On 9/19/21 12:32 PM, Justin Pryzby wrote: > On Sat, Sep 18, 2021 at 01:37:19PM -0400, Tom Lane wrote: >> We don't yet have a list-of-major-features for the v14 release notes. >> Anybody care to propose one? > > . Allow extended statistics on column expressions; > . Memoize node which can improve speed of nested loop joins; > . Allow use of LZ4 compression for faster access to TOASTed fields; > . JSONB and H-store types may be subscripted, as may be participating data types provided by extensions. > . Many improvements to performance of VACUUM; > > Maybe these??
I would propose a few different ones. I'm looking at the overall breadth of user impact as I propose these and the reactions I've seen in the field.
- General performance improvements for databases with multiple connections (the MVCC snapshot work).
- The reduction in bloat on frequently updated B-trees; that was a longstanding complaint against PostgreSQL that was resolved.
- I agree with the JSON improvements; I'd bucket this in data types and include the support of multiranges.
- Logical decoding / replication received some significant performance improvements
- Many improvements in query parallelism. One that stands out is how parallel queries can be leveraged using FDWs now, in particular the postgres_fdw.
- I agree with VACUUM suggestion as well.
I can try proposing some wording on this in a bit; I'm working on the overdue draft of the press release, and thought I'd chime in here first.
