Re: Effects of setting linux block device readahead size - Mailing list pgsql-performance

Greg Smith wrote:
> Average seek time:      4ms
> Seeks/second:        250
> Data read/seek:        1MB    (read-ahead number goes here)
> Total read bandwidth:    250MB/s
>
Most spinning disks now are nearer to 100MB/s streaming.  You've talked
yourself into twice that, random access!

James