how do you measure percentage availability of Jira Data Centre?

[Darren]

We'd like to show that our Jira Service was available >=99.9% of the time over the previous 30 day interval (or, more advanced, over any interval e.g. 'this past year')

Is anyone here doing this for their on-premise Jira Data Centre service?

[Nic Brough -Adaptavist-]

For custom fields, just rename them. It won't damage anything, and you can put the longer text in their descriptions.

If you're talking about the built-in system fields, then I don't think you can realistically shorten them usefully. But if you want o try, have a look at http://confluence.atlassian.com/display/JIRA/Customizing+Text

If neither of those apply, then I'm sorry, I've misunderstood the question and I don't understand what you're trying to do.