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We are running HAProxy 2.1.8 in front of nginx serving static files and acting as a FastCGI gateway. HAProxy is communicating with nginx using HTTP/2. Clients are regular web browsers, mostly using HTTP/2. Within the HAProxy logs we're sometimes seeing largish 'Tr' values for static file requests. For example 734ms for the example request below. The corresponding request in the nginx log shows a $request_time of 0.000s (http://nginx.org/en/docs/http/ngx_http_log_module.html#var_request_time). HAProxy log line for a static GIF file: > Aug 26 10:23:27 *snip* haproxy[3066]: *snip*:1167 [26/Aug/2020:10:23:26.028] > https~ *snip*/nginx 0/0/0/734/1719 200 6540 - - ---- 19/19/12/12/0 0/0 > {*snip*|*snip*} {*snip*|} "GET *snip*.gif HTTP/2.0" *snip*:59348 5F46381E00F5 Some notes regarding the log format: This is the standard HTTP log format with '%bi:%bp %ID' appended. According to the '%bp' value this was not the first request within the backend connection. The backend connection was established 5 seconds earlier for a HTTP/1.1 request going to PHP. According to the request ID this was the 160th (00A0) request after a reload (I just recently added the logging of %bp). > Aug 26 10:23:21 *snip* haproxy[3066]: *snip*:11594 [26/Aug/2020:10:23:21.148] > https~ *snip*/nginx 0/0/2/69/72 200 27432 - - ---- 19/19/0/0/0 0/0 > {*snip*|*snip*} {*snip*|} "GET *snip* HTTP/1.1" *snip*:59348 5F46381900A0 The two requests in nginx' log: > Aug 26 10:23:21 *snip* abd21141cdb4[5615]: 5F46381900A0 "GET *snip* HTTP/2.0" > 200 27049 0.070 > Aug 26 10:23:26 *snip* abd21141cdb4[5615]: 5F46381E00F5 "GET *snip*.gif > HTTP/2.0" 200 6341 0.000 Note how the timing for the PHP request matches up what HAProxy was seeing: Roughly 70ms / 0.070s. The timing for the GIF request is *way* off, though. Any idea what is happening there? It's not really reproducible in any way. I'll be happy to add more stuff to my logs if that would help. I can also provide specific configuration settings on request. Best regards Tim Düsterhus Developer WoltLab GmbH -- WoltLab GmbH Nedlitzer Str. 27B 14469 Potsdam Tel.: +49 331 96784338 [email protected] www.woltlab.com Managing director: Marcel Werk AG Potsdam HRB 26795 P
