icm/max_threads 

This parameter specifies the maximum number of threads in the ICM. The maximum number of threads is therefore the same as the maximum number of connections than can be processed at the same time. The set minimum number of threads (icm/min_threads) is set at ICM startup and also applies during runtime. If the network load is heavy, the ICM starts more threads until the set maximum is reached.

Value Range	Unit	Default Setting
5 - 32000	Integer	50

Operating System Restrictions

The maximum number of available threads in a process can vary, depending on the operating system. It must be possible to set the maximum number of threads at ICM startup. If the network load is heavy, the set maximum is reached.

The maximum number of available threads on different operating systems is restricted by kernel parameters. The maximum number of threads is further restricted by the available stack size. Each worker thread in the ICM requires 512KB stack size.

The table below shows how much the maximum number of threads per process varies on different platforms:

Platform	Threads per Process
Tru64	> 1000
Linux	> 1000
Windows	> 2000
HP-UX	64
Sun Solaris	> 1000
AIX	512

If you reach these limits (especially with HP-UX and AIX, you have to change the kernel parameters in of the operating system. This is explained in the associated documentation.