ajp_max_temp_file_size
The ajp_max_temp_file_size directive sets the maximum size of temporary files used in AJP proxy operations in NGINX.
Description
The ajp_max_temp_file_size directive determines the maximum allowed size for temporary files that NGINX will create when handling requests that exceed the available buffer sizes during AJP proxying. When an AJP request results in a response larger than what can fit in the configured buffers, NGINX will write the excess data to a temporary file. As files can introduce I/O overhead, controlling the maximum file size is important to ensure that the server operates efficiently and within resource limits. If the response is larger than the specified size, NGINX will terminate the request with an error rather than continue writing to the file, thus protecting against arbitrarily large files from affecting server performance.
This directive can be set in various contexts including http, server, and location, allowing for flexible configuration depending on the needs of different parts of the application architecture. It's essential to balance this setting with the configured buffer sizes to optimize performance and manage server resources effectively. Proper configuration can lead to enhanced performance for applications that utilize the AJP protocol, particularly under load or when large binary responses are expected.
Config Example
server {
listen 80;
location / {
ajp_pass tomcats;
ajp_max_temp_file_size 10m;
}
}Setting ajp_max_temp_file_size too low can lead to failed requests if responses exceed the limit.
Not setting ajp_max_temp_file_size may lead to unbounded temp file usage, affecting disk space.
This directive applies only to responses that are larger than the specified buffer sizes. Make sure buffer sizes are configured appropriately in conjunction.