On 22/11/17 10:55, Marco Neumann wrote:
i have noticed that a single fuseki instance spans quite a number of
worker process (~32-35) on one of our root servers ( x86_64 GNU/Linux)
with 8 cores and 128gb ram + ssd.
does jena fuseki /tdb take full advantage of the extras cores on full
load with these workers?
Fuseki runs one thread per request (nearly - sorting can us multiple
threads).
It would be nice to execute with more threads but the time to do this ...
It's jetty starting the threads.
(32 seems a lot but maybe Jetty is allocating based on core+HT count)
Andy
On Wed, Nov 22, 2017 at 11:22 AM, David Moss <[email protected]> wrote:
Upgrades are application specific. You need to look at the logs for your
current system and see if processor is maxing out of memory is swapping out to
disk too much. 2GB RAM looks a bit small but that is irrelevant if your
processor is at 100% all the time. You might also consider your disk access
time. Faster disks might be a better buy if your processor and RAM look OK.
David Moss
________________________________
From: John Sanders <[email protected]>
Sent: Wednesday, November 22, 2017 10:40:38 AM
To: [email protected]
Subject: Advice on hardware upgrade
Hi, I'm running a Fuseki server on a rather small server. I'm willing to
upgrade it a little bit (since it's handling a lot of requests) so I was
wondering which single component I could upgrade to get the best possible
return. This I suppose boils down to either more RAM or a better CPU.
Currently the server is an old Pentium4 3GHz with 2gb of RAM, so if I have
some money to spend on it, would I be better buying more RAM or a better CPU?
In the second case (a better CPU), would Fuseki benefit more from a faster one
(higher frequency) or one with more cores/threads (I assume Fuseki is a
multi-threaded application)? Thank you all.
