carlopmart wrote: > Hi all, > > I order to reach maximum performance on my centos kvm hosts I have use these params: > > - On /etc/grub.conf: > > kernel /vmlinuz-2.6.18-164.11.1.el5 ro root=LABEL=/ elevator=deadline quiet > > - On sysctl.conf > > # Special network params > net.core.rmem_default = 8388608 > net.core.wmem_default = 8388608 > net.core.rmem_max = 16777216 > net.core.wmem_max = 16777216 > net.ipv4.tcp_rmem = 1048576 4194304 16777216 > net.ipv4.tcp_wmem = 1048576 4194304 16777216 > > > # Disable netfilter on bridges. > net.bridge.bridge-nf-call-ip6tables = 0 > net.bridge.bridge-nf-call-iptables = 0 > net.bridge.bridge-nf-call-arptables = 0 > > # Virtual machines special kernel params > vm.swappiness = 0 > Care to explain some of your choices. In particular why vm.swappiness = 0 and why elevator=deadline over noop. Steve -- Bulletin.net <http://www.bulletin.net/> *Steven Ellis - Director of Worldwide Engineering,* *Bulletin.Net Inc* - http://www.bulletin.net/ *Ph* +64 9 307 1146 *Fax* +64 9 307 1148 *Mo* +64 21 321 673 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20100317/6362449c/attachment-0006.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: bulletin.png Type: image/png Size: 17721 bytes Desc: not available URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20100317/6362449c/attachment-0006.png>
