On Tue, 2014-01-14 at 15:09 -0500, Robert Haas wrote:
> On Tue, Jan 14, 2014 at 3:00 PM, James Bottomley
> wrote:
> >> Doesn't sound exactly like what I had in mind. What I was suggesting
> >> is an analogue of read() that, if it reads full pages of data to a
>
On Tue, 2014-01-14 at 12:39 -0500, Robert Haas wrote:
> On Tue, Jan 14, 2014 at 12:20 PM, James Bottomley
> wrote:
> > On Tue, 2014-01-14 at 15:15 -0200, Claudio Freire wrote:
> >> On Tue, Jan 14, 2014 at 2:12 PM, Robert Haas wrote:
> >> > In terms of avoiding do
On Tue, 2014-01-14 at 10:39 -0500, Tom Lane wrote:
> James Bottomley writes:
> > The current mechanism for coherency between a userspace cache and the
> > in-kernel page cache is mmap ... that's the only way you get the same
> > page in both currently.
>
> Rig
On Tue, 2014-01-14 at 15:15 -0200, Claudio Freire wrote:
> On Tue, Jan 14, 2014 at 2:12 PM, Robert Haas wrote:
> >
> > In terms of avoiding double-buffering, here's my thought after reading
> > what's been written so far. Suppose we read a page into our buffer
> > pool. Until the page is clean,
On Tue, 2014-01-14 at 11:48 -0500, Robert Haas wrote:
> On Tue, Jan 14, 2014 at 11:44 AM, James Bottomley
> wrote:
> > No, I'm sorry, that's never going to be possible. No user space
> > application has all the facts. If we give you an interface to force
> > un
On Tue, 2014-01-14 at 15:39 +0100, Hannu Krosing wrote:
> On 01/14/2014 09:39 AM, Claudio Freire wrote:
> > On Tue, Jan 14, 2014 at 5:08 AM, Hannu Krosing
> > wrote:
> >> Again, as said above the linux file system is doing fine. What we
> >> want is a few ways to interact with it to let it do eve
On Mon, 2014-01-13 at 19:48 -0500, Trond Myklebust wrote:
> On Jan 13, 2014, at 19:03, Hannu Krosing wrote:
>
> > On 01/13/2014 09:53 PM, Trond Myklebust wrote:
> >> On Jan 13, 2014, at 15:40, Andres Freund wrote:
> >>
> >>> On 2014-01-13 15:15:16 -0500, Robert Haas wrote:
> On Mon, Jan 13
On Mon, 2014-01-13 at 21:29 +, Greg Stark wrote:
> On Mon, Jan 13, 2014 at 9:12 PM, Andres Freund wrote:
> > For one, postgres doesn't use mmap for files (and can't without major
> > new interfaces). Frequently mmap()/madvise()/munmap()ing 8kb chunks has
> > horrible consequences for performan
On Mon, 2014-01-13 at 22:12 +0100, Andres Freund wrote:
> On 2014-01-13 12:34:35 -0800, James Bottomley wrote:
> > On Mon, 2014-01-13 at 14:32 -0600, Jim Nasby wrote:
> > > Well, if we were to collaborate with the kernel community on this then
> > > presumably we
On Mon, 2014-01-13 at 14:32 -0600, Jim Nasby wrote:
> On 1/13/14, 2:27 PM, Claudio Freire wrote:
> > On Mon, Jan 13, 2014 at 5:23 PM, Jim Nasby wrote:
> >> On 1/13/14, 2:19 PM, Claudio Freire wrote:
> >>>
> >>> On Mon, Jan 13, 2014 at 5:15 PM, Robert Haas
> >>> wrote:
>
> On a related n
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