Hi Armin,
But all your system memory ie 32GB will not be available as the system
itself and any other processes running on the machine will also
require memory to function. In the Virtuoso performance docs it is
recommended NumberOffBuffers be set 2/3 to 3/5 of system RAM:
http://docs.openlinksw.com/virtuoso/rdfperformancetuning.html
So you need to reduce the setting to at least something less than the
currently available memory which the Linux "top" command would tell
you ...
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
Twitter: http://twitter.com/OpenLink
On 22 Oct 2009, at 11:54, Armin Nagel wrote:
Hi folks,
are there any limitations in numbuffers in virtuoso?
I have a machine with 32gb RAM and 8 Cpu cores.
120GB SSD HDD and running 64Bit Suse Linux.
I installed Virtuoso OS 5.0.11.
My calculation for numbuffers is:
30(gb ram) *1024(in mbyte) *1024(in kbyte) = 31457280K / 8K = 3932160
numbuffers
When I try to start virtuoso I got following error:
OpenLink Virtuoso Universal Server
18:24:17 INFO: Version 05.11.3039-pthreads for Linux as of Sep 28 2009
18:24:17 INFO: uses parts of OpenSSL, PCRE, Html Tidy
18:24:18 ERROR: GPF: disk.c:1294 Cannot allocate memory for Database
buffers, try to decrease NumberOfBuffers INI setting
why does it not work?
I want to load whole ontology datasets(27gb) into memory for
performant
queries.
Thanks for any hints.
--
Armin Nagel
Softwareentwickler
neofonie
Technologieentwicklung und
Informationsmanagement GmbH
Robert-Koch-Platz 4
10115 Berlin
fon: +49.30 24627 257
fax: +49.30 24627 120
[email protected]
http://www.neofonie.de
Handelsregister
Berlin-Charlottenburg: HRB 67460
Geschaeftsfuehrung
Helmut Hoffer von Ankershoffen
(Sprecher der Geschaeftsfuehrung)
Nurhan Yildirim
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