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Full Discussion: <DEFUNCT> Processes
Top Forums UNIX for Dummies Questions & Answers <DEFUNCT> Processes Post 1259 by 98_1LE on Tuesday 20th of February 2001 01:12:36 PM
Old 02-20-2001
Defunct processes (also called zombie processes) are processes which were not cleaned up by their parent, and the parent process has died. They cannot be killed without a reboot. I don't worry too much about them.

Edit - I missed the title first time. This was my original; response.
Can you paste what you are seeing? If it is;
UID PID PPID C STIME TTY TIME CMD

UID=User ID the process is running as (typically who started the process)
PID=Process ID of this process (every process has a unique ID)
PPID=Parent process which spawned this process
C=??? I think it has something to do with priority
STIME=When the proess was spawned
TTY=Terminal process is attached to
TIME=Cumulative processor time used by this process
CMD=Actual command that is running

[Edited by 98_1LE on 02-20-2001 at 01:15 PM]
 

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rwsnoop(1m)							   USER COMMANDS						       rwsnoop(1m)

NAME
rwsnoop - snoop read/write events. Uses DTrace. SYNOPSIS
rwsnoop [-jPtvZ] [-n name] [-p PID] DESCRIPTION
This is measuring reads and writes at the application level. This matches the syscalls read, write, pread and pwrite. Since this uses DTrace, only users with root privileges can run this command. OPTIONS
-j print project ID -P print parent process ID -t print timestamp, us -v print time, string -Z print zone ID -n name process name to track -p PID PID to track EXAMPLES
Default output, # rwsnoop Print zone ID, # rwsnoop -.Monitor processes named "bash", # rwsnoop -n bash FIELDS
TIME timestamp, us TIMESTR time, string ZONE zone ID PROJ project ID UID user ID PID process ID PPID parent process ID CMD command name for the process D direction, Read or Write BYTES total bytes during sample FILE filename, if file based. Reads and writes that are not file based, for example with sockets, will print "<unknown>" as the file- name. DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver- bose descriptions explaining the output. EXIT
rwsnoop will run forever until Ctrl-C is hit. AUTHOR
Brendan Gregg [Sydney, Australia] SEE ALSO
rwtop(1M), dtrace(1M) version 0.70 Jul 24, 2005 rwsnoop(1m)
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