Last modified: 2014-05-29 16:17:15 UTC
This probably has to do with our crazy-ass algorithm, which computes allocations for every possible combination of criteria, then finds commonalities using a combinatorial search. :)
Depends if the current allocations are sufficiently memory intensive. Seems to consistently OOM (or not) for a given set of campagins/banners. i.e. was OOM for everyone that tried last night, now it's working.
https://gerrit.wikimedia.org/r/#/c/91824/