if line =~ /^Reading:\s+(\d+).*Writing:\s+(\d+).*Waiting:\s+(\d+)/
        queue = line.match(/^Reading:\s+(\d+).*Writing:\s+(\d+).*Waiting:\s+(\d+)/).to_a
        output "#{config[:scheme]}.reading", queue[1]
        output "#{config[:scheme]}.writing", queue[2]
        output "#{config[:scheme]}.waiting", queue[3]