Re: pgv18: simple table scan take more time than pgv14

2025-06-21 Thread Devrim Gündüz
Hi, On Fri, 2025-06-20 at 09:46 +0800, James Pang wrote: > same OS RHEL8, install pgv14.11 and pgv18.beta1_3, both installation > by RPM from pgdg, and use similar postgresql.conf. > 18.beta1 > postgres=# \timing on > Timing is on. > postgres=# select * from tt where b ~~ 'a%'; >  a | b > ---+-

Re: pgv18: simple table scan take more time than pgv14

2025-06-20 Thread Andres Freund
Hi, On 2025-06-20 09:46:06 +0800, James Pang wrote: > same OS RHEL8, install pgv14.11 and pgv18.beta1_3, both installation by RPM > from pgdg, and use similar postgresql.conf. > > 14.11 > Time: 55.082 ms > postgres=# select * from tt where b ~~ 'a%'; > a | b > ---+--- > (0 rows) > > Time: 54.

Re: pgv18: simple table scan take more time than pgv14

2025-06-19 Thread David G. Johnston
On Thursday, June 19, 2025, James Pang wrote: > same OS RHEL8, install pgv14.11 and pgv18.beta1_3, both installation by > RPM from pgdg, and use similar postgresql.conf. > You will need to show encoding and locale information for the databases under test. > > postgres$#for counter in 1..10

pgv18: simple table scan take more time than pgv14

2025-06-19 Thread James Pang
same OS RHEL8, install pgv14.11 and pgv18.beta1_3, both installation by RPM from pgdg, and use similar postgresql.conf. 14.11 postgres=# create table tt(a int primary key, b text); CREATE TABLE postgres=# do postgres-# $$ postgres$# begin postgres$#for counter in 1..100 loop postgres$# ins