Monitoring File Locks

[Jim Adamson]

How can I monitor the number of file locks in hpux 11.11. The host is a C360 workstation.

We had a problem with sendmail this morning. The mail.log showed multiple message - 'Failed to lock /var/spool/mqueue (mail header number) with unexpected error. No locks available'.

I have increased nflocks from 200 to 800 and increased nfile from 3000 to 12000, and rebuilt the kernel.

The problem seems to have been caused by us receiving around 2000 junk messages this morning. This caused sendmail to fail and hpux problems. I'm now trying to strengthen the machine against this happening again. So how can I now check file lock usage.
thanks in advance,
Jim Adamson

[Pete Randall]

If you have Glance (and you really ought to), the System Tables Report will show you the nflocks info: current, high water mark, etc.


Pete

[Ross Zubritski]

Fire up Glance Plus and type "t". This will show you system tables.

Regards,

RZ

[Jim Adamson]

Guys, we do not have Glance Plus though I do have trial version on an application CD.

Any non-Glace methods available?
Jim

[Michael Steele_2]

Glance can get the information as below.

$echo "print tbl_file_lock_util " >> file

$glance -j 1 -i 1 -adviser_only -syntax test

You can what percent of the file lock table is in use with Kernel Resource Monitoring (KRM) which is available on the Support Plus CD.

"...sysdef..." will report nflock kernel parameters.

sysdef | grep -i nflock

[Dietmar Konermann]

1) Use a recent EMS version with KRM:

# resls -s /system/kernel_resource/file_system/nflocks
Contacting Registrar on hprtdd32

NAME: /system/kernel_resource/file_system/nflocks
DESCRIPTION: Percentage of file lock table consumption.
TYPE: /system/kernel_resource/file_system/nflocks is a Resource Instance
whose values are 64-bit floating point values.

There are no active monitor requests reported for this resource.

The current value of the resource is 2.343750


2) Use Q4, see Doc KBRC00008493
http://www4.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062909254

Best regards...
Dietmar.

[Ramkumar Devanathan]

Michael,

just correcting a typo -

$echo "print tbl_file_lock_util " >> file

$glance -j 1 -i 1 -adviser_only -syntax file

your post mentioned this -

$glance -j 1 -i 1 -adviser_only -syntax test

- ramd.
'cosmetic change...'