Hit ratio dropped significantly after recent upgrades

[Dridi Boukelmoune]

> results. So I’m not sure what changed to give such a poor hit ratio, despite
> otherwise good performance on large, busy wikis. It’s possible it could be

Hello Justin,

I'm afraid too many things changed at once, with so many moving parts
it will be hard to find the cause. I suggest you start with transaction logs,
looking essentially at what the backend is responding and how your VCL
is handling it.

Dridi