On Apr 2, 2012 5:00 PM, "Robert David" <robert.david.pub...@gmail.com> wrote: > > Hi, > > maybe write your hw configuration first. Eg: CPUs, graphic cards, HDDs > (size, speed, type) and others. > > Also provide lspci output and /proc/cpuinfo. > > Then this is a server, maybe with more than one GB nic. If you dont use > spare nics disable them in bios. Do the same with other unneeded stuff. > > If you can access your server and replace cards, remove everything you > dont need. Do not lower fans or dont play with cpu voltage. If you want > to run this server 24/7 it can cause serious problems. It will not save > you much power. Paradoxly this could lead to higher power usage in > some cases, because of hotter devices. > > Remove spare memory cards, if you dont need much memory, etc. > > Robert. > > V Sun, 01 Apr 2012 17:04:58 +0200 > Jarry <mr.ja...@gmail.com> napsáno: > > > Hi, > > > > admin of a colo-center keeps complaining my server is going > > a little over power-limit (which they have set as ~120W per > > 24h/avg, while my server needs ~130-135W). So I need to find > > a way to save at least those 15W, or I will be moved to > > higher tarif (which means higher costs for server-housing). > > > > Before going hard(ware) way, I would like to try first > > all possible software solutions. What I tried up to now is > > cpufreqd, CONFIG_NO_HZ=y, and spindown. In addition to that > > I adjusted fan-speeds to a little lower values and turned > > off some unneeded peripherials (in bios). > > > > Is there anything else I could do? Any tips would be greatly > > welcomed... > > > > Jarry > > > >
I'd rather have *more* RAM than causing unnecessary swaps. Try using a smaller swapfile to reduce swap tendencies. You can always push a larger swapfile into service when needed. There's also a kernel knob to set 'swappiness', but I forget what exactly. Try 'sysctl -a | grep swap' Rgds,
