Might be a stupid question, but is it easy and safe to upgrade PHP? And how do I do it?
Not heard of Google Pagespeed - I'll check that out, thanks.
Not sure how the sitemap generator is set up - but I wouldn't be surprised if it runs when a page is updated. i'll check this out. Do you recommend that I run the update only when I've updated everything?
For the Cache settings I've turned off the garbage bin settings so nothing goes to garbage - I assume this keeps all pages cached until that specific page is updated? This seems to work OK most of the time but obviously the cache is ignored when I log on and I'm a known user - this is when I see slow responses.
Traffic wise, I'd be surprised if I get 10 - 20 unique visitors a day at the moment. I've had Google adwords running but this was spent out after 10 clicks so nothing major there. I had a Facebook push yesterday and today which may have increased traffic a bit, but I'd guess still in the 10 - 20 bracket. It scares me that if I do increase traffic to 100 + how DH servers can cope.