Synopsis

This module allow to return 204 or 444 code for some locations on low memory condition:

http {
    degradation  sbrk=500m;
 
    server {
 
       location /some {
           degrade  204;
       }

Currently it can be used if sbrk(0) syscall reports real memory volume allocated by a proccess.

It does not work for Linux and FreeBSD 7.0+ where malloc() may use mmap(). It can be used on FreeBSD before 7.0 and on 7.0+ if MALLOC_OPTIONS=Dm.

Directives

degradation

syntax: degradation sbrk=mem_used

default: none

context: http

degrade

syntax: degrade error_code

default: none

context: location