Apache HTTP Server Version 1.3

Apache module mod_tsunami

This module limits the number of simultaneous requests per vhost.

Status: External
Source File: mod_tsunami.c
Module Identifier: tsunami_module
Compatibility: Available in Apache 1.3.

Summary

This module allows for dynamic limitation of the number of simultaneous requests per vhost. For example, it can be useful if you provide Web sites hosting, and don't want one Web site to use too many resources.

TsunamiEngine directive

Syntax: TsunamiEngine On|Off
Default: TsunamiEngine Off
Context: server config, virtual host
Module: mod_tsunami

Enables or disables mod_tsunami engine. If it is set to off, this module does no filtering at all. Use this directive to disable the module instead of commenting out all the mod_tsunami directives. Example:

    TsunamiEngine on

TsunamiTrigger directive

Syntax: TsunamiTrigger value
Default: TsunamiTrigger 0
Context: server config, virtual host
Module: mod_tsunami

Sets the total number of simultaneous requests allowed on Apache before starting to filter requests. If it is set high enough, no filtering on Web sites usage will be made when Apache load isn't important. It is probably what you want to do. Example:

    TsunamiTrigger 128

TsunamiMaxConnections directive

Syntax: TsunamiMaxConnections value
Default: TsunamiMaxConnections 0
Context: server config, virtual host
Module: mod_tsunami

Sets the maximum number of simultaneous requests allowed per vhost when requests are filtered. All denied requests will get a 503 HTTP return status. When set to 0, filtering is disabled. Example:

    TsunamiMaxConnections 16

Apache HTTP Server Version 1.3