id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1732	Warn for large request bodies	Leif Pedersen		"Currently, this warning floods our log files:

`2019/02/25 11:17:46 [warn] 73578#101263: *13497288 a client request body is buffered to a temporary file /var/tmp/nginx/client_body_temp/0000000957, `[snip]

We keep `client_body_buffer_size` low and `client_max_body_size` high so we can accept large uploads with minimal memory usage and let the kernel's disk cache sort out what to keep in memory. As a result, this warning describes an event that is perfectly normal and reasonable. The noise obscures more important messages. 

On the other hand, there's nothing to indicate danger if clients are sending request bodies that are near the limit specified by `client_max_body_size` without unnecessarily committing a lot of memory to uploads.

What I'd suggest is, first take out this warning completely. Then add a new setting called (for example) `client_warn_body_size`. When the body size reaches this setting, emit a new warning such as ""a client request body is larger than client_warn_body_size (%d bytes)"". That way the sys admin can see when the clients are approaching `client_max_body_size` and either raise `client_max_body_size` or adjust the client before the limit becomes apparent to users. Perhaps my proposed `client_warn_body_size` could default to match whatever `client_body_buffer_size` is set to."	enhancement	new	minor		other	1.15.x					"nginx version: nginx/1.14.2
built with OpenSSL 1.0.2o-freebsd  27 Mar 2018 (running with OpenSSL 1.0.2k-freebsd  26 Jan 2017)
TLS SNI support enabled
configure arguments: --prefix=/usr/local/etc/nginx --with-cc-opt='-I /usr/local/include' --with-ld-opt='-L /usr/local/lib' --conf-path=/usr/local/etc/nginx/nginx.conf --sbin-path=/usr/local/sbin/nginx --pid-path=/var/run/nginx.pid --error-log-path=/var/log/nginx/error.log --user=www --group=www --modules-path=/usr/local/libexec/nginx --with-file-aio --http-client-body-temp-path=/var/tmp/nginx/client_body_temp --http-fastcgi-temp-path=/var/tmp/nginx/fastcgi_temp --http-proxy-temp-path=/var/tmp/nginx/proxy_temp --http-scgi-temp-path=/var/tmp/nginx/scgi_temp --http-uwsgi-temp-path=/var/tmp/nginx/uwsgi_temp --http-log-path=/var/log/nginx/access.log --with-http_v2_module --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-pcre --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --without-mail_imap_module --without-mail_pop3_module --without-mail_smtp_module --with-mail_ssl_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-threads --with-mail=dynamic --with-stream=dynamic"