Limit the viewer's memory usage

--memory-limit

The Rerun Viewer can not yet view more data than fits in RAM. The more data you log, the more RAM the Rerun Viewer will use. When it reaches a certain limit, the oldest data will be dropped. The default limit is to use up to 75% of the total system RAM.

You can set the limit with the --memory-limit command-line argument, or the memory_limit argument of rr.spawn.

Alternatively, you can adjust the limit for an active session also in the viewer's settings. It will be reset to the default the next time you open the viewer.