Workers cause a massive spike in CPU ressource usage

[nono-lqdn]

Describe the bug When you enable Workers, via the one-of-each option, you will see a massive increase in CPU resource usage.

To Reproduce My vars.yml file looks like this:

matrix_synapse_workers_enabled: true

matrix_synapse_workers_preset: one-of-each

Expected behavior Same resource usage, maybe even less, or at least a snappier experience ?

Matrix Server:

• OS: debian
• Architecture amd64

Additional context Either I didn't understand what the workers are for, or I didn't understand how to configure it.

See the grafana graph of the difference, on the left with Workers activated, and on the right when the workers are deactivated.