On Mon, Jul 10, 2017 at 7:03 AM, Charles Nadeau <charles(dot)nadeau(at)gmail(dot)com>
wrote:
>
> The problem I have is very poor read. When I benchmark my array with fio I
> get random reads of about 200MB/s and 1100IOPS and sequential reads of
> about 286MB/s and 21000IPS.
>
That doesn't seem right. Sequential is only 43% faster? What job file are
giving to fio?
What do you get if you do something simpler, like:
time cat ~/$PGDATA/base/16402/*|wc -c
replacing 16402 with whatever your biggest database is.
Cheers,
Jeff