How to determine if TRACE is turned on or off in NuoDB?
The following query result indicates whether the TRACE is ON or OFF:
select VALUE from system.properties where property='DB_TRACE';
More information and examples can be found here.
Note: turning ON the trace flag should be only for limited time and for a specific check. When there is no need for trace turn it off otherwise it may impact the database performance in general and it consume disk space for the logs.