Hsqldb - 进程崩溃时数据将如何保留

I want data should commit in hsqldb data file while process crashes without logging to log file. I set one command "SET FILES WRITE DELAY FALSE" But it needs log file enabled to persist the data.As logging will create performance impact i dont want it.So is there any way to achive this objective.I want data should commit in hsqldb data file w