There are all kinds of hacks and things required to manage a very large number of FIDs. How many FIDs do you have (as opposed to the 100GB+ storage space they require) ?

I'm not "one with" the search engine here, but most others manage it just fine, and there are some good threads on dealing with big (for the empeg) drives.

One possible starting place is to search for "set_empeg_max_fid".