Limit the viewer's memory usage

--memory-limit memorylimit

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 it to use up to 75% of the total system RAM.

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