Overhead |
Specifies the I/O controller overhead and disk
seek and latency time. This value is used to determine the cost of
I/O during query optimization. The value that you specify is a number-of-milliseconds value, and can be any numeric literal
(integer, decimal, or floating point). |
Device Read Rate |
Specifies the time to read one page into memory.
This value is used to determine the cost of I/O during query optimization.
The value of number-of-milliseconds can be any numeric literal (integer,
decimal, or floating point). |
Data Tag |
Specifies how often data is accessed (a data
"temperature" value between “hot" or “cold"). You can specify a number
from 1 to 9, where 1 is "hot" (accessed most often), and 9 is "cold"
(should be accessed least often). The number that you specify should
match the number that you specified in the InfoSphere® Optim™ Configuration Manager product when you specified the data
tag. |