On Mon, Sep 16, 2013 at 9:13 AM, Heikki Linnakangas
wrote:
> Robert, do you remember why you put the "pagesize = sysconf(_SC_PAGE_SIZE);"
> call in the new mmap() shared memory allocator?
Hmm, no. Unfortunately, I don't. We could try ripping it out and see
if the buildfarm breaks. If it is need
On 2013-09-16 15:18:50 +0200, Andres Freund wrote:
> > So even a tiny allocation, much smaller than any page size, succeeds, and it
> > reserves a huge page. I tried the same with larger values; the kernel always
> > uses huge pages, and rounds up the allocation to a multiple of the huge page
> > s
On 2013-09-16 16:13:57 +0300, Heikki Linnakangas wrote:
> On 16.09.2013 13:15, Andres Freund wrote:
> >On 2013-09-16 11:15:28 +0300, Heikki Linnakangas wrote:
> >>On 14.09.2013 02:41, Richard Poole wrote:
> >>>The attached patch adds the MAP_HUGETLB flag to mmap() for shared memory
> >>>on systems
On 16.09.2013 13:15, Andres Freund wrote:
On 2013-09-16 11:15:28 +0300, Heikki Linnakangas wrote:
On 14.09.2013 02:41, Richard Poole wrote:
The attached patch adds the MAP_HUGETLB flag to mmap() for shared memory
on systems that support it. It's based on Christian Kruse's patch from
last year,
On 2013-09-16 11:15:28 +0300, Heikki Linnakangas wrote:
> On 14.09.2013 02:41, Richard Poole wrote:
> >The attached patch adds the MAP_HUGETLB flag to mmap() for shared memory
> >on systems that support it. It's based on Christian Kruse's patch from
> >last year, incorporating suggestions from Andr
On 14.09.2013 02:41, Richard Poole wrote:
The attached patch adds the MAP_HUGETLB flag to mmap() for shared memory
on systems that support it. It's based on Christian Kruse's patch from
last year, incorporating suggestions from Andres Freund.
I don't understand the logic in figuring out the pag
On Sat, 2013-09-14 at 00:41 +0100, Richard Poole wrote:
> The attached patch adds the MAP_HUGETLB flag to mmap() for shared
> memory on systems that support it.
Please fix the tabs in the SGML files.
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To make changes to you
The attached patch adds the MAP_HUGETLB flag to mmap() for shared memory
on systems that support it. It's based on Christian Kruse's patch from
last year, incorporating suggestions from Andres Freund.
On a system with 4GB shared_buffers, doing pgbench runs long enough for
each backend to touch mos
