diff --git a/README.md b/README.md
index f929284..8fcaf7c 100644
--- a/README.md
+++ b/README.md
@@ -31,4 +31,10 @@ See the table below for the environment variable name, the configuration file pa
 | OWL_DB_USER   | /owl/conf/db/user   |               | MongoDB Username |
 | OWL_DB_PASS   | /owl/conf/db/pass   |               | MondoDB Password |
 
-<sup>1</sup> Set to 'off' to disable VSTP Updates.  Useful in testing as you cannot have two clients connected.
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+<sup>1</sup> Set to 'off' to disable VSTP Updates.  Useful in testing as you cannot have two clients connected.
+
+## Logging
+
+Logging is at INFO level.  The environment variable 'runtime' is checked.  If it is set to `debug`, then the log level will be set to DEBUG.
+
+If the environment variable 'perflog' is set to `on`, then the number of running goroutines and heap memory allocation will be printed to the console every two seconds.  Of course this is off by default.
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