WordPress can scale from a few visitors per day to millions. While it can be complicated to get WordPress to run in a clustered setup, most sites don’t need this.
While developing WordPress managed hosting, one of the discoveries was that WordPress can not only scale, but it can handle millions of visits per month with a single web machine and MySQL.
I’ll walk through the basics of performance in WordPress, and what it takes to build a highly performing install on a single VPS + MySQL, dispelling the myth that it requires a large amount of resources to handle a huge amount of traffic with WordPress.
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