.-EAS--=--509----------------. >>-+----------------------------+------------------------------>< '-EAS--=--number_of_sessions-'
statements: | GROUP, APPL |
dependencies: | none |
range: | 0–65535 |
Specifies the estimated number of concurrent sessions this application program will have with other logical units (LU-LU sessions). VTAM® uses this operand in a search to find the representation of a session between the application program and a logical unit.
The specified value should include LU 6.2 sessions and non-LU 6.2 sessions.
Accurate coding of the EAS value for your applications can save storage in your system. For example, if you estimate that there will be less than 30 sessions with this application, but you let the EAS value default to 509, then an extra 4K table will be allocated from common storage. The size of the table is based on the EAS value that you code and is determined as follows:
Table size | EAS value |
---|---|
4K | 30–4000 |
8K | 4001–8000 |
16K | 8001–16000 |
32K | 16001–32000 |
64K | 32001–48000 |
128K | 48001–56000 |
256K | 56001–64000 |
512K | greater than 64000 |
If your EAS value is specified as lower than the number of sessions that you actually have, sessions would still be established as usual. However, the efficiency of searching for the session representation could be impaired if a smaller table was allocated because of the lower EAS value.