prof_gdump recommended but not included

[Eh2406]

https://docs.rs/tikv-jemalloc-ctl/latest/tikv_jemalloc_ctl/profiling/struct.prof.html Recommends using "the opt.prof_gdump option for information on high-water-triggered profile dumping". However I can't find any reference to prof_gdump in the code base. I feel like the documentation or the code is missing something.

[ti-chi-bot]

Welcome @Eh2406! It looks like this is your first issue to tikv/jemallocator 🎉

[BusyJay]

The docs are copied from jemalloc. It actually references https://jemalloc.net/jemalloc.3.html#opt.prof_gdump