RHEL3 reduce PTHREAD_STACK_MIN

[Aaron_125]

Is anyone familiar with how to reduce the value for PTHREAD_STACK_MIN. Running RHEL3 2.4.21-20.ELsmp getconf shows a value of 16384. thnx -

[Steven E. Protter]

Most kernel changes are made by making echo statements into the appropriate /proc directory.

Under certain cirumstances the kernel may need to be recompiled.

You should make sure there are not dependency values in the kernel before making changes. I'm curious as to why you wish to make this change.

SEP

[Ivan Ferreira]

Why do you need to reduce the value?

I did not found any entries in the /proc filesystem that may allow the change of the value. You may need to edit the kernel source and recompile the kernel.

[Aaron_125]

Thanks guys - we'd like to test with lower min thread size because we believe the app may not require the full min. If we reduced to 8000 and have a couple hundred threads memory usage savings wouldn't be huge but couldn't hurt. Looks like the default PTHREAD_STACK_MIN value for 2.4 and 2.6 kernels is 16384 and wonder if this is an optimized value and changing it could cause system perf degradation/issues..?

[Ivan Ferreira]

I think that as is not a tunable parameter, should be optimized. Anyway, you can more or less restric the values using ulimit.