We have been trying to update the virtual memory settings on our Oracle database servers, I wanted to see what the recommended settings were, we have been using these as previously recommended by Oracle:
vm.swappiness = 0
vm.dirty_background_ratio = 3
vm.dirty_ratio = 80
vm.dirty_expire_centisecs = 500
vm.dirty_writeback_centisecs = 100
I see that after 6.4 we were advised to update the swappiness to 1, did any of these other values change? Also we currently use the kernel 3.8.13-55.1.5.el6uek and will be updating to 3.8.13-98.2.1.el6uek when we upgrade to Oracle 6.7. Does using the UEK3 kernel make a difference with these settings?