Any potential improvements for raft election when instances fail

[hicqu]

Question

I have adding a metrics to show how many rounds are necessary to elect a new region leader when one TiKV instance fail. Here is the result:

The picture shows how many election rounds are used to get a new region leader. 376K regions use 1 round but 18K regions use 2 round.

Currently it's expected but maybe it's possible to improve it.

[BusyJay]

tikv/raft-rs#420 should improve this.

[Lily2025]

/type enhancement