Don't host comments. The day when comments tended to have any value on the web passed ages ago. No one blogs anymore, and no one reads blogs anymore, so most of the traffic you get is just going to be bots or cancerous trolls anyway - if you're lucky enough to get any actual human readers at all in the latter case.

Or use a hosted service like Disqus or an alternative if you want comments, but the better solution is not to bother.