Instruction manual

Page 4-12 Chapter Four

Eagle 450 Installation and Technical Manual, Rev. 00

If you decide to change the amount of memory allocated to a job, or the memory pool, you can modify

the system initialization file following the instructions below.

Be very careful when changing memory allocations

. If your Eagle 450 uses AlphaTCP

networking, most of the memory could be used for AlphaTCP processes and users connected via

the network. Allocating memory incorrectly could make it impossible for some or all network

users to access the computer. Also, changing the memory for AlphaTCP processes or available

for network users may require changes to one or more of the AlphaTCP configuration files in

addition to the initialization file. Be sure to refer to the

AlphaTCP Administrator’s Guide

, DSO-

00187-00, before changing any aspect of AlphaTCP’s memory use.

Also, please refer to the

System Operator’s Guide to the System Initialization Command File

for

more information on SETJOB and SMEM.

Make a copy of the initialization file and edit it, as discussed previously.

To change the memory for a serial port or a background process, such as the AlphaTCP

TCPEMU server, scan through the file until you come to the SETJOB statement for that job. The

amount of memory for the job is immediately after the terminal name in the SETJOB statement.

You can increase or decrease this amount, as long as you keep in mind how much total memory

your computer has, and how much memory the other jobs, and the shared memory pool, need.

To change the amount of memory in the shared memory pool, find the SMEM statement; it

should be just after the last SYSTEM statement. Again, you can increase or decrease this

amount, but be sure to take all of your users’ memory needs into account.

Remember, the operator terminal—the one the computer boots on, connected to port #0—usually

gets all the memory not otherwise used. To increase the memory for this job, you need to

decrease memory use somewhere else; to decrease it, you can add memory to another job or the

memory pool.

You can assign a particular amount of memory to port #0 by using a FORCE command. If

you do this, any memory not assigned to any job or process is wasted.

When you’ve made your changes, save the TEST.INI file and exit AlphaVUE. Then, perform a

test reboot by running MONTST as described earlier in this chapter. You can then use the STAT

or SYSTAT command to see how much memory is assigned to each job.

SCSI Dispatcher Options

Like other computers in the Eagle family, the Eagle 450 uses a program called the SCSI dispatcher to

handle SCSI bus communication. The dispatcher for the Eagle 450 is called SCZ138.SYS. The provided

initialization file includes the command SCZDSP SCZ138.SYS to start the dispatcher. You may want to

add one or more of these options to that line: