----- Original Message ----- From: "Jan Wieck" <[EMAIL PROTECTED]> > Tom Lane wrote: > > Gaetano and a couple of other people did experiments that seemed to show > > it was useful. I think we'd want to change the shape of the knob per > > later suggestions (sleep 10 ms every N blocks, instead of N ms every > > block) but it did seem that there was useful bang for little buck there. > > I thought it was "sleep N ms every M blocks". > > Have we seen any numbers? Anything at all? Something that gives us a > clue by what factor one has to multiply the total time a "VACUUM > ANALYZE" takes, to get what effect in return?
I have some time on sunday to do some testing. Is there a patch that I can apply that implements either of the two options? (sleep 10ms every M blocks or sleep N ms every M blocks). I know Tom posted the original patch that sleept N ms every 1 block (where N is > 10 due to OS limitations). Jan can you post a patch that has just the sleep code in it? Or should it be easy enough for me to cull out of the larger patch you posted? ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])