Appendix A. Running HATS applications on a zSeries Server

This appendix is intended to describe unique topics when running HATS applications on a zSeries server. It is expected that you also use HATS User's and Administrator's Guide and the HATS Programmer's Guide as sources of information on HATS, and that you review the HATS Readme.

Recommended settings for performance

To enhance performance of HATS applications running on a z/Series server, IBM recommends that you use the WebSphere administrative console to adjust certain settings and values. In the following list, server1 represents the name of your server.

• Set the Servers > Application Servers > server1 > ORB Service > Advanced Settings > Workload Profile value to LONGWAIT.

• For Servers > Application Servers > server1 > Server Instance > Multiple Instances Enabled, check the box.

• Set the Servers > Application Servers > server1 > Server Instance > Minimum Number of Instances to a valid number.

• Set the Servers > Application Servers > server1 > Server Instance > Maximum Number of Instances to a valid number.

• Set the Servers > Application Servers > server1 > Process Definitions > JVM > Initial Heap Size value to an appropriate value for your installation..

• Set the Servers > Application Servers > server1 > Process Definitions > JVM > Max Heap Size value to an appropriate value for your installation..

In addition, IBM recommends that you add the following variables under Manage WebSphere Variables and set the values as listed:

1. protocol_http_tcp_no_delay =1

2. protocol_http_max_persist request=1

3. protocol_http_timeout_input=0

4. protocol_http_timeout_output=0

5. protocol_http_timeout_persistentSession=0

6. wlm_stateful_session_placement_on=1