query processor memory

[Hashim Khan <en...@gmail.com>]

Hi,
    I want to evaluate different triplestores for throughput, based on
queries-per-second. I have to test Jena Fuseki TDB for different sizes of
real and synthetic benchmarks, but I am interested to know the relationship
of 'query processor memory' and throughput. I mean that, what parameters
should I change in order to try Fuseki with different resource (memory,
processing) combinations. I will be waiting for your suggestions.

Best Regards,
*Hashim Khan*

Re: query processor memory

[Andy Seaborne <an...@apache.org>]

There aren't a log of controls.

TDB uses the OS file system cache for indexes so the size of the machine 
is what determimers resources. For the Java heap, don't set it too big 
or the OS won't get space for the filing system cache.

The node table cache can be controlled with "store params" - but usually 
isn't; very uncommon not to use the defaults.

https://jena.apache.org/documentation/tdb/store-parameters.html

(TDB1 and TDB2)

     Andy

On 11/08/2020 09:20, Hashim Khan wrote:
> Hi,
>      I want to evaluate different triplestores for throughput, based on
> queries-per-second. I have to test Jena Fuseki TDB for different sizes of
> real and synthetic benchmarks, but I am interested to know the relationship
> of 'query processor memory' and throughput. I mean that, what parameters
> should I change in order to try Fuseki with different resource (memory,
> processing) combinations. I will be waiting for your suggestions.
> 
> Best Regards,
> *Hashim Khan*
>