08-28-2001
zombies
"zombie" processes do not consume any CPU or
memory whatsoever. The only system resource they
consume is a slot in the process table.
zombies typically occurr when some process
terminates abnormally and it's parent no longer
exists or the process itself is a process group
leader. You may want to check the man page
on the wait(2) system call or the wait(1)
command (in the case of a shell script).
You might want to find out what is causing
these zombies and eliminate the problem at the
source. In any case, removeing zombies will not
do anything to increase performance for the
reason stated above.
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wait(1) General Commands Manual wait(1)
NAME
wait - await process completion
SYNOPSIS
[pid]
DESCRIPTION
If no argument is specified, waits until all processes (started with of the current shell have completed, and reports on abnormal termina-
tions. If a numeric argument pid is given and is the process ID of a background process, waits until that process has completed. Other-
wise, if pid is not a background process, exits without waiting for any processes to complete.
Because the system call must be executed in the parent process, the shell itself executes without creating a new process (see wait(2)).
Command-Line Arguments
supports the following command line arguments:
The unsigned decimal integer process
ID of a command, whose termination is to wait for.
WARNINGS
Some processes in a 2-or-more-stage pipeline may not be children of the shell, and thus cannot be waited for.
SEE ALSO
csh(1), ksh(1), sh-posix(1), sh(1), wait(2).
STANDARDS CONFORMANCE
wait(1)