How to save the view count of a question in memory?

Posted by Freewind on Stack Overflow See other posts from Stack Overflow or by Freewind
Published on 2010-06-18T04:39:55Z Indexed on 2010/06/18 5:23 UTC
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ruby-on-rails

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cache

My website is like stackoverflow, there are many questions. I want to record how many times a question has been visited. I have a column called "view_count" in the question table to save it.

If a user visits a question many times, the view_count should be increased only 1. So I have to record which user has visited which question, and I think it is too much expensive to save this information in the database because the records will be huge. So, I would like to keep the information in memory and only persist the number to the database every 10 minutes.

I have searched about "cache" in Rails, but I haven't found an example. I would like a simple sample of how to do this, thanks for help~

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