vimvars: maxmem+maxmemtot dflt: xxkB or .5*totmem, whichever is what?: larger|smaller?

subject is the question. for vim vars', maxmem, maxmemtot,
default is says XX(some os dependent value in kB) or half of memory.

Doesn't say if it picks smallest or largest.

Like: for read-only files , only create a swapfile
if it needs more than the given 'maxmem' or 'maxtotmem'.

Might make sense in some cases to use .5*(totmem), but
not so much these days. Might make more sense to use
.5*(tot_availmem), but even that might not be good on
systems with many background processes that vary, largely
on the amount of memory used.

So first Q is, "for default, does it use the smaller or larger
value?"

If it uses "freemem", does it add the cache-memory
back to 'free' to get the "real free"

Thanks




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