Technical data

Tuning Techniques
2.1 Subsystem Attributes
2.1.1.2 Displaying the Attribute Values for a Subsystem
Each subsystem contains a set of attributes with associated values.
To display the attributes of a particular subsystem, include the -q option and
the name of the subsystem. For example, to display the attributes of the socket
subsystem, enter the following command:
TCPIP> sysconfig -q socket
socket:
sbcompress_threshold = 0
sb_max = 1048576
sobacklog_drops = 0
sobacklog_hiwat = 1
soinp_reuse = 1
somaxconn = 1024
somaxconn_drops = 0
sominconn = 1
TCPIP>
Subsystem attributes are specific to OpenVMS. Some UNIX attributes area not
supported on OpenVMS systems.
To determine whether an attribute is supported, use the -q option and specify
both the subsystem and the attribute.
If the subsystem is not configured,
sysconfig displays a message similar to the
following:
TCPIP> sysconfig -q inet tcbhashsize
framework error: subsystem ’inet’ not found
To display the maximum and minimum values for attributes, include the -Q
option and specify both the subsystem and the attribute. If you do not specify an
attribute, the system displays all the attributes for the specified subsystem.
Note
On OpenVMS, you must enclose any uppercase options in quotation
marks.
For example, to display the minimum and maximum values for the rexmtmax
attribute in the inet subsystem, enter the following command:
TCPIP> sysconfig "-Q" inet tcp_rexmtmax
inet:
tcp_rexmtmax - type=INT op=CRQ min_val=1 max_val=2147483647
TCPIP>
The sysconfig "-Q" command also displays the op code, which can consist of one
or more of the following:
• C, which indicates that the attribute can be configured
• R, which indicates that the attribute can be reconfigured
• Q, which indicates that the attribute can be queried
Tuning Techniques 2–3