Fwd: How to WIPE Service with D+ STAT
Rick Stevens
ricks at nerd.com
Mon Apr 13 17:31:10 UTC 2009
alok pandey wrote:
> HI Rick,
> Thanks for your time but I am already aware of what you have stated, I am
> more ,about my other queries, i.e
> --Remove/reload/wipe process who's ps output comes with D+ stat
You really can't. A process in a D state is in an I/O wait state.
Until that I/O is satisfied (disk, network, keyboard, whatever), the
process will remain. The only way out is to either give it the I/O it
wants or reboot. Sorry.
> --How to trace running script/process , were it is blocked/hold (basically
> exact line of script), (any combination of linux command)
You can use the "-p <pid>" option of strace to attach to and trace a
running process.
> --process/users details of using resource ( disk partition, memory, files,
> etc) .(other than fuser)?.
Have you looked at ac/accton/last/sa and their kin? Brief HOWTO:
http://tldp.org/HOWTO/Process-Accounting/index.html
Also have a look at sar and it's bits and pieces.
Note that bottom posting is preferred on this and most of the other Red
Hat/Fedora mailing lists.
> It will be a great help to me if you (or any one) can provide me a pointer
> regarding the same.
> Btw,
> Thanks again for your support.
>
> --Alok
>
>
> On 4/10/09, Rick Stevens <ricks at nerd.com> wrote:
>> alok pandey wrote:
>>
>>> Hi
>>> Recently I experienced a problem on one of user-desktop machine
>>> (centos5.2), when a user(with all access) deleted the file
>>> /var/log/messages to free some space (as df -h was showing /var 100%
>>> full), but still df -h shows 100% full.
>>> It takes around 10 min to figure out the problem. To resolve it, I just
>>> reloaded the syslog service. ( I was luck that user told me what he did
>>> before, otherwise I am sure it will take min of 1 to 2 hour )
>>>
>>>
>>> I want to know that is there any way to get perfect details of such
>>> misguiding output. (one i know is fuser, but i didn't find it's helpful).
>>>
>>> To be more specific about problem I want to know ,Is there any way in
>>> Linux(centos) to do the following :-
>>> --Remove/reload/wipe process who's ps output comes with D+ stat
>>> --How to trace running script/process , were it is blocked/hold
>>> (basically
>>> exact line of script)
>>> --process/users details of using resource ( disk partition, memory,
>>> files,
>>> etc) .
>>>
>> When you free up space in a directory, all of the files in that
>> directory must be closed before the free space will appear. As long as
>> a program holds an open file there, the free space won't appear.
>>
>> In your case, syslog was holding /var/log/messages open so the free
>> space was hidden. When you restarted syslog, it closed
>> /var/log/messages allowing the true state of things to appear. It then
>> reopened the file and life continues.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer ricks at nerd.com -
- AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 -
- -
- To err is human, to moo bovine. -
----------------------------------------------------------------------
More information about the Redhat-install-list
mailing list