John Darrington <[EMAIL PROTECTED]> writes: > On Tue, Aug 02, 2005 at 07:10:15PM -0700, Ben Pfaff wrote: > John Darrington <[EMAIL PROTECTED]> writes: > > > Some time ago I did an experiment on PSPP sorting a data file with > > ~8 million records. It took about 20mins to do, but performed without > a hitch. > > How big was each record? > > 11 variables.
Let's set, that's about (8*11*8,000,000) / (1024*1024) = 671 MB. > What was the PSPP workspace size? > > Whatever the default is. 4 MB then. So it probably had to do about 671*4 MB or roughly 2.5 GB of disk activity. Not an unreasonable amount of time, then, but it would probably be much faster with a bigger workspace size. Perhaps we should try to size the workspace based on the machine's RAM size. -- "I don't want to learn the constitution and the declaration of independence (marvelous poetry though it be) by heart, and worship the flag and believe that there is a god and the dollar is its prophet." --Maarten Wiltink in the Monastery _______________________________________________ pspp-dev mailing list [email protected] http://lists.gnu.org/mailman/listinfo/pspp-dev
