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parameter explanations


Joao Ramires (3411) | asked Mar 08 '17, 11:07 a.m.

Hi all, where can I find more info about some Jena parameters like this ones?
Thanks for your help!

            DESCRIBE Query Strategy
            Indexes cleanup transaction size
            Jena TDB Block Read Cache Size
            Jena TDB Block Write Cache Size
            Jena TDB In memory query results
            Jena TDB Node Caches Size
            Jena index operation logging time threshold (in ms)
            Jena query operation logging time threshold (in ms)
            SPARQL Query abort timeout (in ms)

Joao

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Donald Nong (14.4k313) | answered Mar 08 '17, 8:34 p.m.

These are the parameters exposed in the Advanced Properties for com.ibm.team.jfs.rdf.internal.jena.JenaRdfService. The best article I can find is the below one, which does not include any tuning of parameters at all. My understanding is that we are not supposed to mess around with these parameters.
https://jazz.net/wiki/bin/view/Deployment/UnderstandingJenaAndSPARQL

Even we can change them, I don't see a way for us to appreciate the effect of the changes.

If you suspect that you have some issues with the JFS, I suggest you contact Support.

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