We have 3 instances in a single server with different ports (8069, 8040, 8060) and different Odoo version (10, 11, 12). Server specifications are 4 CPU and 8Go RAM.

We have an issue with Odoo 12 only, he crash sometimes. In the log, we have these lines : "virtual real time limit (181/120s) reached."

We tried many manipulations found on the web, like change memory limit, change number of workers... Nothing change. Moreover, when we activate workers, we have another issue : "raise Exception("Exception: bus.Bus unavailable")"

We delete configuration line about longpolling port too, nothing change.

Our Odoo configuration :

Our Nginx configuration :

How to configure the serveur for multi-instance ? When Odoo documentation give us a calculation method for memory, does it work for multi-instance too ?

Thank you