updated parameters

services/ops/LogStatisticsAgent/README.md

@@ -8,23 +8,21 @@ which may be an indication of some sort of failure or breach.
 
 ### Configuration
 
-The Log Statistics agent has 4 required configuration values:
+The Log Statistics agent has 4 configuration parameters, all of which are required:
 
-- `file_path`:  This should be the path to the "volttron.log" file
-- `analysis_interval_secs`:  The interval in seconds between publishing the size delta statistic to the message bus
-- `publish_topic`:  Can be used to specify a topic to publish log statistics to which does not get captured by the 
-  historian framework (topics not prefixed by any of: "datalogger", "record", "analysis", "devices")
-- `historian_topic`:  Can be used to specify a topic to publish log statistics to which gets captured by the 
-  historian framework ("datalogger", "record", "analysis", "devices")
-
-The following is an example configuration file:
+- `file_path`:  The file path to the log file. If left as `null`, defaults to `'volttron.log'` located within your VOLTTRON_HOME environment variable.
+- `analysis_interval_secs`: The interval in seconds between publishes of the size delta statistic to the message bus. If left as `null`, defaults to 60 seconds.
+- `publish_topic`: Used to specify a topic to publish log statistics to which does not get captured by the
+  historian framework (topics not prefixed by any of: "datalogger", "record", "analysis", "devices"). If left as `null`, defaults to `"platform/log_statistics"`.
+- `historian_topic`:  Can be used to specify a topic to publish log statistics to which gets captured by the
+  historian framework ("datalogger", "record", "analysis", "devices"). If left as `null`, defaults to `record/log_statistics`.
 
 ```json
 {
-    "file_path" : "~/volttron/volttron.log",
-    "analysis_interval_min" : 60,
-    "publish_topic" : "platform/log_statistics",
-    "historian_topic" : "record/log_statistics"
+  "analysis_interval_sec": 60,
+  "file_path": null,
+  "historian_topic": "analysis/log_statistics",
+  "publish_topic": "platform/log_statistics"
 }
 ```