Re: [PATCH] Use MAP_HUGETLB where supported (v3) - Mailing list pgsql-hackers

Alvaro Herrera escribió:
> Sergey Konoplev escribió:

> > I wasn't talking about a built-in support. It was about an ability (a
> > way) to back sh_buf with hugepages.
> 
> Then what you need is to set 
> dynamic_shared_memory_type = sysv
> in postgresql.conf.

The above is mistaken -- there's no way to disable the mmap() segment in
9.3, other than recompiling with EXEC_BACKEND which is probably
undesirable for other reasons.

I don't think I had ever heard of that recipe to use huge pages in
previous versions; since the win is probably significant in some
systems, we could have made this configurable.

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services