Latest revision as of 18:05, 30 April 2012

[edit] 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.

syntax: degradation sbrk=mem_used

default: none

context: http

syntax: degrade error_code

default: none

context: location

@@ Line 14: / Line 14: @@
 </geshi>
-Currently it can be used if sbrk(0) syscall reports real memory volume
+Currently it can be used if sbrk(0) syscall reports real memory volume allocated by a proccess.
-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+
+It does not work for Linux and FreeBSD 7.0+ where malloc() may use mmap().
-if MALLOC_OPTIONS=Dm.
+It can be used on FreeBSD before 7.0 and on 7.0+ if MALLOC_OPTIONS=Dm.
 = Directives =
 == degradation ==
-'''syntax:''' ''degradation mem_used''
+'''syntax:''' ''degradation sbrk=mem_used''
 '''default:''' ''none''
-'''context:''' ''http, server, location''
+'''context:''' ''http''
 == degrade ==