I installed slapd in Docker, and it was using 712 MB memory even with a few entries. The fix is to run slapd after ulimit

Just read a blog series (App in a box) from Peter Hack at https://www.dynatrace.com/news/blog/app-in-a-box/, https://www.dynatrace.com/news/blog/app-in-a-box-customer-perspective/ and https://www.dynatrace.com/news/blog/app-in-a-box-part-3-logs/. Infrastructure monitoring (HW, OS, processes, network) is important,