How to get data of contact activities?

Hi all,

When trying to get data from ProcessedActivity of Base Entities, I always get 0 record.

Would it need any config to be changed to record the activities?

By the way, when trying to get Activities by RESTful API, I send requests with each contact id and each activity type of the 8 types (emailOpen, emailSend, emailClickThrough, emailSubscribe, emailUnsubscribe, formSubmit, webVisit, campaignMembership).

But every request would time out.

When getting Accounts and Contacts, it works well, and result records would be returned in several seconds.

So what should I do specially for Activities?

Any suggestions?

Thanks,

Biao