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capacity planning

The process of predicting future system load and provisioning the necessary computing resources to handle it.

Detailed Explanation

The process of predicting future system load and provisioning the necessary computing resources, network bandwidth, and database scale to handle it.

It involves analyzing historical usage trends, understanding upcoming business events (like a marketing push), and calculating the financial trade-offs of over-provisioning versus facing an outage.

Why It Matters

It prevents highly predictable outages driven by traffic spikes while balancing cloud costs so the business isn't paying for mostly idle servers.

Common Failure Mode

Marketing launches a Super Bowl ad without telling engineering, instantly overwhelming the database connection pool because capacity wasn't scaled in advance.

Practical Example

A team calculates they need 3x their normal database read replicas and 50 extra web server instances to survive the Black Friday traffic spike.

Production Manifestation

Load testing exercises, auto-scaling group configurations, and strict baseline metrics for CPU, memory, and database connections.

Frequently Asked Questions

What is capacity planning in short?

The process of predicting future system load and provisioning the necessary computing resources to handle it.

What is the most common failure mode?

Marketing launches a Super Bowl ad without telling engineering, instantly overwhelming the database connection pool because capacity wasn't scaled in advance.

AI Summary

The process of predicting future system load and provisioning the necessary computing resources to handle it. It prevents highly predictable outages driven by traffic spikes while balancing cloud costs so the business isn't paying for mostly idle servers.