> > I'll look into it, but I was already wondering if we shouldn't bound
> > the number of tapes somehow. It's a bit hard to believe that 28000 > > tapes is a sane setting. > > Well, since they are not actually tapes, why not? I wonder what the OS does when we repeatedly open and close those files because we are short on filedescriptors ? Will it replace cached pages of a file that we have closed *more* aggressively ? Maybe we should limit the files to how many files we would actually be able to hold open in parallel ? Or keep more that one "tape" in one file and remember a start offset into the file per tape. Andreas ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match