add metrics about DB size and IO
Open
type/development
- Dominant language
- Go
- Stars
- 1.2k
- Forks
- 783
- Avg merge
- 5d 21h
- Merged PRs (30d)
- 36
Description
## Development Task
We want to know the PD actually disk usage, IO usage. Including, etcd db size and leveldb db size. With this data, we can better recommend models of cluster size and PD instances.
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