Xubuntu - Filezilla much slower than cli sftp?

Need help with FileZilla Client? Something does not work as expected? In this forum you may find an answer.

Moderator: Project members

Post Reply
Message
Author
dannyboyuk
500 Command not understood
Posts: 2
Joined: 2020-05-17 13:50
First name: Dan
Last name: Mason

Xubuntu - Filezilla much slower than cli sftp?

#1 Post by dannyboyuk » 2020-05-17 13:55

Hi,

I've got a VM running Xubuntu 20.04 and I also have a cloud server with a full duplex 1GB network connection. My ISP connection is 600Mbps

When I download a file from the cloud server using Filezilla it never goes about 7.5 MB/s. If I increase the concurrent downloads I can have 4 or 5 files all coming down at 7.5 MB/s but never more.

If I open up a Terminal and use the OS sftp command to download, I see between 55 - 60 MB/s.

Any ideas why Filezilla is going so slow?

Thanks

User avatar
botg
Site Admin
Posts: 33171
Joined: 2004-02-23 20:49
First name: Tim
Last name: Kosse
Contact:

Re: Xubuntu - Filezilla much slower than cli sftp?

#2 Post by botg » 2020-05-18 08:24

Check your sysctl knobs, your memory limits are too small. The defaults for net.ipv4.tcp_mem and net.ipv4.tcp_rmem are not suitable for modern day networks. There's also an odd behavior in the kernel where a request for a large buffer actually decreases the window scale factor from the default.

dannyboyuk
500 Command not understood
Posts: 2
Joined: 2020-05-17 13:50
First name: Dan
Last name: Mason

Re: Xubuntu - Filezilla much slower than cli sftp?

#3 Post by dannyboyuk » 2020-05-18 18:37

botg wrote:
2020-05-18 08:24
Check your sysctl knobs, your memory limits are too small. The defaults for net.ipv4.tcp_mem and net.ipv4.tcp_rmem are not suitable for modern day networks. There's also an odd behavior in the kernel where a request for a large buffer actually decreases the window scale factor from the default.
Thanks Botg, will check them out!

Post Reply