who/what is using nflocks

[Ben Thomas]

Is there any way of easily determining which processes are using file locks? We have an HP-UX 11.11 systems in which the nflocks jumped from 10% to 99% and I would like to know why!

-ben-

[RAC_1]

check *.lck files.

You may get some idea on that.

[Robert-Jan Goossens · Accepted solution]

Hi,

HPUX OS: Determining nflock Usage Using lsof

http://www4.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062907652

lsof 11.11

http://www.mirrors.wiretapped.net/security/host-security/lsof/binaries/hpux/B.11.11/

Robert-Jan.

[A. Clay Stephenson]

The most straightforward method is to install lsof (available from any of the HP-UX Porting Centre's).

Databasea very commonly use locks and many locks can be in place on the same file.

[Ben Thomas]

Thanks. We run lsof, but did not understand the FB column. Help is much appreciated.

-ben-

[Ben Thomas]

Hmm. lsof reports 119 file locks, but glance -t shows:
File Locks (nflocks) 2048 1993 97 98
i.e. 1993 locks. I assume the other locks are database record locks.... Is there anyway to also show these at the OS level?