71–80 of 107 posts
I am currently building a site and this is definitely an experience that I can learn from. I am wondering, why was the homepage not being cached?
I am currently building a site and this is definitely an experience that I can learn from. I am wondering, why was the homepage not being cached?
There was a cookie set for CSRF protection and the headers specify that content should not be cached if there is a cookie (or more precisely - the cached content includes the cookie as a cache key, so each request with a different cookie gets a cache-miss).
"Note that in 0.8.44 behaviour was changed to something considered more natural. As of 0.8.44 nginx no longer caches responses with Set-Cookie header and doesn't strip this header with cache turned on (unless you instruct it to do so with proxy_hide_header and proxy_ignore_headers). "
Earlier quoted context omitted.
There was a cookie set for CSRF protection and the headers specify that content should not be cached if there is a cookie (or more precisely - the cached content includes the cookie as a cache key, so each request with a different cookie gets a cache-miss).
Slightly different. "Note that in 0.8.44 behaviour was changed to something considered more natural. As of 0.8.44 nginx no longer caches responses with Set-Cookie header and doesn't strip this header with cache turned on (unless you instruct it to do so with proxy_hide_header and proxy_ignore_headers). " http://forum.nginx.org/read.php?2,126312,126316#msg-126316
Thanks for this post, there were some nice tips in there. Although, I do have some nitpicking about your writing style. Maybe it's just me, but I found that your use of "+ve" instead of just saying "positive" and of "&" instead of "and" did not have the intended effect of speeding up reading, quite the reverse actually.
If anyone owns a blog or site that they suspect may appear on HackerNews (especially if you're posting it), then please take the small amount of time to put an instance of Varnish in front of the site. Then, ensure that Varnish is actually caching every element of the page, and that you are seeing the cache being hit consistently. You should expect over 10,000 unique visitors within 24 hours, with most coming in the…
Oh, Well then let me share this. A few weeks ago I got on the front page and within a 24 hour period was hit with 29,000 unique visitors with 38,000 page views. The page itself is image heavy with 1.3 MB on first load. I'm running Wordpress with the Quick Cache plugin by PriMoThemes. I'm hosted on a shared 1and1 server. I've been hit before and went down, that's when I installed the Quick Cache plugin. Also 1and1 mov…
Knowing that I can serve 10 requests per second and likely withstand a frontpage on HN is more useful to me than knowing that I need a way out if and when my web-servers are being totally overwhelmed.
First off, best of luck with your project. Secondly, kudos on writing the post-mortem, as I know it takes some guts to own a "failure". I think, however, the need to write something like this speaks to an incorrection assumption: you need a "launch". Of course, TC and HN can give you a nice bump in traffic and even signups. However, in the long run, this really doesn't accomplish much for you. It gives you the kind o…
However, if your site goes down for any reason a postmortem of this sort is definitely warranted. The word "launch" is not signifying much more than a point in time in this case, and I think you're jumping to a lot of conclusions about what hopes they were pinning on this event.
Whatever was the real cause for your issues, Linode's default small swap space is a plague. A system starts to misbehave much gently if there is enough swap.
edit: typo
Whatever was the real cause for your issues, Linode's default small swap space is a plague. A system starts to misbehave much gently if there is enough swap.