkers to a value that requires
more than 16 processes, you must also raise ServerLimit.
If 400 is too few, we can increase it but we must also increase
ServerLimit, which requires not just an apache restart but a full stop
and start[2]:
Any attempts to change this directive during a restart will be ignored
[1] https://httpd.apache.org/docs/2.4/mod/mpm_common.html#maxrequestworkers
[2] https://httpd.apache.org/docs/2.4/mod/mpm_common.html#serverlimit
Change-Id: Iab0012e02506f5b7212fe273cfe673f95279d440
b251f1393f