Show HN: PostgreSQL performance and cost across 23 EC2 instance types
Comments
nijave
anivan_
Good points, thanks. On huge pages: this is also about RDS vs self-managed EC2 Postgres. RDS effectively has "on" by default, but default self-managed (that I benchmarked) is "try" which is effectively "off". I'll update the methodology page to cover that, and, yeah, it makes sense to cover that separately.
io2 is on my future-work list. And agree, I have the same feelings about IOPS.
Rafuino
Most of the recent AMD instances on AWS have SMT off so 1 core per vCPU. None of those seem to be tested here though
mattlong
I'd be very curious to see you add the Optimized Reads instance types, e.g. r8gd or m8gd, to your benchmark. They add a local NVMe-based SSD block storage that serves as a cache in front of the network-based disks among other use cases. They have been a huge win for us for a read-heavy workload where the dataset is significantly larger than memory.
Edit: Apologies, on a closer read, I realize you were not testing RDS but managing Postgres on EC2 directly.
anivan_
Yes, I want to cover RDS with all of its specifics as the next step.
Thanks for highlighting this!
Rafuino
Gotta get the AMD instances in there. Not seeing M8a, R8a, C8a, for example
anivan_
Yeah, good point - I've limited the scope to make the first release more lightweight. I'll add them in the next one, thanks!
ballislife30
Would love to see a comparison between Aurora PostgreSQL and self-host PostgreSQL on the same EC2 instance type.
anivan_
Good point! I kept the configuration of the Postgres pretty close to the defaults, and it would be interesting to compare it with the same default Aurora Postgres.
And it should be easy to add - I'll check it, thanks!
toredash
I would really see this compared to what AWS is offering via RDS
anivan_
Yes! This was my initial dilemma - whether to test RDS or self-hosted Postgres on EC2. I decided to start with EC2 to be a bit more "pure", and remove cost overhead of RDS.
But support for RDS is my next candidate for development. Plus, comparison would also be interesting.
crudgen
Interesting, is there something like this for azure
anivan_
I was initially inspired by the https://instances.vantage.sh/, so, like them, I want to add other providers later. Like Azure and GCP.
It would also be interesting to have cross-provider comparison. I think it's doable. Thanks!
Would be interesting to see huge pages and io2 impact.
I did a smaller version on Azure and disk latency had a massive impact much more so than max IOPs (although their crappy storage offering needed like 64-128 iodepth to get advertised iops).
Results seem mostly in line with expectations. Iirc vcpu is threads so on arm64 you get 4 smt1 cores vs Intel/AMD you get 2 smt2 cores.