Any TK module that is marked reentrant can be placed in the LPA. The following is a list of names and sizes of TK modules loaded during SAS initialization plus some BASE SAS proc usage. Placing some or all of these modules in the LPA might achieve some performance improvement.

Module	Size (hex)
tkmvsenv	000A68
tknls	093F30
tknlsldb	14D320
tknlssb	00D4C8
skndns	008058
tkarm	00E640
tkelm	003228
tkioe	017838
tksecure	0109E8
tkeutil	0072E0
tkiohq	001138
tkiomen	002FB0
tkiomsvc	0335A8
tkexml	038B80
tkepdl	0082B8
tkperf	001738
tkiomjnl	0025C8
-- other common modules --
tkiop	023968
tkequ	005FE0
tkefd	00E9F8

You might find other high-use TK modules depending on the code you execute during submission of your SAS jobs. You can see the attributes and sizes of all modules from an ISPF list of the SAS load library. If the module in question is marked reentrant (RN), it is a candidate for placement in the LPA.

TK modules are not bundled together and renamed for placement in the LPA. Therefore, if you are running multiple versions of SAS, only one set of TK modules may reside in the LPA.

Additional notes about TK modules:

• Most TK modules have RMODE ANY and can be placed in ELPA.
• Most TK modules are reentrant and are eligible for the LPA.
• The greatest benefit is gained by placing the most frequently loaded reentrant TK modules into the LPA.