Janne Johansson <icepic...@gmail.com> wrote:
> > I'm here asking what > > it is exactly the meaning for 'shared memory' here, and if implying > > that it is eventually the max memory allocable to the graphic card > > is correct. > > No. This is not related to graphics card memory Seems this tweak needs a vast knowledge, a certain kind of usage profile and some practicality with the system tools.. However, I did my homework and I didn't observe any practical difference: I tried this: sysctl kern.shminfo.shmmax=16777216 start: wiz# vmstat -f 3460 forks, 81357 pages, average 23.51 12 vforks, 678 pages, average 56.50 2202 __tforks, 0 pages, average 0.00 49 kthread creations, 0 pages, average 0.00 launching some apps (NetBeans, Firefox) end: wiz# vmstat -f 3706 forks, 87817 pages, average 23.70 14 vforks, 689 pages, average 49.21 2297 __tforks, 0 pages, average 0.00 49 kthread creations, 0 pages, average 0.00 then: sysctl kern.shminfo.shmmax=524288 start: wiz# vmstat -f 3761 forks, 89282 pages, average 23.74 14 vforks, 689 pages, average 49.21 2308 __tforks, 0 pages, average 0.00 49 kthread creations, 0 pages, average 0.00 launching some apps (NetBeans, Firefox) end: wiz# vmstat -f 4003 forks, 95495 pages, average 23.86 16 vforks, 699 pages, average 43.69 2389 __tforks, 0 pages, average 0.00 49 kthread creations, 0 pages, average 0.00 then: sysctl kern.shminfo.shmmax=33554432 start: wiz# vmstat -f 4107 forks, 97977 pages, average 23.86 16 vforks, 699 pages, average 43.69 2485 __tforks, 0 pages, average 0.00 49 kthread creations, 0 pages, average 0.00 end: wiz# vmstat -f 4350 forks, 104204 pages, average 23.95 18 vforks, 709 pages, average 39.39 2568 __tforks, 0 pages, average 0.00 49 kthread creations, 0 pages, average 0.00 I'm guessing that for my usage profile I can go with an optimization like this: > sysctl kern.shminfo.shmmax=524288 Any more feedback? == Daniele Bonini
