504 Timeout response

[lucadelu]

Hi,

we are facing a problem with a Lizmap docker instance with many requests and a lot of them (from 5% to 20%) are returning 504 response.
Are there any parameters that we can adjust to solve this problem; it is also not clear to me if the problem is coming from NGINX or from PHP

These are examples of the error in the Lizmap error log

2024/05/28 08:02:46 [error] 24#24: *6983 upstream timed out (110: Operation timed out) while reading response header from upstream, client: 172.18.0.3, server: lizmap, request: "GET /index.php/lizmap/service?repository=XXXX&project=XXX&REQUEST=GetMap&SERVICE=WMS&VERSION=1.3.0&FORMAT=image%2Fpng&STYLES=predefinito&TRANSPARENT=true&LAYERS=Comuni&DPI=96&WIDTH=422&HEIGHT=716&CRS=EPSG%3A3857&BBOX=1466974.8586397187%2C5070068.58748574%2C1469768.86422773%2C5074807.578445204 HTTP/1.1", upstream: "fastcgi://172.18.0.24:9000", host: "gishosting.eu", referrer: "https://gishosting.eu/index.php/view/map?repository=XXXX&project=XXXX"
2024/05/28 08:03:20 [error] 22#22: *7030 upstream timed out (110: Operation timed out) while reading response header from upstream, client: 172.18.0.3, server: lizmap, request: "GET /index.php/lizmap/service?repository=XXX&project=XXX&REQUEST=GetMap&SERVICE=WMS&VERSION=1.3.0&FORMAT=image%2Fpng&STYLES=predefinito&TRANSPARENT=true&LAYERS=terreni&DPI=96&WIDTH=422&HEIGHT=716&CRS=EPSG%3A3857&BBOX=1466941.785656906%2C5070035.514502928%2C1469735.7912449173%2C5074774.505462391 HTTP/1.1", upstream: "fastcgi://172.18.0.24:9000", host: "gishosting.eu", referrer: "https://gishosting.eu/index.php/view/map?repository=XXX&project=XXX