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
