Tru64 v4.0f Patchkit 6 - problems changing kernel parameters

From: REEVE Ruth <RREEVE_at_goldcoast.qld.gov.au>
Date: Thu, 06 Sep 2001 09:11:37 +1000

Hi All,

I have searched the archives but haven't had any luck with this problem


Before installing onto our production machines (Alpha 4100 cluster with
TCR1.6)
I have installed v4.0f patchkit #6 onto a test box (a Digital Personal
WorkStation 600au DECST30) which had v4.0f patchkit #5 already
installed on it. The patchkit installed fine with no errors.

However after the install, I noticed that some of the kernel
variable values were changed (back to the defaults I assume)
even though our settings for these variables were present in
the /etc/sysconfigtab file.
eg. maxusers was changed to 32 (we had it set at 2048)
    max-proc-per-user was changed to 64 (we had it set to 512)
This has happened to attributes from various subsystems (ie. ipc,
proc, socket, advfs,inet, vfs, vm, pwrmgr)

I tried to change these variables back to our previously set values
using the follwoing commands :-

/sbin/sysconfigdb -d -t /etc/sysconfigtab ?subsystem

/sbin/sysconfigdb -a -t /etc/sysconfigtab -f
/usr/local/bin/sysparams.mod ?subsystem

doconfig -c ?MACHINENAME

moved in the new /vmunix file and rebooted

This produced no errors, but the attributes values did not change.
The only way I can change an attribute value is by using the command
sysconfig -r ?subsystem ?attribute=?value
But this gets reset on the next reboot.

Has anyone seen a problem like this???
Many thanks
Ruth

(note: the format of the /usr/local/bin/sysparams.mod file is as
follows)
proc:
        maxusers = 2048
        max-proc-per-user = 512
        max-threads-per-user = 4096

ipc:
        shm-mni = 1024
        shm-seg = 256
        shm-max = 67108864


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Received on Wed Sep 05 2001 - 23:12:25 NZST

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