                       // Update sparkline to reflect latest CPU data

                        $('#vm' + i + '_spark').sparkline(vm_array[i]["cpu"], {
                            type: 'line',
                            height: '20px',
                            width: '100px',
                            lineColor: '#aeb7bc',
                            lineWidth: 1.5,
                            fillColor: 'transparent',
                            minSpotColor: 'transparent',
                          