Common z/OS libraries

Db2 supports a configuration with a SYS1.PARMLIB and SYS1.PROCLIB that is shared by all z/OS® systems in the Parallel Sysplex®. This configuration lets you add and modify systems more easily.

If you intend to have many members in the Parallel Sysplex, each Db2 and IRLM that you define to the z/OS system in the IEFSSNxx parmlib member requires a z/OS system linkage index (LX). The default number of these indexes that z/OS reserves is 165. If you place all of your Db2 and IRLM subsystem definitions in a single IEFSSNxx member, you might need more than 165 LXs to start the members.

If you need more than 165 LXs, use the NSYSLX option on the z/OS IEASYSxx parmlib member to increase this number. For more information, see z/OS MVS Initialization and Tuning Reference.