>  behaviour in the situation like yours. Because you can't set upper memory
>  limits for buffer cache size, you could try to dig in tech-kern archives and
>  to look for the patches from Lars Heidieker for more balanced UVM/UBC
>  behaviour. They probably will not apply without problems to -current but who
>  knows.
this means in current is the same and no limits can be set?!

bad. very bad