Jim Nasby <jnasby@xxxxxxxxxxxxx> writes: > While working on determining a good stripe size for a database, I > realized it would be handy to know what the average request size is. > Getting this info is a simple matter of joining pg_stat_all_tables > and pg_statio_all_tables and doing some math, but there's one issue > I've found; it appears that there's no information on how many heap > blocks were read in by an index scan. Is there any way to get that info? If the table is otherwise idle, the change in the table's entry in pgstatio_all_tables should do, no? (This is as of 8.1 ... older versions acted a bit differently IIRC.) regards, tom lane
