Q:

Is XtraDB stable enough for production?

Is anyone using XtraDB (a MySQL build) from Percona?
The features & benchmark data looks nice. I wondered if it's stable enough for production.
What is your experience?

A:

"Stable for production" is always a subjective measurement.  If you are asking if people are using it in production, then yes, they are.
A lot of the major changes are disabled by default, and you need to turn them on for them to work.  For example - innodb_fast_recovery.  This means if you find a bug, it's very easy to take a step back.
The other point to mention, is that unless you use the Barracuda row format or enable the additional rollback segments feature - Percona releases have binary compatibility with the underlying data files with a 5.0 release.  Again, if you find a bug it is very easy to take a step back.
(I'm biased, I work for Percona).

