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.