well, that wasn't necessairly a database but ok.
> Say that page tables need 0.1% of the space of the virtual
> space they map. With 1000 Oracle users you'd end up needing
> as much memory in page tables as your shm segment is large.
so just add more ram, ram is cheaper than cpu power (I mean, on 64bit)
> Of course, in this situation either the application should
> use large pages or the kernel should simply reclaim the
as you say, it should definitely use largepages if it's such kind of
usage, so the whole point of saving pte space is void. it should use
largepages even if it's not "many tasks mapping the shm", but just a
single task mapping some huge ram.
> Agreed on that. Please let the monstrosity die together
> with 32 bit machines ;)
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to firstname.lastname@example.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/