The "cfcache" “cfcache” tag in Coldfusion 9 can help with load spikes related to traffic. This can add complexity to a site and should only be used if necessary (do not over optimize!).
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In my very rudimentary tests it made a simple page that queries a database run faster (3.4 ms per request vs. 6.1 ms per request). For spikes like an announcement this could be a pretty big win. The best optimization is to convert to a static HTML page or using SSI, but that isn't isn’t always possible. A static page was similar to the performance of using cfcache (3.5 ms).
There could be other issues with using cfcache (exhaust memory, bad cache hits, etc...etc…), but it could be a good back pocket option and one to explore.
Here's Here’s the example code that I did:
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% ab -c 50 -n 5000 "vanilla cfm site"
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unmigrated-wiki-markup…
Time per request: 6.194 \ [ms\] (mean, across all concurrent requests)
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(using cfcache)
<cfcache
timespan="#createTimeSpan(0,0,10,0)#">
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% ab -c 50 -n 5000 "cfcache page"
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Time per request: Wiki Markup
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(static HTML)
testcf9-vhost
<pre>
To be, or not to be, ...pre> …pre>
% ab -c 50 -n 5000 "static html page"
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Time per request: Wiki Markup
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