Top Varnish performance metrics

Varnish Cache is a web application accelerator designed to accelerate content-rich and dynamic websites by using caching HTTP reverse proxying. It stores often-used assets for faster retrieval, reducing the load on the backend server. Monitoring Varnish's key performance metrics, such as client connections, cache hits, thread metrics, and backend metrics, can help ensure its proper operation and performance. Key metrics to monitor include client requests per second, dropped client connections, cache hit rate, LRU Nuked objects, worker threads related metrics, and backend connection failures or unhealthy backends. These metrics provide visibility into the effectiveness of the cache, thread pools, and backend connections, helping identify areas for tuning to improve performance.

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