tuwunel locks up / RocksDB Write Stalling

[gymnae]

I'm running tuwunel inside an unprivileged LXC on a Proxmox host. Tuwunel runs as binary on a fedora guest. Since I added some users, I often appear to be suffering write stalling. The write ahead log grows, sometimes it jumps from 1 to 20 or 40 or even 60. If this happens, the app does not crash, but I notice no messages go in or out. I then have to restart tuwunel.

tuwunel has exclusive access to two cores of an i5-12400, 8GB RAM and runs on an NVME. I have only three active users. So that hardware should be fine?

Are the database or other settings, which can ensure reliable functionality in shared environments, where no process of tuwunel has exclusive access to I/O or CPU cycles?