Request

Currently, the "All Time" time range in the search UI defaults to [UNIX epoch, current time + 1 year]. Thus, when a user enters a query and the results are displayed, they are usually shown as a single graph near the end of the timeline.

Instead, it would be better to treat "All Time" as spanning the time range of the existing archives.

If I recall correctly, this was original proposed by @junhaoliao.

Possible implementation

Cache the time range of the existing archives on the webserver. When a query is run for "All Time", translate that into a query for the time range of the existing archives.