Opening a big key doesn't work

I have a big key database, but when I click on it, it doesn't show, there's just a blank window, where there should be paginated keys.
I fixed it by increasing the memory for the file, but I don't know if it's the right way.

Start by reproducing the blank window when opening a large-key Redis database, then trace the pagination and file-memory behavior involved in displaying keys. Compare this with the reported workaround of increasing file memory; done means large databases open successfully and paginated keys appear without requiring that workaround.

Written by the indexing model from the issue text.