Web application caching improves performance by storing frequently accessed data in temporary storage locations. Instead of repeatedly querying databases or executing complex logic, cached data can be returned quickly to users.
Caching can occur at multiple layers, including the application layer, web server layer, and client browser. Application-level caches store computed results or database query outputs. Web servers may cache static assets such as images or scripts, while browsers cache content locally to reduce network requests.
Configuration involves defining cache expiration rules, invalidation strategies, and storage limits. Administrators must carefully balance cache duration to ensure users receive fresh data when required. Poor cache invalidation can cause users to see outdated information, leading to confusion or errors.
Effective caching reduces server load, improves response times, and enhances scalability. Improper configuration, however, can introduce inconsistencies or security risks if sensitive data is cached incorrectly.
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