ADD CELLS/XMSCELLS - Teradata Director Program

Teradata® Director Program Reference

Product
Teradata Director Program
Release Number
17.00
Published
June 2020
Language
English (United States)
Last Update
2020-06-18
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B035-2416
lifecycle
previous
Product Category
Teradata Tools and Utilities

Purpose

Adds cells of main memory to a TDP for its internal use.

The ADD XMSCELLS command can be specified in the z/OS environment to increase the number of cells reserved for use by the IOMODE PC interface to transfer data between the application and TDP address spaces.

Except for a small number of cells used for specialized purposes, all cells are allocated from 31bit storage.

Syntax



where:

CELLS
Specification that the maximum number of cells are to be increased.
XMSCELLS
Specification that the number of cells reserved for use by the IOMODE PC interface are to be increased.
cellsize
Size, in decimal, of the cells to be added.

Range is 1 through 32760.

number_of_cells
Number, in decimal, of cells to be added.

Size range is 1 through any multiple of 16.

Usage Notes

The ADD CELLS and ADD XMSCELLS commands can be used to improve TDP throughput when throughput has degraded. Use the DISPLAY CELLS command to display excessive GETMAIN or wait counts, which can reduce TDP throughput.

Note that the size argument must specify an existing cell size. To obtain the cell size, issue the DISPLAY CELLS command. Add numberofcells to the cellsize cell pool by issuing the ADD command.

XMSCELLS are used in z/OS only.

Example: ADD CELLS/XMSCELLS

ADD CELLS SIZ 80 NUM 16

Completion Message

TDP0527 16 MEMORY CELLS OF SIZE 80 SUCCESSFULLY ADDED