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〖One〗、When it comes to laying a solid foundation for IIS7 performance, the first step is to meticulously adjust the basic application pool settings. The application pool in IIS7 acts as the container for your web applications, and its default configuration is often too conservative for production workloads. Begin by setting the “Maximum Worker Processes” to a value that matches the number of CPU cores on your server—typically one per core, though some scenarios benefit from a slight oversubscription. This enables the “Web Garden” mode, which allows multiple worker processes to handle requests concurrently, significantly improving throughput under heavy load. Additionally, disable the “Rapid-Fail Protection” where appropriate, or set a higher failure count and longer time window, preventing legitimate temporary errors from shutting down the pool. The recycling settings deserve equal attention: schedule recycling during off-peak hours to avoid disrupting active sessions, and consider using “Specific Time” intervals rather than fixed time intervals. Furthermore, enable “Overlapped Recycling” so that a new worker process starts before the old one shuts down, eliminating request drops. Memory management is another cornerstone—configure the “Private Memory Limit” and “Virtual Memory Limit” based on your application’s memory footprint, but avoid overly restrictive limits that cause frequent recycling. For high-traffic sites, increasing the “Queue Length” from the default 1000 to 5000 or more can buffer burst traffic, but pair this with connection throttling to prevent memory exhaustion. Finally, verify that the “Idle Time-out” is set appropriately (5–20 minutes depending on traffic patterns) to release resources without unnecessary process churn. These fundamental tweaks ensure that IIS7’s core engine runs efficiently, reducing latency and maximizing concurrent request handling from the outset.