After reading about the speed improvements and other features in Odoo 12 I took the adventure and risk of migrating my database and custom modules from 10.0 CE to 12.0 CE. It was a painful and time consuming work but the disappointment at the end was worse than the excitement at first.

 Not only not faster but I would say even slower than V10. I am talking about responsiveness - the overall  feeling of working and performing usual tasks.

There are big delays in the responses of the server and it makes you feel you are walking while trying to drag a big lame monster behind you. So my second conquest started - Let's speed up Odoo

Reading and reading online articles on that topic...

I am running odoo in a container and have given these resources:

• 4 CPU x 2 CORE = 8
  

• 8GB Memory

• SDD Drive

• Postgresql 9.6

• behind Nginx proxy
  

After many tryouts have ended up with these configs (actually changes in the config had hardly any impact):

Odoo config:

proxy_mode = True
limit_memory_soft = 1629145600
limit_memory_hard = 4677721600
limit_request = 8192
limit_time_cpu = 600
limit_time_real = 1200
limit_time_real_cron = -1
max_cron_threads = 1
workers = 8

Postgresql Config:

max_connections = 200
shared_buffers = 1600MB
effective_cache_size = 4GB
maintenance_work_mem = 600MB
checkpoint_completion_target = 0.7
wal_buffers = 16MB
default_statistics_target = 100
random_page_cost = 1.1
effective_io_concurrency = 200
work_mem = 64MB
min_wal_size = 1GB
max_wal_size = 2GB
max_worker_processes = 4
max_parallel_workers_per_gather = 2

What I tried:

• Different values for the config parameters for odoo and postgresql

• uninstalling unused apps

• using pgBouncer to speed up requests to the database

• applying changes from https://github.com/odoo/odoo/pull/30274 to speed up Shop (there was little improvement)

• many more things that came to my mind...

I am running Odoo locally with max 5 users.

Now The website takes 4 seconds to load a page with products (no multiple variants). I found this about it: https://github.com/odoo/odoo/pull/30274

The backend:

displaying sale orders in list view (80 SO per page) takes about 4 secs as well. Further investigation shows  search_read takes 2600ms for that

Adding products to SO line is also not very responsive: the most consuming is sale.order.line/onchange taking 265ms followed by sale.order/onchange taking 156ms overall takes more than a second after you select your product until it is added to the SO line.

I have spent so many hours already on that. Is Odoo supposed to do better than that ? What is your experience?