TiCDC handles DDLs one by one, which could be a bottleneck

[hicqu]

What did you do?

Deploy a TiCDC cluster, and run lots of TRUNCATE statements in the upstream TiDB.

What did you expect to see?

No response

What did you see instead?

TiCDC handles DDLs one by one. It slows down the replication.

Versions of the cluster

Upstream TiDB cluster version (execute SELECT tidb_version(); in a MySQL client):

(paste TiDB cluster version here)

Upstream TiKV version (execute tikv-server --version):

(paste TiKV version here)

TiCDC version (execute cdc version):

(paste TiCDC version here)