The default is 0.9, but it's often useful to set it to 1.0 for test utility methods (i.e. clearing all entities using a non-ancestor query in between unit tests).

This can be set in LocalGcdHelper.startGcd(..) using the following option:

--consistency=...
The fraction of job application attempts that will succeed, with 0.0 resulting in no attempts succeeding, and 1.0 resulting in all attempts succeeding. Defaults to 0.9. Note that setting this to 1.0 may mask incorrect assumptions about the consistency of non-ancestor queries; non-ancestor queries are eventually consistent.