Gregory Stark <[EMAIL PROTECTED]> writes: >> For "Server Drives" 3-4ms are more realistic ([2], [3]) for average seeks and >> the 110-170MB/sec are highly exaggerated. > > In that case both of those numbers come straight from Seagate's data sheet for > their top-of-the-line data centre drives: > > http://www.seagate.com/docs/pdf/datasheet/disc/ds_cheetah_15k_6.pdf
Oh, but I just noticed they separately quote latency and read/write seek time. The average read seek time is 3.4ms. That gives a random_page_cost of 45-71. -- Gregory Stark EnterpriseDB http://www.enterprisedb.com Ask me about EnterpriseDB's PostGIS support! -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
