> My blob segment size is default (will be enough if I change it to

1024

> or more?) ,

technically 1024>82 and it should be effected.. why don't you test
it?

>my db page size is 2048, my disc cluser size is 4kB

bad news..
your FB wants to read or write a 2048 bytes page from/to disc,
but OS does it as 4096 bytes disc IO. 1/2 of your disc IO is
unawared.

> I tested it with various file systems: reiserfs, ext3, win system

file

> but the situation is still the same.
> Any ideas what should i do now?

but all of them with default segment size ?

> regards
> Mat
>