How can I process the pressure test using AsyncCommit of TXN key type of Tikv ?

[nincro]

Hello, I wanna make a pressure test on the tikv cluster , using the key type of TXN,
but I found in the result log that UseAsyncCommit was all "False".
so I wanna ask if there is a param I can use to enable the UseAsyncCommit, when I process the run step of go-ycsb.
And here is part of the result log may help descript this issue.
Thank you very much !

[nincro]

and here is the param I use now.

[nincro]

@mahjonp