A lot of memory is used, is this normal?

The above is a screenshot of the content monitoring of the gitea service running for 2 days. It can be seen that the memory is always increasing and there is no sign of release.

I deployed it using the gitea:nightly version of the image.

Can someone help me figure out what is causing the memory usage to keep growing? Thanks

The above is the statistics seen from the gitea management backend.