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How to fix high CPU spikes and optimize slow database queries in high-traffic PHP & MySQL apps?

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Our platform is experiencing severe CPU spikes reaching 95% during peak traffic hours (over 15,000 active sessions).
After checking the MySQL slow query log, several complex JOIN queries on large tables are taking between 3 to 6 seconds to complete.
Could a database specialist share the exact production configuration and caching architecture needed to bring query execution down to under 50ms?
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ago by (160 points)
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