Original Message-
From: Takashi Menjo
Sent: Tuesday, October 6, 2020 4:49 PM
To: Deng, Gang
Cc: pgsql-hack...@postgresql.org; 'Takashi Menjo'
Subject: RE: [PoC] Non-volatile WAL buffer
Hi Gang,
I have tried to but yet cannot reproduce performance degrade you reported when
inserting 32
Hi Takashi,
Thank you for the patch and work on accelerating PG performance with NVM. I
applied the patch and made some performance test based on the patch v4. I
stored database data files on NVMe SSD and stored WAL file on Intel PMem (NVM).
I used two methods to store WAL file(s):
1.
to load it
again, which will waste much cpu time. Article
https://software.intel.com/en-us/articles/avoiding-and-identifying-false-sharing-among-threads
explain more detail.
-Original Message-
From: Tom Lane
Sent: Thursday, January 9, 2020 10:43 PM
To: Thomas Munro
Cc: Deng, Gang
Thank you for the comment. Yes, I agree the alternative of using '(!parallel)',
so that no need to test the bit. Will someone submit patch to for it
accordingly?
-Original Message-
From: Thomas Munro
Sent: Thursday, January 9, 2020 6:04 PM
To: Deng, Gang
Cc: pgsql-hack
