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From Matt Simmons <band...@gmail.com>
Subject Re: Subversion svn+ssh, sshd 100% CPU
Date Wed, 13 Sep 2017 05:20:22 GMT
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 <zoran@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!"

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