Vmstat fault section all values are 0 Post: 302770336

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Operating Systems AIX Vmstat fault section all values are 0 Post 302770336 by MichaelFelt on Friday 15th of February 2013 09:25:12 AM

02-15-2013

Registered User

IMHO, this is not normal behavior. My first guess would be that a program has been restored, or a patch applied, and the libC and/or other shared library is not correct.

If I was on site and could look at other things I would recommend many other things - but for now, to remove many many variables in a short amount of time - AND to know if it is spurious or continous I would look at performing a reboot.

BUT!!! The other common cause of issues with libraries going bad, because they are cached in memory is either a disk gone bad (e.g. rootvg) so programs "run" but are in accurate because they cannot get/write to disk (e.g., a partition can run for hours even though it's rootvg is missing (VIOS is offline by accident) - or - that someone has done "rm -rf /..." by accident. So files are removed, but still open (shared libraries) so programs can still run "some".

Program to check: errpt

Code:

errpt | head

re: PID values. The long PID values imply that the 64-bit kernel is active so larger PID and TID values are normal

Code:

errpt -a | more

Code:

 
errpt -c

If you think the system will survive a reboot, and you can get a window to perform it - it is a serious option. But be careful - if your disk is bad and you cannot (re)boot you must decide beforehand what is worse: no availability or degraded integrity.

---------- Post updated at 04:25 PM ---------- Previous update was at 04:22 PM ----------

re: PID values. The 7-digit values imply that a 64-bit kernel is active.

MichaelFelt

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pfm_enable_faults(3ncs) 												   pfm_enable_faults(3ncs)

Name
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Syntax
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Description
       The routine enables asynchronous faults after they have been inhibited by a call to causes the operating system to pass asynchronous faults
       on to the calling process.

       While faults are inhibited, the operating system holds at most one asynchronous fault.  Consequently, when returns, there can  be  at  most
       one  fault waiting on the process.  If more than one fault was received between routines to and the process receives the first asynchronous
       fault received while faults were inhibited.

Diagnostics
       This section lists the status codes for errors returned by this routine.

       pfm_$bad_rls_order  Attempted to release a clean-up handler out of order.

       pfm_$cleanup_not_found
			   There is no pending clean-up handler.

       pfm_$cleanup_set    A clean-up handler was established successfully.

       pfm_$cleanup_set_signalled
			   Attempted to use pfm_$cleanup_set as a signal.

       pfm_$invalid_cleanup_rec
			   Passed an invalid clean-up record to a routine.

       pfm_$no_space	   Cannot allocate storage for a clean-up handler.

Files
See Also
       intro(3ncs), pfm_enable(3ncs), pfm_inhibit_faults(3ncs)

															   pfm_enable_faults(3ncs)

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