Support higher load concurrency?

[breezewish]

Hi,

I am using TPC-H prepare:

go-tpc tpch --sf 50 prepare --analyze

I discovered that the data was loaded slowly while the whole cluster is kind of not busy:

6.1 ~ 6.3: 3 TiKV
7.1 ~ 7.2: 2 TiDB

Is it possible to speed up the load process, utilizing more resources?

[breezewish]

Resolved by #101