On Fri, 19 Jun 1998, J. J. Merelo wrote:
> Paul J. Lucas wrote:
> > P.S. FYI: SWISH++, by virtue of mmap(2), effectively does load
> > the entire index into memory increasing the speed of results,
> I know, I use it and it's pretty fast, but still with big indices, or
> with small indices but lots of request, and being CGIs as they are, you
> could end up, as it's happened to us, with 10 or 12 copies of the index
> in memory.
Are you sure about that? The mapping parameter specified in
the mmap(2) call in file_vector.c is MAP_SHARED that, to my
understanding, means that multiple processes will share a
mapping of the same file; hence there is at most one copy in
memory at any given instant.
Received on Fri Jun 19 21:22:55 1998