Redmine generates two SVG images representing the number of Changes and the number of Revisions in the configured repository. One image shows a month to month break down of Changes vs Revisions. The other image shows the number of Changes and Revisions made by each commiter.
- Revisions is a count of repository commits and is displayed in redish/orange.
- Changes is a count of the number of files that have changed overall and is displayed in blue.
It is known that the SVG images won't render properly using certain browsers and when running Redmine on certain Ruby distribution(s) (versions). See the FAQ-item FAQ#Repository-statistics-doesnt-show-up for a more detailed description of the issue and solutions to solve it.