.-NUMTREES--=--100-------------------------. >>-+------------------------------------------+---------------->< | (1) | '-NUMTREES--=--number_of_routing_trees-----'
Notes:
- NUMTREES is meaningful only if the NODETYPE=NN start option is also used.
| range: | 2–10000 |
Specifies a limit on the number of routing trees retained in the topology and routing services tree cache. Topology and routing services uses the trees when it receives requests for session routes. When the limit is reached, the oldest unused routing trees are discarded.
Setting a high number for NUMTREES makes session setup faster, but takes up more storage than a low number. If needed, you can free some storage by setting a lower number for NUMTREES, but session setup will then take longer because routes will have to be calculated.
You can change the value of NUMTREES with the MODIFY VTAMOPTS command while VTAM® is running.