Can't go above 4 index workers

[GoobyBooby]

I have Photoprism installed via an app store (TrueNAS). Configured it to use max 6 threads (CPU:i5 10400F 6 cores 12 threads) and 8GB RAM . I've configured additional Environment variables for auto index & index schedule (both working) and an entry for PHOTOPRISM_WORKERS with the value 6.
When checking from terminal using photoprism config it shows that it is using only 4 index workers. Originally was 3, increased to 4 when I applied the entry but won't go to 6.

I can't edit the default config file & I tried adding an options.yml but I couldn't understand how to do it. Eitherway, this is strange behaviour, it should've worked with Environment variables too.

Any help is appreciated.

[lastzero]

TrueNAS Scale? Maybe Docker may only use 4 cores? There's definitely a limit, also when there's not enough free memory. For details see the internal/config package in our repository.

[GoobyBooby]

TrueNAS made the app through portrainer. Checked there the photoprism container had 6 threads and 8GB RAM allocated. The whole (and only) environment has all of the hardware resources allocated/availabe.