Tom Lane wrote: > Bruce Momjian <[EMAIL PROTECTED]> writes: > > Greg Stark wrote: > >> Actually the sort algorithm postgres uses would be much more efficient if it > >> could get access to two or three locations guaranteed to be on different > >> spindles. > > > Agreed, and I was going to mention the idea of a round-robin allocation > > setup where the system cycles through a list of possible locations for > > both sort files and temporary tables. > > Greg's point was that sort would want to *know* that it created three > temp files on three different devices. Throwing random effects of other > sessions into the mix wouldn't make it better.
OK, let's say the sort starts on a random tablespace and then goes sequentially through the list: * Add a GUC variable to control the tablespace for temporary objects and sort files It could start with a random tablespace from a supplied list and cycle through the list. -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster