Hello
Not a java person much yet either so pardon the naivity.
I found the tdb_init file in TDBROOT/bin
I set the JVM_ARGS to be -Xmx1200m -Xms512m
I did it like this
## ---- JVM Args e.g. -Xmx1200M
JVM_ARGS=${JVM_ARGS:-Xms512m -Xmx1200m -server}
I find the following in the fuseki-server script
exec java -Xmx1200M -jar "$JAR" "$@"
So it should be using the heap of 1200M there at least and that runs out of
memory as well.
I should say this generated dataset is more than 500MB on disk. Hence
asking about smaller benchmark datasets.
Thanks a bunch for any help
Bruce
On Thu, Oct 27, 2011 at 4:35 PM, Andy Seaborne <[email protected]> wrote:
> On 27/10/11 21:15, Bruce Craig wrote:
>
>> We are new to JENA* and thought we would first try to replicate benchmarks
>> for the tools that we have seen mentioned.
>> One which aligned well with the kinds of work we are pursuing was the
>> Social
>> Network Intelligence Benchmark (
>> http://www.w3.org/wiki/Social_**Network_Intelligence_BenchMark<http://www.w3.org/wiki/Social_Network_Intelligence_BenchMark>)
>> We downloaded the generator and created what seems like a huge dataset.
>> Nonetheless we succeeded in creating a TDB data store we think with
>> tdbloader. However, any attempts to tdbdump and query with arq or
>> tdbquery
>> or connect and query with fuseki greets us with heap memory failures.
>>
>
> Out of heap? What heap size are you using? TDB does not flex with heap
> size (in the last release).
>
> On a 32 bit JVM, use -Xmx1200M
> On a 64 bit JVM, don't push the heap size up too high (caching of indexes
> isn't in the heap; nodes are though).
>
> Seeing the stacktrace would be useful.
>
> Andy
>
>
>> We dont really need DBpedia scale as yet so we were looking for experience
>> and guidance on
>> a) Setup of basic tool set - any hidden caveats?
>> b) Suggestions for more modest datasets to use in environments on VM linux
>> systems with 2-4GB RAM.
>>
>> Regards
>>
>> Bruce
>>
>>
> (caution - that wiki page documents XSD datatimes as being
> "2011-02-22 09:43:13"^^xsd:dateTime
>
> they are not. TDB (nor ARQ) will recognize that as a dataTime. No space,
> use a T.
>
> e.g.
> "2011-02-22T09:43:13"^^xsd:**dateTime
>
