Using Signals to Control the ICM

Use

You can send the ICM operating system signals to execute functions. This is useful if you want to administrate the ICM from a shell script. All the functions are also available in the ICM monitor.

You can use the same procedure for the SAP Web Dispatcher.

Procedure

The following table lists the signals and their effect on the ICM / Web dispatcher.

Signals and Their Actions

Signal

Action

SIGINT

Downloads

SIGUSR1

Reduces trace level

SIGUSR2

Increases trace level

SIGHUP

Invalidates buffers: host name buffer and server cache

The Web dispatcher updates its configuration of active servers, details of groups, and URL prefixes. Either it gets the information from the message server or from a local file.

You can do the same from the context menu in the Web Administration Interface.

These signals are valid on UNIX platforms only. Under Windows you can use sapntkill to send signals INT, USR1, USR2 to processes. SIGHUP is not supported here.