Hello, I have noticed recently that Marketo is not A) Offering the optin to cache lists anymore and B) Smart lists are taking too long to run that some programs are failing. I have tried to optimize smart lists by using segmentations and avoid using operators such as 'not in' and 'contains' and nested smart lists but it is not really working. Any suggestions or is there some sort of an issue on marketo's side.
Try adding in a wait step in the Program for smart lists that are taking a long time to run - to prevent other programs from failing. Look at the order of data requested in the smart list - and try to optimize the order of operations of data requested -- biggest cut of data first, etc... Hopefully that will help :)