Have you ever been editing a card in Mingle and you lose your data because the session timed out? Well, if you are comfortable editing a config file in <mingle directory>/config/web.xml you can make the session timeout much longer. Here is what it looks like by default:
You can change it to be something like this:
That works out to be around 4 days for the timeout, so all you need to do now is restart Mingle on the server and you shouldn’t be bothered by it any more.