Topic "slow speed with debian 8.1"

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Guest




file transfer using SCP protocol with winscp (5.7.4) is really slow only under debian 8.1 jessie. the cpu usage from sshd goes to 100% and the speed breaks down after few seconds to 500~ kb/s. i found out, disabling the feature "optimizing buffer size of connection" in winscp fixes the problem. cpu usage goes to a normal level and the speed goes up to 90 mbit.

FYI: i was using before debian 7 wheezy with the same winscp version and the same sshd config it is working fine.

so it looks like winscp and the feature has a problem with the newest sshd version.

debian 8.1 jessi is using: OpenSSH_6.7p1 Debian-5, OpenSSL 1.0.1k 8 Jan 2015

greets
martin
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Joined: 2002-12-10
Posts: 25034
Location: Prague, Czechia
Thanks for your report. Can you post a complete log files for both setups?
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