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max_thread_proc(5) [hpux man page]

max_thread_proc(5)						File Formats Manual						max_thread_proc(5)

NAME
max_thread_proc - defines the maximum number of concurrent threads allowed per process. VALUES
Failsafe Default Allowed values Recommended values DESCRIPTION
is a dynamic tunable that limits the maximum number of threads allowed per process on the system. When tuning the maximum number of threads allowed per process will be the new value of No process will be able to create new threads such that the total count of its threads exceeds Who is Expected to Change This Tunable? System administrators that run applications on their systems requiring a high number of threads per process. Restrictions on Changing The effect of tuning on existing processes is undefined. However, existing threads will not be effected. When Should the Value of This Tunable Be Raised? The value of should be raised if there is a need to run an application that requires a higher number of threads per process than what is currently set to accommodate. Also, if thread creation fails with the value of then it could indicate that the has been reached. However, reaching is not the only reason why a thread creation could fail with may be returned if the system tunable has been reached or memory on the system is exhausted. What Are the Side Effects of Raising the Value? A group of processes may be able to exhaust the system wide limit of threads on the system. When Should the Value of This Tunable Be Lowered? If you feel that it is necessary to limit the number of threads allowed per process. What Are the Side Effects of Lowering the Value? Some applications which need a high number of threads may behave differently or fail to operate. What Other Tunable Values Should Be Changed at the Same Time? You may want to look at the value of WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of HP-UX. Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation, some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun- able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was factory installed on your system, see at AUTHOR
was developed by HP. SEE ALSO
nkthread(5). Tunable Kernel Parameters max_thread_proc(5)

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rtsched_numpri(5)						File Formats Manual						 rtsched_numpri(5)

NAME
rtsched_numpri - number of priority values to support for POSIX.1b realtime applications VALUES
Failsafe Default Allowed Values is allowed. Recommended Value DESCRIPTION
The tunable defines how many priority values to support for POSIX 1.b realtime applications. A larger value provides additional flexibil- ity to applications in managing relative priorities of all threads with respect to each other and with respect to other applications run- ning in the system. However, a larger value adds processing overhead in the operating system in terms of managing larger run queues with the possibility of increased search times. Who Is Expected to Change This Tunable? Anyone. Restrictions on Changing Changes to this tunable take effect at next reboot. When Should the Value of This Tunable Be Raised? When the system is primarily running POSIX realtime applications, and requires additional flexibility in managing relative priorities of applications. What Are the Side Effects of Raising the Value? Raising the value of the tunable may cause some operating system overhead due to larger and possibly more sparse run queues. When Should the Value of This Tunable Be Lowered? The default value of the tunable is already set to the minimum possible value. What Other Tunable Values Should Be Changed at the Same Time? None. WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of HP-UX. Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation, some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun- able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was factory installed on your system, see at AUTHOR
was developed by HP. Tunable Kernel Parameters rtsched_numpri(5)
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