diff --git a/config-joey.hs b/config-joey.hs
index 3f0d515..6d3505e 100644
--- a/config-joey.hs
+++ b/config-joey.hs
@@ -224,9 +224,11 @@ hosts =                 --                  (o)  `
 	  in GitAnnexBuilder.androidContainer dockerImage "android-git-annex" doNothing gitannexdir
 		& Docker.volume ("/home/joey/src/git-annex:" ++ gitannexdir)
 
-	-- temp for an accuantance
+	-- temp for an acquantance
 	, standardContainer "voltagex" Stable "amd64"
 		& Docker.publish "22022:22"
+		& Docker.memory "500m"
+		& Docker.cpuShares 1
 		& Apt.serviceInstalledRunning "ssh"
 		& Ssh.permitRootLogin True
 		& Ssh.passwordAuthentication True
diff --git a/src/Propellor/Property/Docker.hs b/src/Propellor/Property/Docker.hs
index adaea54..fa3e234 100644
--- a/src/Propellor/Property/Docker.hs
+++ b/src/Propellor/Property/Docker.hs
@@ -244,6 +244,9 @@ memory :: String -> Property
 memory = runProp "memory"
 
 -- | CPU shares (relative weight).
+--
+-- By default, all containers run at the same priority, but you can tell
+-- the kernel to give more CPU time to a container using this property.
 cpuShares :: Int -> Property
 cpuShares = runProp "cpu-shares" . show