<p style="margin-bottom:1em;padding:0px;border:0px;font-family:Aspira, Helvetica, Arial, sans-serif;font-style:inherit;line-height:inherit;vertical-align:baseline;color:rgb(85,85,85);">in apache using mod_qos. To limit the number of concurrent requestto a particular vhost i found these two directives</p><p style="margin-bottom:1em;padding:0px;border:0px;font-family:Aspira, Helvetica, Arial, sans-serif;font-style:inherit;line-height:inherit;vertical-align:baseline;color:rgb(85,85,85);">QS_LocRequestLimit <location> <number></p><p style="margin-bottom:1em;padding:0px;border:0px;font-family:Aspira,