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Serv-U mft / SFTP Connection slows down other transfers and serv-u management console

m_neugebauer over 7 years ago

Hi,

may anyone have a hint for me whats going wrong?

I'm testing the serv-u mft Software.
So far it works fine but I faced a Problem:

Problem:

SFTP connection slows down performance of the Serv-U mft server

- While uploading files per SFTP the serv-U-Management Console is not responding

- While uploading files per SFTP all other operations like FTP-Uploads/downloads extremly slowed down.

System load on the Serv-U mft Server isn't extraordinary high during the SFTP-Connection

Serv-U-MFT Server

VM Windows Server 2102 R2 64bit

2 Cores @2,6 GHz

4GB RAM

Serv-U File Server (64-bit)

Version 15.1.4.6

Install Information

Build Date:‎26‎.‎07‎.‎2016 ‎08‎:‎44‎:‎53

Install Date:‎27‎.‎10‎.‎2016 ‎11‎:‎39‎:‎14

For exampel:

Heres a excerpt from a transmission of some image files per FTP.

I started a SFTP upload on another client. While this SFTP-upload runned

the FTP-Performance of the running FTP-transfers slowed down rapidly.

1_2322215_IMG_3100_JENS_L | 69 KB | 157,2 KB/s | binary | 100%

1_2322215_IMG_3101_JENS_L | 69 KB | 155,5 KB/s | binary | 100%

1_2322215_IMG_3102_JENS_L | 66 KB | 155,8 KB/s | binary | 100%

1_2322215_IMG_3103_JENS_L | 47 KB | 120,1 KB/s | binary | 100%

###################

##### STARTING a SFTP Upload on a different connection

###################

1_2322215_IMG_3104_JENS_L | 83 KB | 2,7 KB/s | binary | 100%

1_2322215_IMG_3105_JENS_L | 66 KB | 0,0 KB/s | binary | 100%

1_2322215_IMG_3106_JENS_L | 84 KB | 3,8 KB/s | binary | 100%

1_2322215_IMG_3107_JENS_L | 36 KB | 5,4 KB/s | binary | 100%

1_2322215_IMG_3108_JENS_L | 72 KB | 8,9 KB/s | binary | 100%

###################

##### After a SFTP Upload on a different connection the FTP speed raise again to higher values

###################

1_2322215_IMG_3109_JENS_L | 62 KB | 11,5 KB/s | binary | 100%

1_2322215_IMG_3110_JENS_L | 69 KB | 14,3 KB/s | binary | 100%

1_2322215_IMG_3111_JENS_L | 44 KB | 16,7 KB/s | binary | 100%

1_2322215_IMG_3112_JENS_L | 65 KB | 19,3 KB/s | binary | 100%

1_2322215_IMG_3113_JENS_L | 69 KB | 22,0 KB/s | binary | 100%

1_2322215_IMG_3114_JENS_L | 55 KB | 25,1 KB/s | binary | 100%

Greetings,

Matthias

Parents

0 m_neugebauer over 7 years ago

Hi,
found it.
Was the logging Settings.

Enabling the logging settings items - "SSH commands" "SSH replies" "SSH detailed commands" "SSH detailed replies" has an impact to the serv-u-performance. If SFTP transfers are running.
Disabling this Items in the logging settings increased the Performance.
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0 calc2014 over 2 years ago in reply to m_neugebauer

Yes, if you have all the logging on for SFTP, particular the detailed logging it will hit your CPU as almost every packet is logged.

That level of logging should really only be for debugging as it is not useful otherwise.
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0 calc2014 over 2 years ago in reply to m_neugebauer

Yes, if you have all the logging on for SFTP, particular the detailed logging it will hit your CPU as almost every packet is logged.

That level of logging should really only be for debugging as it is not useful otherwise.
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