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Kill with rollback estimation

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It's always amazing when you find something new in something so common that you thought you knew so well. When resolving the compilation bottleneck issue I mentioned in the previous 2 posts, I had to use the kill command. It's actually incredibly rare that I use this command, as I really don't believe in it in principal in production if at all avoidable. Anyway in that particular situation it just had to be done. The session that we were killing was doing a huge update, and as such it had to rollback and it was going to take a while (I could guess this from the fact that it had 39 million locks!). However I'd never noticed that the kill command now comes with a rollback estimation syntax. Definately a good feature, but not one to abuse :-)

From BOL, it looks like this:

KILL 54 WITH STATUSONLY;
GO

--This is the progress report.
spid 54: Transaction rollback in progress. Estimated rollback completion: 80% Estimated time left: 10 seconds.

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