Some praise for Site24x7.
Dustin Sallings lays out a nice list of simple, non-pid-polling process supervision techniques available on various Unix and Linux environments. Great reference. I’m pretty sure the /etc/inittab respawn directive is one of the most underrated utilities in Linux server environments.
Nice little self-contained perl script that shows a basic memcached top display for a list of servers.
$ curl http://memcache-top.googlecode.com/files/memcache-top-v0.6 >
~/bin/memcache-top
$ chmod +x ~/bin/memcache-top
$ memcache-top --sleep 1 --instances memcache1,memcache2,memcache3
That gives you this:

Nifty.
I repackaged mongrel_proctitle as a GemPlugin so that all mongrels on use it automatically. This is the first chance I’ve had to play with GitHub, too. Lovin' it.
Constantly updates the the process title ($0) with something like: “mongrel_rails [10010/2/358]: handling 127.0.0.1: HEAD /feed/calendar/global/91/6de4”. Let’s you monitor backends with ps and top.
Nifty combo.