Slow download from TeamCity server

If you experience slow seeps when downloading artifacts from TeamCity, try checking the speed on the server machine, downloading from localhost.
If the seeps is OK for localhost, the issue can be in the network configuration or OS/hardware settings when combined with TeamCity(Tomcat) settings.

You can try the following approach:
in <TeamCity home>\conf\server.xml, change default part (port number may be different)

<Connector port="8111" protocol="HTTP/1.1"
               connectionTimeout="60000"
               redirectPort="8543"
               useBodyEncodingForURI="true"
   />

to:

<Connector port="8111" protocol="org.apache.coyote.http11.Http11NioProtocol"
                connectionTimeout="60000"
                redirectPort="8543"
                useBodyEncodingForURI="true"
                socket.txBufSize="64000"
                socket.rxBufSize="64000"
                tcpNoDelay="1"
                                />

and restart TeamCity server.

If this helps, please let us know via email.
If it does not, please revert the settings.
To investigate the case you might need to find an administrator with appropriate network-related issues investigation skills to look into the case.