Mismatch in count of OTel attributes to index and default label limit

[lindeskar]

Describe the bug The count of OTel attributes to index (17) and the default label limit (15) do not match:

https://github.com/grafana/loki/blob/19fef9355fdd46911611dbec25df0f5a4e397d31/docs/sources/shared/configuration.md?plain=1#L2008-L2011

https://github.com/grafana/loki/blob/19fef9355fdd46911611dbec25df0f5a4e397d31/docs/sources/shared/configuration.md?plain=1#L2896-L2898

The 17 OTel resource attributes are also listed in the docs, which mentions the old default limit (max_label_names_per_series: 30):

https://github.com/grafana/loki/blob/19fef9355fdd46911611dbec25df0f5a4e397d31/docs/sources/send-data/otel/_index.md?plain=1#L75-L92

To Reproduce Steps to reproduce the behavior:

1. Read the docs

Expected behavior The count of attributes and labels match.

Environment:

• https://grafana.com/docs/loki/v3.0.x/configure/
• https://grafana.com/docs/loki/v3.0.x/send-data/otel/#format-considerations

Screenshots, Promtail config, or terminal output

Comment I would have created a PR to fix the docs, but I suspect this might lead to a default config change?

[lindeskar]

Maybe the idea was that all attributes will never be used at once? (Deployment / StatefulSet / DaemonSet / ...)

If so, this issue is just reporting the old default limit (30) in:

https://github.com/grafana/loki/blob/19fef9355fdd46911611dbec25df0f5a4e397d31/docs/sources/send-data/otel/_index.md?plain=1#L75

[sandeepsukhani]

Maybe the idea was that all attributes will never be used at once? (Deployment / StatefulSet / DaemonSet / ...)

Yeah, not all attributes will be set at once. Some of them are mutually exclusive.

If so, this issue is just reporting the old default limit (30) in:

Yeah, it was a mistake. I think I referenced the old limit, which was 30 earlier. Thanks for pointing it out! I will fix it.