Is the time from the first client byte received, until last byte sent to the client (regardless of keep alive). Ultimately my goal is to be able to turn on keep-alive between the browser and haproxy with the requirement of being able to run a report that can take 2-3 minutes to run on the app servers. Server SERVER_A 1.2.3.4:80 cookie app_01 check
Http client timeout manual#
Timeout http-keep-alive 500 # from the haproxy manual suggestion of "tens to hundreds of ms" #option httpclose # I just commented this out in favor of http-server-close Here's my haproxy config that I'm working on modifying: global
Http client timeout full#
I want to say that timeout server is the time to wait for the full response, but can anyone confirm that? If I'm right that timeout server is the time to wait for the full response, then am I correct that it shouldn't have any bearing on the keep-alive timeout settings? But what I can't seem to figure out is what timeout server dictates. If I'm understanding the manual correctly, timeout http-keep-alive is the time to keep the connection open between new requests and timeout http-request is the time to wait for the response's headers before closing the connection. I've been studying the haproxy manual for the timeout http-request option, timeout http-keep-alive option, and timeout server option. Now I'm looking into setting up the keep-alive timeouts. I accomplished this with option http-server-close My goal was to enable keep-alive for connection between the browser and haproxy, but disable keep-alive between haproxy and apache.
Right now I don't have keep-alive enabled, but I've been experimenting with enabling it because I think it would help optimize the site. I'm running an Apache website on two app servers living behind a haproxy load balancer.
Http client timeout code#
With third party code this might even be complicated or impossible.I'm trying to wrap my head around how the haproxy options timeout http-request This means that you have to configure the timeout in every cURL call in your code. One important thing to remember is cURL has an indefinite timeout by default and does not obey the default_socket_timeout INI setting. If you want to be more strict and abort on a millisecond level, then you can alternatively use CURLOPT_TIMEOUT_MS and CURLOPT_CONNECTTIMEOUT_MS constants, but the manual warns that this might still only be checked every full second depending on how cURL was compiled and setting a value below one second usually requires to ignore signals with curl_setopt($ch, CURLOPT_NOSIGNAL, 1) to avoid an immediate timeout error. We have much better timeout control with cURL, with two settings one for the connection timeout and one for the maximum execution time: requests performed with for example file_get_contents, fopen, SOAPClient or DOMDocument::load are using this timeout INI setting to decide how long to wait for a response. The default socket timeout in PHP is 60 seconds. For microservice architectures timeouts are important to avoid cascading failures when a service is down. Timeouts are a rarely discussed topic and neglected in many applications, even though they can have a huge effect on your site during times of high load and when dependent services are slow.
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