Bruce Momjian <bruce@xxxxxxxxxx> writes: > Matthew Wakeling wrote: >> Does it really take that long to zero out 8kB of RAM? I thought CPUs were >> really quick at doing that! > Yea, that was my assumption too. You have to write the page (to be sure there is space for it on disk) not only zero it. This design is kind of a holdover, though, from back when we had one ever-growing clog file. Today I'd be inclined to think about managing it more like pg_xlog, ie, have some background process pre-create a whole segment file at a time. regards, tom lane
