How to properly use of step in lr_config?

[sarmientoj24]

Been seeing step in lr_config where the step, for example, is [8, 11] and the epochs are 12.

How do you properly configure that step? Say, the epoch I put is 75. What should be the step?

[jbwang1997]

It doesn't have a rule to set the step. The step used in mmdetection is as same as it in detectron2.

In your situation, you can simply linearly expand the [8, 11, 12] step schedule to totally 75 epochs.

[sarmientoj24]

So the step_config for 75 epochs is still [8, 11]? I thought the epoch has influence on the step?

[jbwang1997]

You can use [50, 69] which is equal to [8, 11] x (75/12).

[ZwwWayne]

The steps are usually empirically tuned for different epochs to reduce the overfitting and achieve better performance. We suggest you follow the existing configs of supported datasets and models in MMDetection.