By default, each MyChat account has own list of private dialogues (Ctrl+1). It continues to extend depending on how many people you interact with.


Usually people do not clear their private dialogues manually and the list continuously grows.


To reduce load on the server, you can limit the size of this list. By default, the maximum number of dialogues is 100. If there are more of them, then older dialogues will be deleted. Notice that message history still remain, and only the list of recently opened dialogues changes.


You can change the size of this list: make it bigger or less than a default one.