>
> You're right that they are 8kB blocks (by default). But it's not read from
> disk, is more "postgresql asks the OS to give it the blocks". They may come
> from the disk, but they also may come from the OS disk cache. You can't
> find actual disk reads and writes from PostgreSQL.
>
Thanks.
That makes it a bit tricky then.
So my best bet might be running iostat on the physical server and
calculating Blk_read + Blk_wrtn for a period (4kb blocks in this case) and
using that to estimate how many 16kb IO's that might translate to on AWS's
RDS service for a month.
--
David