id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
2087	"The relationship between directive ""scgi_busy_buffers_size"" and other two directives is not recorded clearly."	zhoushulin1992@…		"In the document of directive ""scgi_busy_buffers_size"", it says that ""By default, size is limited by the size of two buffers set by the scgi_buffer_size and scgi_buffers directives"". Indeed, based on the handling logic in src/http/modules/ngx_http_scgi_module.c, the value of ""scgi_busy_buffers_size"" must be equal or greater than the maximum of the value of ""scgi_buffer_size"" and ""scgi_buffers"" size. So it is recommended to add this information in the doc of ""scgi_busy_buffers_size""(https://nginx.org/en/docs/http/ngx_http_scgi_module.html#scgi_busy_buffers_size).

The same situation happens in directive ""scgi_temp_file_write_size"" in https://nginx.org/en/docs/http/ngx_http_scgi_module.html#scgi_temp_file_write_size, and directive ""scgi_max_temp_file_size"" in https://nginx.org/en/docs/http/ngx_http_scgi_module.html#scgi_max_temp_file_size. They should all be equal or greater than the maximum of the value of ""scgi_buffer_size"" and ""scgi_buffers"" size.


What's more, the value of directive ""scgi_busy_buffers_size"" must be less than (number-of-scgi_buffers - 1)*size-of-scgi_buffers. This also should be recorded."	enhancement	closed	minor		documentation	1.18.x	duplicate		zhoushulin1992@…	Linux xlarge 4.15.0-72-generic #81-Ubuntu SMP Tue Nov 26 12:20:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.18.0
built by gcc 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configure arguments: --prefix=/usr/local/nginx --with-pcre=/root/Downloads/pcre-8.43"