[lsst-dm-stack-users] stack build can be *very* memory hungry -- default to fewer NCORES?

[Dustin Lang]

Actually, I'm finding that even after setting NCORES, MAKEFLAGS, and 
SCONSFLAGS both in my shell and in $EUPS_DIR/lib/eupspkg.sh, "eups distrib 
install" is STILL using four cores.

Please, how can I reduce the number of cores used by the build?

--dstn

On Wed, 25 Jun 2014, Dustin Lang wrote:

> 
> Hi,
> 
> On my Mac OSX 10.8 laptop with 4 cores and 8 GB of memory, the machine 
> becomes nearly unusable during the afw build.  I would think this would be 
> a fairly standard target machine for our users, so I would suggest that we 
> might want to highlight (and fix the errors in) the description of how to 
> make the build use fewer cores.  Or perhaps just crank down the default to 
> not fully max out the number of cores.
> 
> The instructions at the bottom of this page appear to be out of date:
> https://confluence.lsstcorp.org/display/LSWUG/Known+Installation+Issues+for+v8.0
> 
> since I don't see NCORES defined in my /usr/lsst/eups/lib/eupspkg.sh file, 
> nor MAKEFLAGS, and SCONSFLAGS doesn't mention explicitly the number of 
> cores to use:
> export SCONSFLAGS=${SCONSFLAGS:-"opt=3"}
> 
> 
> Thanks,
> --dustin
> 
>