Dear Sandeep Murthy,
I am running a GAP program (on a Mac Intel-dual core
running OS X Leopard) which has to search
in the space of all triples of subsets of a
given group of size n, this space being 2^(3n)
large. At present, it seems that if n > 6 then
GAP fails due to lack of permitted memory.
I suppose you get the GAP error message about running out of memory
and GAP ends in the brk>-loop.
This is triggered once GAP allocates more than 256MB of memory (the
limit is a few years old, one probably could set it higher for modern
machines), it is there to avoid a ``runaway'' GAP-process allocating
memory to a point that severely distresses a system also used for
other purposes at the same time. (If you call GAP with command line
option `-g', it will display the amount of memory allocated at each
garbage collection and give you an idea about its footprint.)
In principle, you could type
return;
and continue with more memory allocated but this is clumsy and
infeasible for batch jobs.
A better solution however would be to call GAP with the -o command
line option to set the warning level higher:
gap -o 1024m
would do 1GB for example. On a 2GB OSX machine I would probably keep
this around 1GB if you want to do other things (email, web browsing)
at the same time.
Hope this helps,
Alexander Hulpke
-- Colorado State University, Department of Mathematics,
Weber Building, 1874 Campus Delivery, Fort Collins, CO 80523-1874, USA
email: hul...@math.colostate.edu, Phone: ++1-970-4914288
http://www.math.colostate.edu/~hulpke
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