On 5 September 2013 22:24, Bruce Momjian <bruce@momjian.us> wrote:
> On Mon, Aug 19, 2013 at 09:27:57PM -0400, Stephen Frost wrote:
>> * Andres Freund (andres@2ndquadrant.com) wrote:
>> > I vote for adapting the patch to additionally zero out the file via
>> > write(). In your tests that seemed to perform at least as good as the
>> > old method... It also has the advantage that we can use it a littlebit
>> > more as a testbed for possibly using it for heap extensions one day.
>> > We're pretty early in the cycle, so I am not worried about this too much...
>>
>> I dunno, I'm pretty disappointed that this doesn't actually improve
>> things. Just following this casually, it looks like it might be some
>> kind of locking issue in the kernel that's causing it to be slower; or
>> at least some code path that isn't exercise terribly much and therefore
>> hasn't been given the love that it should.
>>
>> Definitely interested in what Ts'o says, but if we can't figure out why
>> it's slower *without* writing out the zeros, I'd say we punt on this
>> until Linux and the other OS folks improve the situation.
>
> FYI, the patch has been reverted.
Is there an updated patch available for this? And did anyone hear from Ts'o?
--
Thom