For performance reasons, if you anticipate that a particular logical unit can have more than 256 sessions, increase the value of the EAS operand to the nearest multiple of 256. For example, if you anticipate 700 sessions for a particular logical unit, you should define EAS to be 768 (3 x 256). Coding a poor estimate for EAS does not affect your sessions, but it does affect performance.

You can define the EAS operand for an independent logical unit only.