Due to an interrupted ontape restore, I was left with a down
informixserver with its shared memory segments still being reported by
ipcs. I carefully removed all the segments using ipcrm, being careful
not to remove any used by the other two instances on the host, but
when I removed a semaphore segment from the fouled instance, the other
two abruptly crashed with "Assert Failed: semop: errno = 36" messages
appearing in the Informix message logs for each.

Has anybody else experienced this? I can find no mention of this
behavior in Informix manuals, online, etc. I assume that in some way
the other instances are using that segment of memory.

Using IDS 11.50.FC4 on HPUX 11.23 (memory management with this O/S has
always seemed problematic).

See the new "onclean" command which does the equivalent of "ipcrm" for
you but more safely!

Regards,
Doug Lawry

On 14-12-2010 13:41, red_valsen wrote:
errno 36 is "removed identifier".
I never experienced this.
It's hard not to think that you removed the wrong set...
On the other hand you say you had other two instance crashing... It
would be easier to accept a mistake if it only affected one...

This would never be mentioned in the manuals, because if anything it
would be a bug...

Please use onclean as already suggested.
Regards.

On Dec 15, 11:22*pm, Fernando Nunes <domusonl... (AT) gmail (DOT) com> wrote:
Anyone remember who RVH was again (0x525648). What was his actual name
rather than just the bloke who worked on memory. Ron ...?

http://publib.boulder.ibm.com/infoce...admin_1218.htm
http://publib.boulder.ibm.com/infoce...s_adr_1073.htm

On Sat, Dec 18, 2010 at 06:35, PeterP <peterpain (AT) gmail (DOT) com> wrote:

Roy V Harrington, one of the co-founders of Relational Database Systems, RDS
- the original name of the company that produced C-ISAM and Informix.

--
Jonathan Leffler <jonathan.leffler (AT) gmail (DOT) com> #include <disclaimer.h>
Guardian of DBD::Informix - v2008.0513 - http://dbi.perl.org
"Blessed are we who can laugh at ourselves, for we shall never cease to be
amused."