cramerk@motcid.UUCP (Kristin J Cramer) (09/25/90)
Is it possible to change the maximum on a tunable parameter ?? Can I change the MAX value in the mtune file and rebuild the kernel ?? The question arises from the need to take AT&T SysV 3.2 and set the NSTRPUSH value to something greater than 9 (say 20). Is this at all possible ?? Kris Cramer
tim@delluk.uucp (Tim Wright) (09/25/90)
In <4444@ash14.UUCP> cramerk@motcid.UUCP (Kristin J Cramer) writes: >Is it possible to change the maximum on a tunable parameter ?? >Can I change the MAX value in the mtune file and rebuild the >kernel ?? >The question arises from the need to take AT&T SysV 3.2 and >set the NSTRPUSH value to something greater than 9 (say 20). >Is this at all possible ?? >Kris Cramer With most parameters, the answer is yes. Some of the supposed "Maximum values" defined by AT&T are quite frankly ludicrous. For instance, ULIMIT is something like 6MB. I bump it to 256MB. Similarly, many other parameters can be increased above the "maximum". It really is *most* unhelpful to have misleading values in this file. As to NSTRPUSH, I'm not sure whether this is a hard limit. You can always try, and if it dies, revert to your old kernel. Tim -- Tim Wright, Dell Computer Corp. (UK) | Email address Dell Computer Corp. (UK), Bracknell | Domain: tim@dell.co.uk Tel: +44-344-860456 | Uucp: ...!ukc!delluk!tim "What's the problem? You've got an IQ of six thousand, haven't you?"
cpcahil@virtech.uucp (Conor P. Cahill) (09/25/90)
In article <4444@ash14.UUCP> cramerk@motcid.UUCP (Kristin J Cramer) writes: >Is it possible to change the maximum on a tunable parameter ?? >Can I change the MAX value in the mtune file and rebuild the >kernel ?? It depends. You can get away with this for many of the parameters (and possibly all, but I haven't tested that). The only way to know is to try it, recompile the kernel, reboot and exercise the portion that you changed. (MAKE SURE YOU HAVE A BACKUP KERNEL LAYING AROUND THE ROOT DIRECTORY WHEN YOU TRY THIS!!!!!!) -- Conor P. Cahill (703)430-9247 Virtual Technologies, Inc., uunet!virtech!cpcahil 46030 Manekin Plaza, Suite 160 Sterling, VA 22170
rad@genco.uucp (Bob Daniel) (09/27/90)
In article <4444@ash14.UUCP> cramerk@motcid.UUCP (Kristin J Cramer) writes: >Is it possible to change the maximum on a tunable parameter ?? >Can I change the MAX value in the mtune file and rebuild the >kernel ?? > >The question arises from the need to take AT&T SysV 3.2 and >set the NSTRPUSH value to something greater than 9 (say 20). > Yes, you can change the Max value in the mtune, then use 'idtune' in /etc/conf/bin to retune. Use 'idbuild' to rebuild a new kernel.