Hello list, I'm confused on how to set the NumberOfBUffers parameter.
I have a machine which gives the following memory information in the top-command when virtuoso is not running: Mem: 24680200k total, 17571268k used, 7108932k free, 58764k buffers Swap: 542716k total, 14732k used, 527984k free, 16981620k cached So about 24 GB in total system RAM in the machine, of which 7 GB seems free. Section 16.16.1 in the virtuoso documentation recommends: System RAM NumberOfBuffers ... 16 GB 1360000 32 GB 2720000 ... So with my 24 GB System RAM, I would set NumberOfBuffers to (1360000+2720000)/2 = 2040000 However, when I look in the virtuoso.ini file, I see the comments: ;; When running with large data sets, one should configure the Virtuoso ;; process to use between 2/3 to 3/5 of free system memory and to stripe ;; storage on all available disks. ;; ;; Uncomment next two lines if there is 2 GB system memory free Notice that here, one talks about '_FREE_ system memory'. So based on these comments, and since I have about 7 GB of free memory (see top output above), and given the recommendations from section 16.16.1 System RAM NumberOfBuffers ... 4 GB 340000 8 GB 680000 ... I would set the NumberOfBuffers parameter to 340000 + 340000*3/4 = 595000 Which of the two is the correct way to set NumberOfBuffers? Thanks, Bart ------------------------------------------------------------------------------ _______________________________________________ Virtuoso-users mailing list Virtuoso-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/virtuoso-users
