Preparing for Installation › Component Installation Requirements › CAIENF Requirements › CAIENF/USS Requirements › Define a New Object to VLF

Define a New Object to VLF

Defining a new object to the Virtual Lookaside Facility (VLF) can help improve the performance of certain CA Common Services for z/OS components.

To define a new object to VLF, add an entry to the COFVLFxx member of SYS1.PARMLIB, where xx is the VLF identifier that your systems programmer assigns.

Example: Define a New Object to VLF

CLASS NAME(CAENFU) /* ENF/USS pathname lookup cache*/
EMAJ(PATHCACHE)    /* Required major name*/
MAXVIRT(512)       /* 512 = 2MB*/

The class name (CAENFU) and major name (PATHCACHE) must be entered exactly as shown.

MAXVIRT in the range of 512 to 1024 (representing 2 MB to 4 MB of virtual storage) suffices for most sites. However, you can change MAXVIRT according to the following formula:

MAXVIRT = MAXFILEPROC * MAXPROCSYS * 16

MAXFILEPROC and MAXPROC are UNIX System Services configuration parameters that are found in SYS1.PARMLIB(BPXPRMxx).

The following lists the minimum storage requirements for each CAIENF/USS distribution library. This list does not necessarily represent the actual distribution library allocation that is provided during the installation.