Re: PostgreSQL 12: Feature Highlights
От | Bruce Momjian |
---|---|
Тема | Re: PostgreSQL 12: Feature Highlights |
Дата | |
Msg-id | 20190514131945.6dof67bfzmcftevd@momjian.us обсуждение исходный текст |
Ответ на | Re: PostgreSQL 12: Feature Highlights (Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>) |
Ответы |
Re: PostgreSQL 12: Feature Highlights
Re: PostgreSQL 12: Feature Highlights |
Список | pgsql-advocacy |
On Tue, May 14, 2019 at 06:25:43PM +0900, Amit Langote wrote: > Considering the quoted discussion here, maybe it's a good idea to note > that only the operations that need to touch a small number of partitions > are now processed efficiently, which covers both SELECT/UPDATE/DELETE that > benefit from improved pruning efficiency and INSERT that benefit from > improved tuple routing efficiency. So, maybe: > > Tables with thousands of child partitions can now be processed > efficiently by operations that only need to touch a small number > of partitions. > > That is, as I mentioned above, as opposed to queries that need to process > all partitions (such as, select count(*) from partitioned_table), which > don't perform any faster in v12 than in v11. The percentage of users who > run such workloads on PostgreSQL may be much smaller today, but perhaps > it's not a good idea to mislead them into thinking that *everything* with > partitioned tables is now faster even with thousands of partitions. Agreed, I changed it to your wording. -- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription +
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