On Sat, 2019-11-30 at 22:47 +0300, Eugene Podshivalov wrote: > It sounds strange but the "type" is indeed impacting the overall > performance somehow. > I've just tried to execute the following sequence of commands on a > fresh new database with PostreSQL v10 and both the copy and primary > key commands performed as slow as in v11 and 12. > > SET synchronous_commit TO OFF; > SET client_encoding TO 'UTF8'; > COPY ways FROM program 'cmd /c "type D:\ways.txt"'; > ALTER TABLE ONLY ways ADD CONSTRAINT pk_ways PRIMARY KEY (id); > > Regards > > пт, 29 нояб. 2019 г. в 15:22, Eugene Podshivalov <yaugenka@xxxxxxxxx>: > > Laurenz, > > There is no way to run copy without the "type" on v11. See this thread > > https://www.postgresql.org/message-id/CAKHmqNCfTMM6%3DPqc6RUMEQ_2BPfo5KGGG-0fzRXZCVooo%3DwdNA%40mail.gmail.com > > > > My machine is running on NVMe disks, so the I/O subsystem very strong. > > The 100% overload is not constant but periodical, as if there are some > > kind of dumps for recovery performed in the background. Is it an option to split the file into parts of less than 2GB in size? Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com
