솔라리스에서 max thread nubmer per process 변경방법?

segkpsize
Description
Specify the amount of kernel pageable memory available. This memory is used primarily for kernel thread stacks. Increasing this number allows either larger stacks for the same number of threads or more threads. This parameter can only be set on systems running 64–bit kernels. Systems running 64-bit kernels use a default stack size of 24 Kbytes.

Data Type
Unsigned long

Default
64–bit kernels, 2 Gbytes

32–bit kernels, 512 Mbytes

Range
64–bit kernels, 512 Mbytes - 24 Gbytes

32-bit kernels, 512 Mbytes

Units
8–Kbyte pages

Dynamic?
No

Validation
Value is compared to minimum and maximum sizes (512 Mbytes and 24 Gbytes for 64-bit systems) and if smaller than the minimum or larger than the maximum, it is reset to 2 Gbytes and a message to that effect is displayed.

The actual size used in creation of the cache is the lesser of the value specified in segkpsize after the constraints checking and 50% of physical memory.

When to Change
This is one of the steps necessary to support large numbers of processes on a system. The default size of 2 Gbytes, assuming at least 1 Gbyte of physical memory is present, allows creation of 24–Kbyte stacks for more than 87,000 kernel threads. The size of a stack in a 64-bit kernel is the same whether the process is a 32-bit process or a 64-bit process. If more than this number is needed, segkpsize can be increased assuming sufficient physical memory exists.

Commitment Level
Unstable

Change History
For information, see segkpsize (Solaris 9 12/02 Release).