Steven Ellis wrote:
> 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
>
I use elevator=deadline on kvm host. Under kvm guests I use elevator=noop ...
vm.swappiness is heredated from vmware installations. Is it wrong??
--
CL Martinez
carlopmart {at} gmail {d0t} com