# Sum graph

The sum graph is an overview graph that is most commonly used to spot general load time problems The sum graph shows four lines: seek time (blue), read time (green), delay time (purple) and idle time (red). Each of these meanings is described in the overview. On the x-axis it shows the time (in seconds) and on the y-axis it shows the “accumulated time” of the specific line.

The dotted lines mean the there is no increase in time for that time, hence those lines are idle and do not contribute there.

Tip: If you do not want to see the dotted lines `right-click` the graph and select `Solid idle lines` from the context menu. This will draw the dotted portions of the line the same as the rest of the line.

Tip: If you want to see the time as a one-on-one ratio `right-click` the graph and select `View scale 1:1` from the context menu. This will draw the sum graph so that the one second on the x-axis is the same amount of pixels on the y-axis. For the throughput graph it will make the height of the graph equal to the width.

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