ASGAUR

How to Check Solaris Kernel bit (32 bit/64 bit)

To check if Solaris kernel is running in 32 bit mode or 64 bit from command line run the following:

# /usr/bin/isainfo –kv

64-bit sparcv9 kernel modules

The output "64 bit sparcv9" indicates that Solaris kernel is running in 64 bit mode. Here is the output of Solaris kernel running in 32 bit:

# /usr/bin/isainfo –kv

32-bit sparcv9 kernel modules

How to check Solaris kernel on x86 (Intel) platform :

# uname –m

i86pc

# /usr/bin/isainfo -kv

32-bit i386 kernel modules

In the example above Solaris Kernel is running in 32 bit on intel platform, printed as "32-bit" in the output.

How to check if Solaris kernel is configured to boot in 32 bit or 64:

The system is configured to boot the 64-bit kernel if the output from the eeprom command is either:

# /usr/sbin/eeprom | grep boot-file

boot-file: data not available

or

boot-file=kernel/sparcv9/unix

else if Solaris system is configured to boot using 32-bit kernel, the output from the eeprom command comes back as:

kernel/unix

Checking the UNIX Kernel

You can check the UNIX kernel with the following UNIX commands:
sysconfig -q ipc
sysconfig -q proc
sysconfig -q vm
Compare the output of these commands with the values in the list below.
Corrections of the kernel parameters are published in the installation notes.
These notes contain the most recent information regarding the installation.
We recommend that all Compaq Tru64 UNIX kernel modifications be performed by your system administrator.

Changing the UNIX Kernel

To change the system configuration defined in /etc/sysconfigtab:
1. Create a file named sapr3.stanza in any directory <path> (for example,
/etc/sapr3.stanza). It must contain the following lines for the subsystem entries ipc
and proc:
ipc:
sem-mni = 512
sem-msl = 512
sem-opm = 512
sem-ume = 512
shm-max = 2139095040
shm-mni = 512
shm-seg = 512
proc:
maxusers = 512
max-per-proc-address-space = 8589934592
max-per-proc-data-size = 8589934592
max-per-proc-stack-size = 268435456
max-proc-per-user = 512
per-proc-address-space = 8589934592
per-proc-data-size = 8589934592
per-proc-stack-size = 268435456

2. Insert the following lines for the subsystem entry vm into the file sapr3.stanza.
vm:
ubc-minpercent = 3
vm-ubcseqstartpercent = 3
ubc-borrowpercent = 3
ubc-maxpercent = 7
vm-maxvas = 17179869184
vm-vpagemax = 1048576
3. Use the following commands to newly add the three subsystem entries to
/etc/sysconfigtab:
sysconfigdb -a -f <path>/sapr3.stanza ipc
sysconfigdb -a -f <path>/sapr3.stanza proc
sysconfigdb -a -f <path>/sapr3.stanza vm
or if the subsystem entries are already present in /etc/sysconfigtab use:
sysconfigdb -u -f <path>/sapr3.stanza
to update the complete subsystem entries with your new settings in sapr3.stanza.
4. Reboot the system after changing the kernel parameters. Check the kernel parameter
settings after rebooting the system.

Manual Configuration of the Kernel

1. Change the kernel parameters according to the table Recommended Kernel Parameters

for HP-UX in the file

/stand/system

2. Generate a new kernel after making the changes using the following command:

mk_kernel -o /stand/vmunix -s /stand/system

3. Reboot your system.

Configuration of the Kernel Using SAM

• Enter the command

/usr/sbin/sam

• Select:

Kernel Configuration à Configurable Parameters

• Choose the parameter you want to modify and select:

Actions à Modify Configurable Parameter

• Modify all kernel parameters according to the table Recommended Kernel Parameters for HP-UX.

• Select Process New Kernel from the Actions menu.

• Exit SAM.

• Reboot your system.