On Sat, May 14, 2011 at 07:39:30PM +0200, Eugen Leitl wrote: > How braindead are the current official squeeze kernels? > Can they be used in production or is there show-stopping > brokenness? I use these kernels on multiple servers, they work for my usecases: isolation of different services like file, mail, dns, web, sql-servers. However, recently I have the feeling servers with a few VServers and many processes behave bad in IO. Probably this is true for non-VServers as well, but I tend to not have these for verification. In numbers: Adaptec 5408 controller, does >300MB/s with the attached disks, with 1300+ processes on the 'idle' server, iotop shows ~5-15MB/s during the day and load 4-20, depending on workhours. One of the processes is a backup client backing up big files. As said, it is a feeling, I have no laboratory benchmark numbers and as I use 'DRBD' on these servers as well and DRBD-IO doesn't show in iotop it might be completly different. Actually none of the users of the server complained about a slow server, but getting a new shell takes its time. This is the background for my cgroup question earlier today, I understand they change the scheduler to schedule groups and might be this improoves my performance experience. Be aware, my VServers are potentially friendly towards each other, I use them for easier management, I don't do tests if the separation actually works or has any flaws. Regards, Adrian -- LiHAS - Adrian Reyer - Hessenwiesenstraße 10 - D-70565 Stuttgart Fon: +49 (7 11) 78 28 50 90 - Fax: +49 (7 11) 78 28 50 91 Mail: lihas@lihas.de - Web: http://lihas.de Linux, Netzwerke, Consulting & Support - USt-ID: DE 227 816 626 Stuttgart