Technologies/NGINX/nginx_upstream_peers_max_backend
NGINXNGINXMetric

nginx_upstream_peers_max_backend

The max_conns limit for this server.
Dimensions:None
Available on:DatadogDatadog (1)
Interface Metrics (1)
DatadogDatadog
The max_conns limit for this server.
Dimensions:None
Sources
nginx.upstream.peers.max_connsgithub.com
Related Insights (1)
Upstream Connection Pool Saturation Blocks NGINX Workerscritical

When NGINX proxies to backends (PHP-FPM, FastCGI, uwsgi) without proper connection limits, a single site can exhaust the proxy connection pool, blocking other sites on shared infrastructure. Default mod_proxy behavior allows each child process to open max connections equal to ThreadsPerChild × ServerLimit.

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