Why does iostat show? Could it be that your underlying disk is io-saturated and your CPU spike is due to iowait?
On Tue, Sep 12, 2017 at 12:14 PM Zoran Petkovic <zo...@ietcombustion.com> wrote: > In the past few days I have been doing extensive testing of Subversion > with different clients, operating systems, client and server versions and > have noticed very strange behaviour with windows clients connecting to > Linux servers, hitting them with excessive CPU usage on the sshd process, > where the Linux clients do not exhibit this behaviour. > > > > A sample test setup is as follows: > > Server Linux Ubuntu 16.04.3 LTS, OpenSSH_7.2p2 Ubuntu-4ubuntu2.2, OpenSSL > 1.0.2g 1 Mar 2016, Subversion version 1.9.3 (and 1.9.7). > > Client TortoiseSVN 1.9.7 > > > > When checking out large repositories the linux server is hit on the sshd > process, the process running with 100% cpu usage. This in effect slows down > the performance and ultimately the speed at which the checkout runs. Linux > clients connecting to the same server do not cause this load on the server. > > > > This happens even when compressions is turned off and when encryption > Cyphers are changed, as well as different versions of subversion. The > behaviour is identical. I'm not sure who to address for this issue as this > not only happens with TortoiseSVN but with SlikSVN as well. Any direction > would be appreciated. > > > > Regards, > > > > -- > > Zoran Petkovic > > > -- "Today, vegetables... Tomorrow, the world!"
