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Operating Systems HP-UX How to clear defunct processes?? Post 302754005 by methyl on Wednesday 9th of January 2013 11:53:39 PM
Old 01-10-2013
In HP-UX zombie processes which are waiting for a hardware resource will not die without a reboot.

Can you post an example process tree?
How many zombie processes do you have on a bad day? Do they ever disappear without a reboot?
What database engine are you using, and do you have a simple explanation for the zombie processes (like users disconnecting untidily)?
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reboot(1M)																reboot(1M)

NAME
reboot - reboot the system SYNOPSIS
time] message] time] message] DESCRIPTION
The command terminates all currently executing processes except those essential to the system, then reboots the system, or halts, or makes the partition ready for reconfiguration. When invoked without arguments, syncs all disks before rebooting the system. Options The command recognizes the following options: Shut down the system and halt. Shut down the system and reboot automatically (default). Shut down the system to a ready-to-reconfigure state and reboot if possible. If the partition is unable to reboot, it will stop at a ready-to-reconfigure state. However, if the option is also specified, the system will always stop at ready-to-reconfigure state. This option is available only on systems that support hardware partitions. Shut down the system to a ready-to-reconfigure state and do not reboot. This option can be used only in combination with the option. This option is available only on systems that support hardware partitions. Do not sync the file systems before shutdown. The and options are ignored with this option. Sync the file systems before shutdown; for file systems that were cleanly mounted, modify the flag from to (default). Quick and quiet. Suppress broadcast of warning messages, terminate processes by brute force (with and immediately call with arguments as indicated by the other options (see reboot(2)). No logging is performed. The and options are ignored with this option. Specify what time will bring the system down. time can be the word (indicating immediate shutdown) or a future time in one of two for- mats: and The first form brings the system down in number minutes; the second brings the system down at the time of day indicated (based on a 24-hour clock). Display message at the terminals of all users on the system at decreasing intervals as reboot time approaches. The message must not contain any embedded double quotes. At shutdown time a message is written in the file (if it exists), containing the time of shutdown, who ran and the reason. Only users with appropriate privileges can execute the command. WARNINGS
does not invoke the shutdown scripts associated with subsystems to bring them down in a cautious manner. See shutdown(1M). If the option is used in a virtual partition environment on a partitionable system, then the requested reconfiguration will not take place until all the virtual partitions on that hard partition are shut down and the virtual partition monitor is rebooted. AUTHOR
was developed by HP and the University of California, Berkeley. FILES
Shutdown log SEE ALSO
vpartition(1), reboot(2), partition(5). reboot(1M)
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