NGINX Upstream Keepalive: Connection Pooling Guide [2026]
by Danila Vershinin, January 26, 2026
Learn how to configure NGINX upstream keepalive for connection pooling to your backend servers. This comprehensive guide covers the keepalive directive, tuning parameters, preventing TIME_WAIT socket exhaustion, and optimizing microservices and API gateway performance.
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by Danila Vershinin, March 20, 2016
Let’s talk about importance of Keep-Alive in HTTP and how you can enable it in Nginx, Apache and Varnish
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