On Wed, May 31, 2023 at 02:05:10PM +1200, David Rowley wrote: > On Wed, 31 May 2023 at 13:13, Bruce Momjian <bruce@xxxxxxxxxx> wrote: > > There is no mention of concurrency being a requirement. Is it wrong? I > > think there was a question of whether you had to add _multiple_ blocks > > ot get a benefit, not if concurrency was needed. This email about the > > release notes didn't mention the concurrent requirement: > > My understanding had been that concurrency was required, but I see the > commit message for 00d1e02be mentions: > > > Even single threaded > > COPY is measurably faster, primarily due to not dirtying pages while > > extending, if supported by the operating system (see commit 4d330a61bb1). > > If that's the case then maybe the beta release notes could be edited > slightly to reflect this. Maybe something like: > > "Relation extensions have been improved allowing faster bulk loading > of data using COPY. These improvements are more significant when > multiple processes are concurrently loading data into the same table." The release notes don't normally get into details on the magnitude of the improvement in various circumstances. > The current text of "PostgreSQL 16 can also improve the performance of > concurrent bulk loading of data using COPY up to 300%." does lead me > to believe that nothing has been done to improve things when only a > single backend is involved. Yes, agreed. -- Bruce Momjian <bruce@xxxxxxxxxx> https://momjian.us EDB https://enterprisedb.com Only you can decide what is important to you.
