# Frequently Asked Questions about Handling Writes Stall

+ Since two RocksDB are used in TiKV as the storage of raft log and KV data, when the number of memtalbe or level 0 is too large, RocksDB will slow down writes to achieve the purpose of self-protection. This action is called write stall.


![left](./student-guide/diagram/08-Write-Stall-01-01.png)
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Frequently Asked Questions - Write Stall

1. Write Stall phenomenon

Since two RocksDB are used in TiKV as the storage of raft log and KV data, when the number of memtalbe or level 0 is too large, RocksDB will slow down writes to achieve the purpose of self-protection. This action is called write stall.

We can monitor the occurrence and cause of Write Stall via TikV-Details -> RocksDB KV/RocksDB raft -> Write Stall Reason or RocksDB logs (look for the Stalling keyword).