*** Reply to note of Wed, 22 Feb 1995 10:04:25 EST
*** by ADSM-L AT VM.MARIST DOT EDU

Kees,

There are several parameters you should look at tuning to achieve better
throughput.  Here are the important ones with some suggested values:

 VTAM RUSIZE=8989 which means   4096 inbound and 4096 outbound

 VTAM MAXDATA of 4105  (4096 plus 9 for TH and RH)
 NCP MAXTSL of 4105 to match MAXDATA
 NCP RCVBUFC of 4200 to allow for Token Ring headers and trailers

 OS/2 MAX RU of 4096
 OS/2 Transmit buffer of 4120
 OS/2 Receive buffer size of 2048 (max allowed) with minimum of 5
 OS/2 Send and receive window of 8

Note that you may need to compromise on the parameters to achieve a
balance between good response times for interactive (LU2) sessions and
max throughput for high volume data transfer.

Chris

GPL Client/Server Development
Endicott, NY
(USIB2P9W at IBMMAIL)
(Internet zaremba AT gdlvm7.vnet.ibm DOT com)