On 2014-12-23 16:42:41 -0500, Robert Haas wrote:
I don't think I have anything to say about the substance of the patch.
If fetch-and-add is faster than a spinlock cycle, then it is. And
it's good to be fast.
I don't think the primary advantage is that it's fast (even though it
should be as
On Mon, Dec 8, 2014 at 2:51 PM, Andres Freund and...@2ndquadrant.com wrote:
On 2014-10-30 07:55:08 -0400, Robert Haas wrote:
On Wed, Oct 29, 2014 at 3:09 PM, Andres Freund and...@2ndquadrant.com
wrote:
But if it is, then how about
adding a flag that is 4 bytes wide or less alongside
On 2014-10-30 07:55:08 -0400, Robert Haas wrote:
On Wed, Oct 29, 2014 at 3:09 PM, Andres Freund and...@2ndquadrant.com wrote:
But if it is, then how about
adding a flag that is 4 bytes wide or less alongside bgwriterLatch,
and just checking the flag instead of checking bgwriterLatch itself?
On Thu, Oct 30, 2014 at 5:01 PM, Andres Freund and...@2ndquadrant.com
wrote:
On 2014-10-30 10:23:56 +0530, Amit Kapila wrote:
I have a feeling that this might also have some regression at higher
loads (like scale_factor = 5000, shared_buffers = 8GB,
client_count = 128, 256) for the similar
On 2014-10-30 10:23:56 +0530, Amit Kapila wrote:
I have a feeling that this might also have some regression at higher
loads (like scale_factor = 5000, shared_buffers = 8GB,
client_count = 128, 256) for the similar reasons as bgreclaimer patch,
means although both reduces contention around spin
On Wed, Oct 29, 2014 at 3:09 PM, Andres Freund and...@2ndquadrant.com wrote:
But if it is, then how about
adding a flag that is 4 bytes wide or less alongside bgwriterLatch,
and just checking the flag instead of checking bgwriterLatch itself?
Yea, that'd be nicer. I didn't do it because it
On Mon, Oct 27, 2014 at 9:32 AM, Andres Freund and...@2ndquadrant.com wrote:
I've previously posted a patch at
http://archives.postgresql.org/message-id/20141010160020.GG6670%40alap3.anarazel.de
that reduces contention in StrategyGetBuffer() by making the clock sweep
lockless. Robert asked me
On 2014-10-29 14:18:33 -0400, Robert Haas wrote:
On Mon, Oct 27, 2014 at 9:32 AM, Andres Freund and...@2ndquadrant.com wrote:
I've previously posted a patch at
http://archives.postgresql.org/message-id/20141010160020.GG6670%40alap3.anarazel.de
that reduces contention in StrategyGetBuffer()
On Thu, Oct 30, 2014 at 12:39 AM, Andres Freund and...@2ndquadrant.com
wrote:
On 2014-10-29 14:18:33 -0400, Robert Haas wrote:
The interaction between this and the bgreclaimer idea is interesting.
We can't making popping the freelist lockless without somehow dealing
with the resulting
Hi,
I've previously posted a patch at
http://archives.postgresql.org/message-id/20141010160020.GG6670%40alap3.anarazel.de
that reduces contention in StrategyGetBuffer() by making the clock sweep
lockless. Robert asked me to post it to a new thread; I originally
wrote it to see some other
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