diff --git a/misc/munin/wormhole_transit b/misc/munin/wormhole_transit
index e7ba14f..d912044 100755
--- a/misc/munin/wormhole_transit
+++ b/misc/munin/wormhole_transit
@@ -4,10 +4,10 @@
 Use the following in /etc/munin/plugin-conf.d/wormhole :
 
 [wormhole_*]
-env.serverdir /path/to/your/wormhole/server
+env.usagedb /path/to/your/wormhole/server/usage.sqlite
 """
 
-import os, sys, time, json
+import os, sys, time, sqlite3
 
 CONFIG = """\
 graph_title Magic-Wormhole Transit Usage (since reboot)
@@ -19,15 +19,18 @@ bytes.type GAUGE
 """
 
 if len(sys.argv) > 1 and sys.argv[1] == "config":
-    print CONFIG.rstrip()
+    print(CONFIG.rstrip())
     sys.exit(0)
 
-serverdir = os.environ["serverdir"]
-fn = os.path.join(serverdir, "stats.json")
-with open(fn) as f:
-    data = json.load(f)
-if time.time() > data["valid_until"]:
+dbfile = os.environ["usagedb"]
+assert os.path.exists(dbfile)
+db = sqlite3.connect(dbfile)
+
+MINUTE = 60.0
+rebooted = db.execute("SELECT `rebooted` FROM `current`").fetchone()[0]
+if time.time() > rebooted + 5*MINUTE:
     sys.exit(1) # expired
 
-t = data["transit"]["since_reboot"]
-print "bytes.value", t["bytes"]
+value = db.execute("SELECT SUM(`total_bytes`) FROM `usage` WHERE `started` > ?",
+                   (rebooted,)).fetchone()[0]
+print("bytes.value", value)
diff --git a/misc/munin/wormhole_transit_active b/misc/munin/wormhole_transit_active
new file mode 100644
index 0000000..3799f6e
--- /dev/null
+++ b/misc/munin/wormhole_transit_active
@@ -0,0 +1,39 @@
+#! /usr/bin/env python
+
+"""
+Use the following in /etc/munin/plugin-conf.d/wormhole :
+
+[wormhole_*]
+env.usagedb /path/to/your/wormhole/server/usage.sqlite
+"""
+
+import os, sys, time, sqlite3
+
+CONFIG = """\
+graph_title Magic-Wormhole Transit Active Channels
+graph_vlabel Channels
+graph_category network
+waiting.label Transit Waiting
+waiting.draw LINE1
+waiting.type GAUGE
+connected.label Transit Connected
+connected.draw LINE1
+connected.type GAUGE
+"""
+
+if len(sys.argv) > 1 and sys.argv[1] == "config":
+    print(CONFIG.rstrip())
+    sys.exit(0)
+
+dbfile = os.environ["usagedb"]
+assert os.path.exists(dbfile)
+db = sqlite3.connect(dbfile)
+
+MINUTE = 60.0
+rebooted,waiting,connected = db.execute("SELECT `rebooted`,`waiting`,`connected`"
+                                        " FROM `current`").fetchone()
+if time.time() > rebooted + 5*MINUTE:
+    sys.exit(1) # expired
+
+print("waiting.value", waiting)
+print("connected.value", connected)
diff --git a/misc/munin/wormhole_transit_alltime b/misc/munin/wormhole_transit_alltime
index 459116b..25cbf4b 100644
--- a/misc/munin/wormhole_transit_alltime
+++ b/misc/munin/wormhole_transit_alltime
@@ -4,10 +4,10 @@
 Use the following in /etc/munin/plugin-conf.d/wormhole :
 
 [wormhole_*]
-env.serverdir /path/to/your/wormhole/server
+env.usagedb /path/to/your/wormhole/server/usage.sqlite
 """
 
-import os, sys, time, json
+import os, sys, time, sqlite3
 
 CONFIG = """\
 graph_title Magic-Wormhole Transit Usage (all time)
@@ -19,15 +19,17 @@ bytes.type GAUGE
 """
 
 if len(sys.argv) > 1 and sys.argv[1] == "config":
-    print CONFIG.rstrip()
+    print(CONFIG.rstrip())
     sys.exit(0)
 
-serverdir = os.environ["serverdir"]
-fn = os.path.join(serverdir, "stats.json")
-with open(fn) as f:
-    data = json.load(f)
-if time.time() > data["valid_until"]:
+dbfile = os.environ["usagedb"]
+assert os.path.exists(dbfile)
+db = sqlite3.connect(dbfile)
+
+MINUTE = 60.0
+rebooted = db.execute("SELECT `rebooted` FROM `current`").fetchone()[0]
+if time.time() > rebooted + 5*MINUTE:
     sys.exit(1) # expired
 
-t = data["transit"]["all_time"]
-print "bytes.value", t["bytes"]
+value = db.execute("SELECT SUM(`total_bytes`) FROM `usage`").fetchone()[0]
+print("bytes.value", value)
diff --git a/misc/munin/wormhole_transit_errors b/misc/munin/wormhole_transit_errors
new file mode 100644
index 0000000..182ab64
--- /dev/null
+++ b/misc/munin/wormhole_transit_errors
@@ -0,0 +1,49 @@
+#! /usr/bin/env python
+
+"""
+Use the following in /etc/munin/plugin-conf.d/wormhole :
+
+[wormhole_*]
+env.usagedb /path/to/your/wormhole/server/usage.sqlite
+"""
+
+import os, sys, time, sqlite3
+
+CONFIG = """\
+graph_title Magic-Wormhole Transit Server Errors (since reboot)
+graph_vlabel Events Since Reboot
+graph_category network
+errory.label Errory
+errory.draw LINE1
+errory.type GAUGE
+lonely.label Lonely
+lonely.draw LINE1
+lonely.type GAUGE
+"""
+
+if len(sys.argv) > 1 and sys.argv[1] == "config":
+    print(CONFIG.rstrip())
+    sys.exit(0)
+
+dbfile = os.environ["usagedb"]
+assert os.path.exists(dbfile)
+db = sqlite3.connect(dbfile)
+
+MINUTE = 60.0
+rebooted = db.execute("SELECT `rebooted` FROM `current`").fetchone()[0]
+if time.time() > rebooted + 5*MINUTE:
+    sys.exit(1) # expired
+
+count = db.execute("SELECT COUNT() FROM `usage`"
+                   " WHERE"
+                "  `started` > ? AND"
+                "  `result` = 'errory'",
+                (rebooted,)).fetchone()[0]
+print("errory.value", count)
+
+count = db.execute("SELECT COUNT() FROM `usage`"
+                   " WHERE"
+                "  `started` > ? AND"
+                "  `result` = 'lonely'",
+                (rebooted,)).fetchone()[0]
+print("lonely.value", count)