Hi Andy, Thank you very much! I want to get the record access and do some research on about caching on TDB. You are right! I need to try it out and see if it can work.
Best regards, Wei On 2014-8-11, at 下午7:20, "Andy Seaborne" <[email protected]> wrote: > Hi there, > > Yes - it should log on every query and indicate every database access (i.e. > the execution of a basic graph pattern). It can be set per-query or > globally. Don't forget to make sure the log4j logging is enabled as well. > > Probably the best way to know exactly what it does is to try it out or look > at the code. > > Look at OpExecutorTDB1. > > What are you trying to achieve? > > Andy > > > On 11/08/14 07:47, Wei Zhang wrote: >> Hello All, >> >> I am new here and want to find out if TDB is useful for my work. >> But first I need to know that if the TDB optimizer level "ALL" provide >> record accesses in every query, then decide if I need to install it... >> Could anyone kindly help on my naïve question? >> >> Thank you very much for your help! >> >> The level are explained here >> (https://jena.apache.org/documentation/tdb/optimizer.html) says "...every >> database access". >> >> Level >> >> Effect >> >> INFO >> >> Log each query >> >> FINE >> >> Log each query and it's algebra form after optimization >> >> ALL >> >> Log query, algebra and every database access (can be expensive) >> >> NONE >> >> No information logged >> >> >> >> Best Regards, >> Wei Zhang >
