SymptomsNote, 'mod_bw' package should be installed in order to use this feature. This package comes with Plesk and can be setup using autoinstaller or manually (it is located in 'opt/bw/' directory in Plesk distribution.
Since Plesk 8.3 it is possible to limit bandwidth and maximum number of HTTP connections per domain basis. To do it:
1. Click the Domains shortcut in the navigation pane.
2. Click the domain name you need.
3. Click Performance.
4. Select the Switch on bandwidth limiting check box, and in the Maximum network use (KB/S) box, type the maximum speed in kilobytes per second that a site can share among all its connections. For example: 128.
5. Select the Switch on connections limiting check box, and in the Connections limited to box, type the maximum number of simultaneous connections. For example: 20.
6. Click OK.
Note: bandwidth limiting increases the server load. Actually, this feature is useful only if you have low speed Internet connection and wish to limit HTTP traffic for some domain.