> Robert Haas <robertmh...@gmail.com> writes: >> On Fri, Jun 29, 2012 at 3:52 PM, Andres Freund <and...@2ndquadrant.com> >> wrote: >>> In a *very* quick patch I tested using huge pages/MAP_HUGETLB for the >>> mmap'ed >>> memory. > >> So, considering that there is required setup, it seems that the >> obvious thing to do here is add a GUC: huge_tlb_pages (boolean). > >> The other alternative is to try with MAP_HUGETLB and, if it fails, try >> again without MAP_HUGETLB. > > +1 for not making people configure this manually. > > Also, I was under the impression that recent Linux kernels use hugepages > automatically if they can, so I wonder exactly what Andres was testing > on ...
if you mean the "trasparent hugepage" feature, iirc it doesn't affect MAP_SHARED mappings like this. YAMAMOTO Takashi > > regards, tom lane > > -- > Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
