Technical data

System Management Release Notes

5.16 System Parameters

• VCC_FLAGS (Alpha only)

• VCC_MAX_CACHE (Alpha only)

• VCC_MAX_LOCKS (Alpha only)

• VCC_WRITEBEHIND (Alpha only)

• VCC_WRITE_DELAY (Alpha only)

• VIRTUALPAGECNT

• XQPCTL2

• XQPCTLD1

You can read the new descriptions of these system parameters in online help. For

example:

$ HELP SYS_PARAMETERS FAST_PATH

5.16.5 Obsolete System Parameters

V7.3

Starting with OpenVMS Version 7.3, the following system parameters are

obsolete:

• MAXBOBS0S1

• MAXBOBS2

• NISCS_LAN_OVRHD

• PAGFILCNT

• SWPFILCNT

MAXBOBS0S1 and MAXBOBS2

Initially, the MAXBOBS0S1 and MAXBOBS2 parameters were intended to

ensure that users could not adversely affect the system by creating huge buffer

objects. However, as users began to use buffer objects more widely, managing the

combination of these parameters proved to be too complex.

Users who want to create buffer objects must either hold the VMS$BUFFER_

OBJECT_USER identiﬁer or execute in executive or kernel mode. Therefore,

these users are considered privileged applications, and the additional safeguard

that these parameters provided is unnecessary.

To determine current usage of system memory resources, enter the following

command:

$ SHOW MEMORY/BUFFER_OBJECT

5.17 Terminal Fallback Facility (TFF) (Alpha Only)

On OpenVMS Alpha systems, the Terminal Fallback Facility (TFF) includes a

fallback driver (SYS$FBDRIVER.EXE), a shareable image (TFFSHR.EXE),

a terminal fallback utility (TFU.EXE), and a fallback table library

(TFF$MASTER.DAT).

5–32 System Management Release Notes