如何让闪亮的记忆在会议结束后返回?

I have a shiny app that allows each user to select which data set to load. Everything in the app works wonderful, except for memory usage. After the session is ended and the user closes the web browser, Shiny does not give back the free memory to the machine it is running on. Eventually, after accessing it enough times, it runs out of memory.I have a shiny app that allows each user to sel