Olleg Samoylov <olleg_s(at)mail(dot)ru> writes:
> I try to test this. Linux, memory page 4kb, disk page 4kb. I set BLCKSZ
> to 4kb. I get some performance improve, but not big, may be because I
> have 4Gb on test server (amd64).
It's highly unlikely that reducing BLCKSZ is a good idea. There are bad
side-effects on the maximum index entry size, maximum number of tuple
fields, etc. In any case, when you didn't say *what* you tested, it's
impossible to judge the usefulness of the change.
regards, tom lane