Hello,
could anybody point out some doc/examples for doing some performance tuning?
I have been playing (in a linux box with 16GB RAM, 1 CPU, ...) with some
params (numberofbuffers, maxcheckpointremap, O_DIRECT, etc) as indicated in:
http://virtuoso.openlinksw.com/wiki/main/Main/VOSScale
http://docs.openlinksw.com/virtuoso/rdfperformancetuning.html
however, our system is still pretty slow or even no responsive :-( while
launching some SPARQL queries...
on the other hand, we're planing on buying a new server. Could anybody
recommend some specs (RAM, CPU, disks, ...) so that it could
"steadily/reasonably" cope with huge amounts of data (about 160GB in RDF
files). Any advice for the hard disks spec (type: SCSI, ...; IO rate;
...)? config (striping, ...)?
thanks in advance!
Erick
p.s. while setting the param FDsPerFile to 16 for isntance, I've got an
error while re-starting virtuoso:
12:15:54 Cannot open stripe on /virtuoso/db/right/db-seg32-2.db (24)
12:15:54 Server exiting
should that param be set the first time the system is started (due to
the striping?)?
