Number of Nginx Worker Processes by Fargate Task Size

Just a memo.

Nginx has a setting that sets the number of worker processes to auto, delegating the count to the number of CPU cores.

worker_processes auto;

I investigated how many processes this results in for various Fargate task sizes.

Results

cpu	mem	number of nginx worker processes
256	512	2
1024	2048	2
2048	4096	4

When I increased the task size, the worker process count properly grew with auto.

By the way,
even if the number of processes increases, you can’t change the net.somaxconn value on Fargate, so
to handle more requests, it’s better to increase the number of tasks.

Also, the following cost the same amount ♪

• cpu=256, mem=512 × 8 tasks
• cpu=2048, mem=4096 × 1 task

Let’s increase the number of tasks!