Technical data

Preparing to Install and Configure TCP/IP Services
1.2 Preinstallation Tasks
1.2.7 Checking the System Parameters
Most systems have adequate system resources readily available to include the
TCP/IP Services software. However, you should check the system parameters
outlined in the following sections. Make any necessary changes to the
MODPARAMS.DAT file, then run AUTOGEN, and reboot your system.
1.2.7.1 Global Pagelets and Global Sections
The TCP/IP Services software requires 65 global sections and 8100 global
pagelets.
To check the number of available global pagelets and global sections, enter
WRITE commands with the F$GETSYI lexical functions. The following is an
example from an OpenVMS Alpha system:
$ WRITE SYS$OUTPUT F$GETSYI("FREE_GBLPAGES")
143576
$ WRITE SYS$OUTPUT F$GETSYI("FREE_GBLSECTS")
249
To increase the global pagelets and global sections, add statements to the
SYS$SYSTEM:MODPARAMS.DAT file that increase the values of the system
parameters GBLPAGES and GBLSECTIONS, as in the following example:
ADD_GBLPAGES = 7500
ADD_GBLSECTIONS = 75
1.2.7.2 Nonpaged Dynamic Pool
Add at least 500,000 bytes of nonpaged dynamic pool for the software, as follows:
1. Log in to the SYSTEM account.
2. Identify the amount of additional nonpaged pool your system requires. Use
the estimated value of 500,000 bytes, and then increase the value depending
on the maximum amount of sockets you have. For each socket, allow a value
of 2,000 bytes.
Note
On a system that uses FDDI, the default sizes for the TCP/IP socket
buffer quotas are increased automatically. This increases throughput
across the FDDI for local TCP connections.
3. Refer to the following example, and then edit MODPARAMS.DAT to reflect
the appropriate value for the NPAGEDYN and NPAGEVIR parameters:
! Add nonpaged pool for Compaq TCP/IP Services for OpenVMS.
!
ADD_NPAGEDYN=500000
ADD_NPAGEVIR=500000
For more information about nonpaged dynamic pool, see the OpenVMS System
Manager’s Manual: Essentials.
1–4 Preparing to Install and Configure TCP/IP Services