Sysctl Values ------------------------------------------- net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 net.ipv4.tcp_window_scaling = 1 # vm.max-readahead = ? # vm.min-readahead = ? # HW Controler Off # max-readahead = 1024 # min-readahead = 256 # Memory over-commit # vm.overcommit_memory=2 # Memory to activate bdflush # vm.bdflush="40 500 0 0 500 3000 60 20 0" -------------------------------------------- What's the deal with the options with the "#"? Is the current kernel not supported any more? The ones not commented still work. I did not seem to notice this until migrating settings from a 5 machine not 5.1 but "5". I hate to ask such a dumb question but there seems to be no info from Up The Road Either. Error: sysctl -w "vm.min-readahead=256" error: "vm.min-readahead" is an unknown key Further more nothing is related in here[1] due to kernel parameter related changes. [1] http://www.centos.org/docs/5/html/release-notes/ \ RELEASE-NOTES-U3-en.html#sect-Release_Notes-Kernel_Related_Updates John