diff --git a/doc/source/admin/monitoring.rst b/doc/source/admin/monitoring.rst
index 55f1908..e6e6139 100644
--- a/doc/source/admin/monitoring.rst
+++ b/doc/source/admin/monitoring.rst
@@ -224,6 +224,49 @@
 
       The number of outstanding nodepool requests from Zuul.
 
+.. stat:: zuul.mergers
+
+   Holds metrics related to Zuul mergers.
+
+   .. stat:: online
+      :type: gauge
+
+      The number of Zuul merger processes online.
+
+   .. stat:: jobs_running
+      :type: gauge
+
+      The number of merge jobs running.
+
+   .. stat:: jobs_queued
+      :type: gauge
+
+      The number of merge jobs queued.
+
+.. stat:: zuul.executors
+
+   Holds metrics related to Zuul executors.
+
+   .. stat:: online
+      :type: gauge
+
+      The number of Zuul executor processes online.
+
+   .. stat:: accepting
+      :type: gauge
+
+      The number of Zuul executor processes accepting new jobs.
+
+   .. stat:: jobs_running
+      :type: gauge
+
+      The number of executor jobs running.
+
+   .. stat:: jobs_queued
+      :type: gauge
+
+      The number of executor jobs queued.
+
 
 As an example, given a job named `myjob` in `mytenant` triggered by a
 change to `myproject` on the `master` branch in the `gate` pipeline
diff --git a/zuul/scheduler.py b/zuul/scheduler.py
index c0915ed..8db9e46 100644
--- a/zuul/scheduler.py
+++ b/zuul/scheduler.py
@@ -214,7 +214,7 @@
     """
 
     log = logging.getLogger("zuul.Scheduler")
-    _stats_interval = 10
+    _stats_interval = 30
 
     def __init__(self, config, testonly=False):
         threading.Thread.__init__(self)