Hi, just as a follow-up question:
I know it supports inter-query parallelization, but does it also support intra-query parallelization, i.e. using multiple threads to compute the result of a single query? If yes, which parameter is used to configure this? Cheers, Lorenz On 12.09.2016 05:57, Kingsley Idehen wrote: > On 9/10/16 10:41 PM, giacom...@libero.it wrote: >> So, I have a bunch of questions about Virtuoso. >> >> * Are SPARQL queries performed concurrently (using the standard virtuoso.ini >> configuration)? > Yes, Virtuoso is highly multi-threaded. In addition, it has vectorized > query execution i.e., many query batches per thread, handled concurrently . >> * Are Virtuoso transactions autocommittable, or there aren't any kind of >> transactions when connecting to the ODBC driver? > Depends, by default you have Read Committed Isolation level. >> * Does Virtuoso automatically performs triple indexing before query data? > No, it has indexes in place. > >> In >> some systems I have to configure it manually. >> * Does the usage of ODBC degradates the benchmarking of Virtuoso's SPARQL >> query or the time required to store the triples within a given named graph? > No, if anything that's faster than HTTP. > > Links: > > [1] http://docs.openlinksw.com/virtuoso/isolation/ > [2] > http://wikis.openlinksw.com/VirtuosoWikiWeb/ChangeVirtuosoSDefaultTransactionIsolationLevel > [3] http://docs.openlinksw.com/virtuoso/fn_log_enable.html > [4] > http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtRDFPerformanceTuning > > [5] > http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtBulkRDFLoader#Running > multiple Loaders > > > Kingsley > >> Thanks in advance for any support, >>> JackB >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Virtuoso-users mailing list >> Virtuoso-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/virtuoso-users >> > > > > ------------------------------------------------------------------------------ > > > _______________________________________________ > Virtuoso-users mailing list > Virtuoso-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/virtuoso-users
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