many hits and connection error

I have put fuller details in the link (it’s to snipboard.io as it isn’t so much a page as an error message).

There are essentially two issues:

1) there is something notifying me that the connection is refused. Not sure what the connection is that I’m supposed to be making, as no more detail, but there’s no indication of a port I should be opening in the firewall or if it relates to connection to the Apache server, so can’t do anything about it. Any ideas?

2) the level of cache hits is 94.9%, and that is showing as a warning for me, on the tool (query monitor) that flags this. It is a big ratio hits:misses, but I’m not sure if

a) I should be concerned with that number of misses – if so what do I do?
b) this means the cache size is too small, or there’s something else wrong, or if there’s likely to be something interfering with the hit/miss activity?

I’m assuming that the hits level
– is too low if it’s getting a warning
– there’s something that can be done
and even that getting a hit is a good thing, or if that’s actually too high rather than too low.

Sorry about this, I’m not entirely sure about what the baseline is, but the query monitor is showing red and that being the focus, so I’m asking before something bigger goes wrong or in case it should be turned off as not working for me.

The page I need help with: [log in to see the link]