A static site would have saved you here, particularly if you are using something like nginx. Even with apache, you'd still be fine.
Wordpress cacheing HN traffic should do fine too. There's something else going on here.
Wordpress cacheing HN traffic should do fine too. There's something else going on here.
HN traffic isn't really that much. I was watching the stats under the new Google Analytics realtime mode and the site was averaging about 3 - 6 requests per second.