"Jim C. Nasby" <jnasby@pervasive.com> writes:
> In my case it would be helpful to break the heap access numbers out
> between seqscans and index scans, since each of those represents very
> different access patterns. Would adding that be a mess?
Yes; it'd require more counters-per-table than we now keep, thus
nontrivial bloat in the stats collector's tables. Not to mention
incompatible changes in the pgstats views and the underlying functions
(which some apps probably use directly).
regards, tom lane