On 06.09.2020 21:52, Andres Freund wrote:
Hi,
On 2020-09-05 16:58:31 +0300, Konstantin Knizhnik wrote:
On 04.09.2020 21:53, Andres Freund wrote:
I also used huge_pages=on / configured them on the OS level. Otherwise
TLB misses will be a significant factor.
As far as I understand there should not be no any TLB misses because size of
the shared buffers (8Mb) as several order of magnitude smaler that available
physical memory.
I assume you didn't mean 8MB but 8GB? If so, that's way large enough to
be bigger than the TLB, particularly across processes (IIRC there's no
optimization to keep shared mappings de-duplicated between processes
from the view of the TLB).
Sorry, certainly 8Gb.
I tried huge pages, but it has almost no effect/
