Authoritative server leaks 260 KB every 1-2 hours
I run stress test against BIND 9.16.3 authoritative server on Alpine Linux 3.12 (uses MUSL libc) for 18 hours and I noticed that in many cases named's VSZ usage bumps 260 bytes every 1-2 hours. I haven't spotted this on Linux distributions with glibc. There are a few discrepancies from the "260 byte rule", but it seems too regular to be a coincidence. Although the mem usage bump is really tiny, there might be a leak of structure.
Here are VSZ/RSS data every 30 seconds: alpine-vm.txt
Here's a sample of few last lines funneled via uniq:
...
422496
422756
423016
423276
423536
423796
424056
424316
424576
424836
425096
425356
425616
425876