Re: Move PinBuffer and UnpinBuffer to atomics

On Sun, Apr 10, 2016 at 1:13 AM, Andres Freund <andres@anarazel.de> wrote:

On 2016-04-09 22:38:31 +0300, Alexander Korotkov wrote:
> There are results with 5364b357 reverted.

What exactly is this test?

I think assuming it is a read-only -M prepared pgbench run where data fits in shared buffers.  However if you can share exact details, then I can try the similar test.

 

Crazy that this has such a negative impact. Amit, can you reproduce
that?

I will try it.

 

Alexander, I guess for r/w workload 5364b357 is a benefit on that
machine as well?

I also think so. Alexander, if try read-write workload with unlogged tables, then we should see an improvement.