# Monitoring Analysis (D)

+ Grafana monitoring`TiKV Details --> RocksDB - Raft`
  + The write duration (write duration) of the Rocksdb Raft log has increased significantly from 9:25


![left](./student-guide/diagram/03-23-1.png)

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Grafana monitors TiKV Details —> RocksDB - Raft: Rocksdb Raft log write duration (Write duration) has increased significantly since 9:25, mainly due to fsync/fdatasync swipe delay (WAL sync duration), up to 700ms+