Re: Very slow Query compared to Oracle / SQL - Server

2021-05-10 Thread Semen Yefimenko
kes 570 MS ---IndexSize: average 300 MB Am Sa., 8. Mai 2021 um 14:06 Uhr schrieb Semen Yefimenko < [email protected]>: > Unless I'm overlooking something obvious one result has 500 000 rows the >> other 7 000. > > You are right, it wasn't. I have

Re: Very slow Query compared to Oracle / SQL - Server

2021-05-08 Thread Semen Yefimenko
> > Unless I'm overlooking something obvious one result has 500 000 rows the > other 7 000. You are right, it wasn't. I have 2 datasets, one containing 12 mil entries and the other 14 mil entries. I accidentally used the one with 12 mil entries in that table which actually only contains 7000~ entr

Re: Very slow Query compared to Oracle / SQL - Server

2021-05-07 Thread Semen Yefimenko
chrieb Vijaykumar Jain < [email protected]>: > Is this on windows ? > > I see a thread that mentions of performance penalty due to parallel worker > > > There is a mailing thread with subject line - > Huge performance penalty with parallel queries in Wind

Re: Very slow Query compared to Oracle / SQL - Server

2021-05-07 Thread Semen Yefimenko
e are no tx using the dead tuples) > > and then run your query. > > Thanks, > Vijay > > > > > > > On Fri, 7 May 2021 at 13:34, Semen Yefimenko > wrote: > >> Sorry if I'm cumulatively answering everyone in one E-Mail, I'm not sure >> how

Re: Very slow Query compared to Oracle / SQL - Server

2021-05-07 Thread Semen Yefimenko
> unsatisfiable > https://www.postgresql.org/docs/12/release-12-6.html Release date: > 2021-02-11 > > > > COLLATE pg_catalog."default" > > You can test the "C" Collation in some columns (keys ? ) ; in theory, > it should be faster : > "Th

Re: Very slow Query compared to Oracle / SQL - Server

2021-05-06 Thread Semen Yefimenko
M Boltenkov < [email protected]>: > On 05/06/21 21:15, Alexey M Boltenkov wrote: > > On 05/06/21 19:11, [email protected] wrote: > > - Mensagem original - > > De: "Semen Yefimenko" > Para: "pgsql-performance" > > Enviadas:

Very slow Query compared to Oracle / SQL - Server

2021-05-06 Thread Semen Yefimenko
Hi there, I've recently been involved in migrating our old system to SQL Server and then PostgreSQL. Everything has been working fine so far but now after executing our tests on Postgres, we saw a very slow running query on a large table in our database. I have tried asking on other platforms but