Memory Issues....

[Dave Cast]

Does anyone know where I could find an memory issue on an HPUX 11.31 system?

I've checked /var/adm/syslog
dameon.log
kern.log
syslog.log

I received an error in Data Protector - that said "cannot allocate shared memory segement"

I've not been able to find anything in the above logs....

[Michael Steele_2]

Did you also try the MP event logs?
or /etc/opt/resmon/logs?
or cstm memory diagnostic?
or kmeminfo?
or dmesg?
or for and mca in /etc/tombstones?

When you get a "cannot allocate shared memory segement"

http://h30499.www3.hp.com/t5/ITRC-Data-Protector-Forum/80-1003-Cannot-allocate-attach-shared-memory-IPC-Cannot-Create/m-p/3370868#M33490

[Bill Hassell]

> I received an error in Data Protector - that said "cannot allocate shared memory segement"

Seems fairly straightforward. Check the shared memory kernel limit usage:

kcusage shmmax shmmni shmseg

This will show current and maximum settings. To look at the history for a day (-d) or for a month (-m):

kcusage -d shmmax shmmni shmseg

Data Protector needs a lot of shared memory space, especially for high performance tape drives. To see the current shared memory segments:

ipcs -bmop

[Vivek_Pendse]

Check the MP logs. Filter with alert level of "Warning". Also, cstm can tell you some thing.
As per the error, this is some thing different than actual memory issue; kernel tuning for shared memory parameters can resolve this issue.

Thanks,
Vivek

[Dennis Handly]

>cannot allocate shared memory segment
>I've not been able to find anything in the above logs.

This isn't a hardware error. It is a programming or sys admin error and as such, won't be logged.

What does "swapinfo -tam" show when you get the error?

[Manix]

you may track some memory consumers in hpux.

UNIX95=1 ps -ef -o vsz,rsz,cpu,pid,wchan,comm | sort -rn 10 | head 10

ipcs -mac

should give you the owner and the creator of the process using that shared memory segment.

kcusage -d shmmax will so the usage of the segment & it`s size as well !!.


Thanks
Manix