proxy_cache_background_update leads to 200 ms delay

stephan13360 nginx-forum at
Fri Jul 6 13:55:00 UTC 2018

To clarify a few things:

The delay has nothing to do with the proxy_cache_valid 200 time, this change
only made me realize that there seems to be a problem. Before this change
our web monitoring would always get a cache HIT, and after it mostly got a
STALE response because it checks every minute.

We use NGINX 1.15.0 mainline.

Posted at Nginx Forum:,280434,280437#msg-280437

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