NimbostratusIssue with worker_connections limits in Nginx+
Hello Nginx Community,
We are using Nginx+ for our Load Balancer and have encountered a problem where the current worker_connections limit is insufficient.
I need our monitoring system to check the current value of worker_connections for each Nginx worker process to ensure that the active worker_connections are below the maximum allowed.
The main issue is that I cannot determine the current number of connections for each Nginx worker process.
In my test configuration, I set worker_connections to 28 (which is a small value used only for easily reproducing the issue). With 32 worker processes, the total capacity should be 32 * 28 = 896 connections.
Using the /api/9/connections endpoint, we can see the total number of active connections:
{
"accepted": 2062055,
"dropped": 4568,
"active": 9,
"idle": 28
}Despite the relatively low number of active connections, the log file continually reports that worker_connections are insufficient.
Additionally, as of Nginx+ R30, there is an endpoint providing per-worker connection statistics (accepted, dropped, active, and idle connections, total and current requests). However, the reported values for active connections are much lower than 28:
$ curl -s http://<some_ip>/api/9/workers | jq | grep active
"active": 2,
"active": 0,
"active": 1,
"active": 2,
"active": 1,
"active": 1,
"active": 0,
"active": 0,
"active": 3,
"active": 0,
"active": 0,
"active": 0,
"active": 2,
"active": 2,
"active": 0,
"active": 1,
"active": 0,
"active": 0,
"active": 0,
"active": 0,
"active": 0,
"active": 0,
"active": 0,
"active": 2,
"active": 1,
"active": 2,
"active": 1,
"active": 0,
"active": 1,
"active": 0,
"active": 0,
"active": 1,
Could you please help us understand why the active connections are reported as lower than the limit, yet we receive logs indicating that worker_connections are not enough?
Thank you for your assistance.
