On Mon, Jun 25, 2012 at 11:05 PM, Jeff Janes wrote:
> On Mon, Jun 18, 2012 at 5:42 PM, Robert Haas wrote:
>>
>> Hmm. That was actually a gloss I added on existing code to try to
>> convince myself that it was safe; I don't think that the changes I
>> made make that any more or less safe than it
On Mon, Jun 18, 2012 at 5:42 PM, Robert Haas wrote:
>
> Hmm. That was actually a gloss I added on existing code to try to
> convince myself that it was safe; I don't think that the changes I
> made make that any more or less safe than it was before.
Right, sorry. I thought there was some streng
On Fri, Jun 15, 2012 at 1:58 PM, Jeff Janes wrote:
> Do we need the retry flag (applies to two places)? If oldblkno is
> still InvalidBlockNumber then it can't equal blkno.
I was a bit concerned that blkno = BUCKET_TO_BLKNO(metap, bucket)
might set blkno to InvalidBlockNumber, thus possibly mess
On Wed, May 30, 2012 at 3:14 PM, Robert Haas wrote:
> I developed the attached patch to avoid taking a heavyweight lock on
> the metapage of a hash index. Instead, an exclusive buffer content
> lock is viewed as sufficient permission to modify the metapage, and a
> shared buffer content lock is u
On Thu, May 31, 2012 at 7:07 AM, Dickson S. Guedes wrote:
> 2012/5/30 Robert Haas :
>> I tested the effect of this by setting up a series of 5-minute
>> read-only pgbench run at scale factor 300 with 8GB of shared buffers
>> on the IBM POWER7 machine.
>
> I know it doesn't matter, but out of curio
2012/5/30 Robert Haas :
> I tested the effect of this by setting up a series of 5-minute
> read-only pgbench run at scale factor 300 with 8GB of shared buffers
> on the IBM POWER7 machine.
I know it doesn't matter, but out of curiosity what OS you used?
best regards,
--
Dickson S. Guedes
mail/xm
I developed the attached patch to avoid taking a heavyweight lock on
the metapage of a hash index. Instead, an exclusive buffer content
lock is viewed as sufficient permission to modify the metapage, and a
shared buffer content lock is used when such modifications need to be
prevented. For the mo
