[nzlug] process

[Hadley Rich]

On Monday 13 November 2006 09:59, anru chen wrote:
> hi :
>
> when i issued "ps aux" command, i saw some processes have "SN" field
> under STAT column, just want to know what is "N" mean.
>
> regards,
>
> anru


Excerpt from the ps man page (from where it is probably easier to read):

PROCESS STATE CODES
       Here are the different values that the s, stat and state output 
specifiers (header "STAT" or "S") will display to describe the state of a 
process.
       D    Uninterruptible sleep (usually IO)
       R    Running or runnable (on run queue)
       S    Interruptible sleep (waiting for an event to complete)
       T    Stopped, either by a job control signal or because it is being 
traced.
       W    paging (not valid since the 2.6.xx kernel)
       X    dead (should never be seen)
       Z    Defunct ("zombie") process, terminated but not reaped by its 
parent.

       For BSD formats and when the stat keyword is used, additional 
characters may be displayed:
       <    high-priority (not nice to other users)
       N    low-priority (nice to other users)
       L    has pages locked into memory (for real-time and custom IO)
       s    is a session leader
       l    is multi-threaded (using CLONE_THREAD, like NPTL pthreads do)
       +    is in the foreground process group


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