Very slooooow WP interface

I have a WP site with a back end that’s been maddeningly slow since yesterday. The hosting company told me they were having some issues with Linux servers but I doubt a server issue is my big problem. I’ve been doing a lot of authoring and tinkering in this particular site, testing, viewing changes and so forth. Is there a cache or Restore setting I should adjust to avoid the WP interface becoming gummy?