High memory usage

[feliwir]

Hello,

we are using DICOM-RST inside a Kubernetes cluster and observed that memory usage is steadily growing over time:

We observed similar behaviour with other multithreaded, tokio based web-services we deployed. According to our research this is related to the glibc memory allocator, which doesn't behave very well in multithreaded, long-running scenarios.

We solved this by switching to mimalloc, maybe we can investigate what would be a good solution?

[holg]

i did do some analysis, and would say @feliwir did do the right conclusions, specifically for kubernetes this is a known issue.
So yes mimalloc shall be a good solution (gut feeling)