Hi,

I do have a problem running my app cause it needs more than 11 shared
memory segments, therefore I've set the env EXTSHM=ON according to the
man shmat with no effect. Anyone a suggestion what might be wrong.

regards

aixtest wrote:
> Hi,
>
> I do have a problem running my app cause it needs more than 11 shared
> memory segments, therefore I've set the env EXTSHM=ON according to the
> man shmat with no effect. Anyone a suggestion what might be wrong.
>
> regards
>

Just a suggestion.

Including what call is failing, what parameters you are passing to it
and what error you are getting would make your post much more lively
and interesting.

-- Jason

aixtest wrote:
> Hi,
>
> I do have a problem running my app cause it needs more than 11 shared
> memory segments, therefore I've set the env EXTSHM=ON according to the
> man shmat with no effect. Anyone a suggestion what might be wrong.
>
> regards
>
EXTSHM, AFAIK, doesn't give you more segments. It allows more
attaches to succeed, packing the shared memory regions/etc into
the available space. If you're working with 11 256 MB segments,
you've taken up all the space available.

On AIX 5.2, you can try using the DSA feature to free up segments
13 and 15, but you are still limited to the size of the 32-bit
address space, which allows 3.25 GB of shared memory regions.
No more. (Read up on LDR_CNTRL=MAXDATA=xxxxxxxx/DSA for more
info.

--
Gary R. Hook / AIX PartnerWorld for Developers / These opinions are MINE
__________________________________________________ ______________________

set SHMLBA_EXTSHM=1024 or some other value > 11

"Gary R. Hook" <nospam@nospammers.net> wrote in message
news:v9vWa.11891$z52.3596@newssvr22.news.prodigy.c om...
> aixtest wrote:
> > Hi,
> >
> > I do have a problem running my app cause it needs more than 11 shared
> > memory segments, therefore I've set the env EXTSHM=ON according to the
> > man shmat with no effect. Anyone a suggestion what might be wrong.
> >
> > regards
> >
> EXTSHM, AFAIK, doesn't give you more segments. It allows more
> attaches to succeed, packing the shared memory regions/etc into
> the available space. If you're working with 11 256 MB segments,
> you've taken up all the space available.
>
> On AIX 5.2, you can try using the DSA feature to free up segments
> 13 and 15, but you are still limited to the size of the 32-bit
> address space, which allows 3.25 GB of shared memory regions.
> No more. (Read up on LDR_CNTRL=MAXDATA=xxxxxxxx/DSA for more
> info.
>
> --
> Gary R. Hook / AIX PartnerWorld for Developers / These opinions are MINE
> __________________________________________________ ______________________
>