Github user dyozie commented on a diff in the pull request:
https://github.com/apache/incubator-hawq-docs/pull/59#discussion_r87913443
--- Diff: bestpractices/operating_hawq_bestpractices.html.md.erb ---
@@ -4,6 +4,16 @@ title: Best Practices for Operating HAWQ
This topic provides best practices for operating HAWQ, including
recommendations for stopping, starting and monitoring HAWQ.
+## <a id="best_practice_config"></a>Best Practices for Configuring HAWQ
Parameters
+
+The HAWQ configuration guc/parameters are located in
`$GPHOME/etc/hawq-site.xml`. This configuration file resides on all HAWQ
instances and can be modified either by the Ambari interface or the command
line.
+
+If you install and manage HAWQ using Ambari, use the Ambari interface for
all configuration changes. Do not use command line utilities such as `hawq
config` to set or change HAWQ configuration properties for Ambari-managed
clusters. Configuration changes to `hawq-site.xml` made outside the Ambari
interface will be overwritten when you restart or reconfigure HAWQ using Ambari.
+
+If you make changes using the command line interface, use a consistent
`hawq-site.xml` file to configure your entire cluster.
--- End diff --
Change this sentence to start: "If you manage your cluster using
command-line tools instead of Ambari, then use a consistent ..."
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