Zombie Process in the Database.

Dear All,
Zombie Process in the Database.
Please help in the above thread.
Thanks in Advance.

884476 wrote:
We are using 10g database with a JAVA based application. Our DBA team is complaining that there are lot of Zombie processes getting created in DB, which is consuming large CPU.Whether a zombie process consumes CPU is debatable - and depends on the definition of a zombie process.
[oracle@csfproddb ~]$top
top - 07:36:00 up 117 days, 3:25, 0 users, load average: 0.19, 0.18, 0.10
Tasks: 222 total,   3 running, 204 sleeping,   0 stopped, 15 zombie
Cpu(s): 12.0%us, 1.0%sy, 0.0%ni, 82.0%id, 4.9%wa, 0.0%hi, 0.1%si, 0.0%st
Mem:   8176308k total, 8129636k used,    46672k free,   136236k buffers
Swap: 10241428k total,    99300k used, 10142128k free, 7044488k cached
oracle    2341 4284 0 Jan31 ?        00:00:00 [zip] <defunct>
oracle    2342 4284 0 Jan31 ?        00:00:00 [zip] <defunct>Defunct processes are child processes that terminated. The process image in the kernel for that process is no more. It no longer exists. It cannot consume CPU.
The reason for still seeing that process via the process listing table in the kernel, is a parent process issue.
When the child process terminates, the kernel sends a signal to the parent process to inform the parent of that. A defunct child process means that the parent process has not (yet) acknowledge that signal. And until it does, the child process entry will remain in the process table.

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