SUMMARY: /usr/ucb/renice problem on Solaris 2.4

From: Law Hon Man (
Date: Fri May 31 1996 - 10:47:41 CDT

Hi Sun Managers,

My original post concerning the nice value in Solaris 2.4 is

>Recently, we discovered that any users on our SPARCstation with
>Solaris 2.4 can changed the nice value of their process to arbitrary
>value (-19 - +19) using /usr/ucb/renice or top (which in fact using
>the system call). From the docs, all users except root cannot decrease
>the nice value of their process. Is there any sys config or patch
>to fix it? Thank you.

Here comes the answers:

I have received 3 replies all of them said that the nice/renice is
broken under Solaris 2.4 and has no effect on the scheduling priority
even the user can change the value.

My real experience:

I have seen a SPARC 20 with one background job (not a NFS server,
it's a pure user machine) and the load average is 3 because the
nice value of the background job is set to -19 !!

Anyway, thanks for all the replies and sorry for making summary so late.
BTW, the problem has been fixed in Solaris 2.5.


Law Hon Man

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