Hi michael, > What happens is, that as soon as I write a bigger e-mail, the system > load goes up from 0 to around 2.5 and when the mail is send, goes back > to 0 again, but there is almost no cpu usage at all. So it should have > something to do with the I/O system I guess. iotop tells me that > cleanup is writing at around incredible 60 kb/s to the disk.
Try running `dstat -tcdngym -D sda,sdb', changing the list of disks to match yours, leaving it to bed in so you know what's normal, and then doing smtp-source to trigger the problem. You might see high `wai', `wait' percentages showing processes are stalled waiting for I/O. > I can even copy to the same partition at normal speed. What type of filesystems are being used? -- Cheers, Ralph. https://plus.google.com/+RalphCorderoy
