The default WEBrick server that runs when you launch Instiki is OK for light loads. For a more heavily-trafficked wiki, you might want to switch to Mongrel. Fortunately, this is extremely easy.
If you don’t already have Mongrel, install it,
% gem install mongrelFor Ruby 1.9.2, you need
% gem install mongrel --version '>=1.2pre'Then, just type
% ./instiki --daemonInstiki will start up using Mongrel instead of WEBrick.
See the general instructions for launching Instiki at startup. The same startup script should work, unmodified, with Mongrel.
Mongrel_clusterAs with WEBrick, you can proxy your Mongrel instance behind a conventional webserver, like Apache. For yet higher performance, you want to have multiple back-end processes to handle multiple simultaneous requests from the front-end webserver.
Nowadays, I think, the preferred technique for getting multiple back-end Instiki processes, running behind an Apache webserver, is to use Passenger.
Other options, for getting multiple Mongrel instances, include mongrel_cluster and Apache’s mod_proxy_balancer. But now you’ve plumbed the depths of my knowledge, so someone who’s actually used one of these will have to fill in the details.