$h{$ddhh  }{$database}{total} += $speed;
$m{$ddhhmm}{$database}{total} += $speed;
$h{$ddhh  }{$database}{max}    = max(($h{$ddmm}{$database}{max} || 0), $speed);
$m{$ddhhmm}{$database}{max}    = max(($h{$ddmm}{$database}{max} || 0), $speed);