On Thu, 2011-04-07 at 16:33 +0200, Kádár Tamás (KTamas) wrote: > However once in a while, someone goes rogue, we > install a new version of thunderbird, someone accidentally sets up an > email account in thunderbird mistakingly leaving the download > everything option on. This causes high IO on our server, and a single > user can quickly more or less kill the whole server in mere minutes, > load average quickly spiking to 30-40-50 and everything becomes > sloooooow (obviously).
So a single process that is reading files fast enough from disk can cause disk IO to spike in a way that makes all other processes wait for available disk IO? I don't think that's a common problem. Typically only that one process would be waiting for disk IO and the load would increase by 1 (or maybe a little bit more, but definitely not by 50).. Maybe you should look into Linux I/O schedulers and see if you're using the wrong one. > Is there any way I can limit the amount of IO a certain user can use? Not in Dovecot.
