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kctune(1M)
next_default
This field contains a 'y' if the tunable is set to its default value at next boot, or an 'n'
otherwise. This field is not printed for saved configurations.
before_default
This field contains a 'y' if the tunable was set to its default value before this invocation
of
immediate value change has been made during the current invocation of
signed
This field contains a 'y' if the tunable values should be treated as signed integers, or
an 'n' otherwise.
This field contains a hexadecimal representation of the bitmask containing the
flags
dynamic
ers. See
tional flag values may be defined in future releases or patches.
The special field name
put. The output may include fields not listed in this man page. The fields will be listed in unspecified
order.
Additional fields may be added in future releases or patches.
Default Output
When
is called with no options, it shows all tunables associated with the kernel modules (as well
kctune
as the user-defined tunables), their current values, expressions used to compute those values, and when
changes can be made to these tunables. If there are changes that are being held for nextboot, they will be
shown as well.
On a typical system, the expression for most tunables are marked
tor is allowing the system to choose the tunable value. The changes column shows the restrictions on when
the tunable value can be changes. Tunables whose value can be changed immediately are marked
Tunables whose values are being automatically tuned by the system are marked
tor has disabled the automatic tuning by the system the tunable is marked
The tunables which have nothing in the changes column can only be changed with a reboot.
The layout and content of the default output may change in future releases or patches of HP-UX. Scripts or
applications which need to parse the output of
RETURN VALUE
returns one of the following values:
kctune
0
was successful. If
kctune
changes being held for next boot.
1
was successful. However, there were changes requested to the currently running system
kctune
which cannot be applied until the system reboots. Therefore, all of the requested changes are being
held until next boot.
If
was specified, this return value indicates that there are tunable changes being held for next
-D
boot.
2
was not successful.
kctune
WARNINGS
kctune
always checks the validity of tunable values before applying them to the running system. When
tunable value changes are held for next boot, or made to a saved configuration, some of the validity checks
are not performed until the changed configuration is booted. If any tunable values are found to be invalid,
messages will be printed to the system console during the boot process, and the default values for any
affected tunables will be used instead.
EXAMPLES
To see all tunables and their current values:
$ kctune
To see which tunables have new values being held until next boot:
$ kctune -D
To see verbose information about a tunable:
$ kctune -v tunablename
HP-UX 11i Version 2: December 2007 Update
kctune
, or an 'n' otherwise. This field is present only for tunables for which an
,
,
canauto
default
/usr/include/sys/dyntune.h
ALL
may be specified to indicate that all defined fields should be included in the out-
kctune
was specified, this return value indicates that there are no tunable
-D
− 4 −
,
, and
auto_default
signed
for definitions of flag values. Addi-
Default
meaning that the administra-
Auto
Imm (auto disabled)
must use the
-P
option for parsable output.
Hewlett-Packard Company
kctune(1M)
.
kctune
flags, among oth-
Immed
.
. If the administra-
.
435
k
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