[Veritas-bu] semaphore issue

Actually, the Solaris 10 system defaults are higher, leading Sun to say that many of the values are obsolete, but they really aren't.

An example is the msgmnb setting - the "official" Solaris tuning guide from Sun states that it's obsolete. But run an ipcs sometime on your master running netbackup, without the /etc/system parameter in place in that file the message queue size is 65536.

Then change the kernel parameter to say twice the current value (131072, if using mdb to make the change you still need to recycle the processes) note the size has increased after recycling/

I also work for Symantec and if you call Sun and talk to a kernel engineer, they will admit they really haven't obsoleted the values so that o/s actually ignores them.

Ok - so really - on to problem (just trying to dispell the myth).

I haven't seen that issue before, but prior to starting the process's - are there any 'stale' semaphores left in ipcs?

What does the ltid log say (i.e. in /usr/openv/volmgr/debug)?

Can you try to start it using truss?

Does a reboot help?

Is anything in maintenance mode that shouldn't be when you run svcs -a?

Also make sure that your /etc/system file doesn't actually have any of the semaphore settings in there (typically the default semaphore settings on solaris 10 are just fine - although SUN HAS recommended additional settings on occassion - see the following technote :http://support.veritas.com/docs/295295).

Hope that helps.

________________________________

From: veritas-bu-bounces AT mailman.eng.auburn DOT edu

[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Dominik

Pietrzykowski

Sent: Friday, January 25, 2008 6:20 PM

To: VERITAS-BU AT mailman.eng.auburn DOT edu

Subject: [Veritas-bu] semaphore issue

Anyone seen this on a Solaris 10 server ????

# ltid -v

# Error in getting semaphore

Ltid keeps on dieing and it complains about semaphores. My other

Solaris

10 servers are fine but I have two with this issue.

Both use different hardware and no you don't need to tune the kernel on

Solaris 10 as it's defaults are much bigger than anything Symantec

recommend.

Hope someone can help.

Thanks,

Dominik

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