Add available RAM to statsd
If the executor is using it to decide whether to accept jobs, we
should graph it.
Change-Id: If34e81f953df4ed0a2c2c287e7d00d4977267fef
diff --git a/doc/source/admin/monitoring.rst b/doc/source/admin/monitoring.rst
index e6e6139..81275f3 100644
--- a/doc/source/admin/monitoring.rst
+++ b/doc/source/admin/monitoring.rst
@@ -146,6 +146,12 @@
The one-minute load average of this executor, multiplied by 100.
+ .. stat:: pct_available_ram
+ :type: gauge
+
+ The available RAM (including buffers and cache) on this
+ executor, as a percentage multiplied by 100.
+
.. stat:: zuul.nodepool
Holds metrics related to Zuul requests from Nodepool.