cjw

### What type of bug is this? Crash ### What subsystems are affected? Standalone mode ### Minimal reproduce step Run db with the `pprof` feature: ``` cargo run --features=pprof --...

## Motivation `tracing-flame` generates a "virtual span" named `ThreadId(xxx)-{thread_name}` to identify the location of a thread within a span. When the time outside a span is large, the span of...