My site's cache has always been above 90% since day one. I haven't made any changes to the site, except for new content added every now and then (no more than 3-5 articles a week). Every time I add an article, I'll only clear cache for that particular article and not the entire site.
But suddenly, the cache hit rate dropped from 95% to 70%.
Is there any way I can find out what happened and what might have caused it? And more importantly, if I can fix it?
I've attached the screenshot of my cache hit drop here.