Re: Query performance in 9.6.24 vs 14.10

2024-01-29 Thread Bob Jolliffe
Thanks for the update. On Mon, Jan 29, 2024, 16:53 Ron Johnson wrote: > According to my tests, sometimes JIT is a little faster, and sometimes > it's a little slower. Mostly within the realm of statistical noise > (especially with each query having a sample size of only 13, on a VM that > lives

Re: Query performance in 9.6.24 vs 14.10

2024-01-29 Thread Ron Johnson
According to my tests, sometimes JIT is a little faster, and sometimes it's a little slower. Mostly within the realm of statistical noise (especially with each query having a sample size of only 13, on a VM that lives on a probably-busy host). On Mon, Jan 29, 2024 at 9:18 AM Ron Johnson wrote: >

Re: Query performance in 9.6.24 vs 14.10

2024-01-29 Thread Ron Johnson
Yes, jit=on. I'll test them with jit=off, to see the difference. (The application is 3rd party, so will change it at the system level.) On Mon, Jan 29, 2024 at 7:09 AM Bob Jolliffe wrote: > Out of curiosity, is the pg14 running with the default jit=on setting? > > This is obviously entirely du

Re: Query performance in 9.6.24 vs 14.10

2024-01-29 Thread Bob Jolliffe
Out of curiosity, is the pg14 running with the default jit=on setting? This is obviously entirely due to the nature of the particular queries themselves, but we found that for our workloads that pg versions greater than 11 were exacting a huge cost due to the jit compiler. Once we explicitly turn

Re: Query performance in 9.6.24 vs 14.10

2024-01-28 Thread Ron Johnson
On Sun, Jan 28, 2024 at 10:44 PM David Rowley wrote: > On Mon, 29 Jan 2024 at 07:37, Ron Johnson wrote: > >> 08 9.6.24 1,142.164 1,160.801 1,103.716 1,249.852 1,191.081 >> 14.10 159.354 155.111 155.111 162.797 158.157 86.72% >> > > Your speedup per cent calculation undersells PG14 by quite a bit

Re: Query performance in 9.6.24 vs 14.10

2024-01-28 Thread David Rowley
On Mon, 29 Jan 2024 at 07:37, Ron Johnson wrote: > 08 9.6.24 1,142.164 1,160.801 1,103.716 1,249.852 1,191.081 > 14.10 159.354 155.111 155.111 162.797 158.157 86.72% > Your speedup per cent calculation undersells PG14 by quite a bit. I'd call that an increase of ~639% rather than 86.72%. I thi