topic Re: Root filesystem size problem in Operating System - HP-UX

Root filesystem size problem

Venkat_33 — Wed, 07 Dec 2005 04:06:25 GMT

Hi,

We have progress database runing on HPUX and last week i saw the root filesystem 60% free space and today it suddenly decrease to 12% then i restart Progress DB now its came again in normal size ie 60% free size

Pls what would be problem y it happened

Re: Root filesystem size problem

Arunvijai_4 — Wed, 07 Dec 2005 04:09:38 GMT

Is progress DB creating any temp files in / ? Just check the temp files created by Progress DB.

-Arun

Re: Root filesystem size problem

Muthukumar_5 — Wed, 07 Dec 2005 04:17:26 GMT

Monitory / file system by starting DB. Are you sure that only application is using / file system. Is there anyone working in that machine.

du -k / | sort -rnk 1 | more

check this to find most disk using files.

-Muthu

Re: Root filesystem size problem

Sivakumar TS — Wed, 07 Dec 2005 04:18:48 GMT

Dear Venkat,

temp files would be the cause of the issue.

Please check wether the system has a separate /tmp filesystem or it is part of the / ( root ) filesystem. I supspect this !

With Regards,

Siva.

Re: Root filesystem size problem

Venkat_33 — Wed, 07 Dec 2005 04:32:39 GMT

how to check wheterh tmp is separeate filesystem or its under tmp

and also after restart the db how tmp well clear its automatic process

Re: Root filesystem size problem

Venkat_33 — Wed, 07 Dec 2005 04:32:55 GMT

how to check wheterh tmp is separeate filesystem or its under tmp

and also after restart the db how tmp file will clear its automatic process

Re: Root filesystem size problem

Cem Tugrul — Wed, 07 Dec 2005 04:42:37 GMT

Venkat,
As an addition to other replies here are some
useful links for you;
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=626001

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=842012

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=842089

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=226255

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=675915

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=833606

Good Luck,

Re: Root filesystem size problem

Howard Marshall — Wed, 07 Dec 2005 09:38:35 GMT

Use df -k or bdf to check which file systems are mounted

If /tmp is in the list then itâ s a separate file system, otherwise its part of the root file system. Having it part of the root file system is generally a bad idea because you don't really want to fill up your root file system but filling up /tmp is less an issue and easier to recover from.

Something else to consider is the progress db home directory, whether its on the root file system or not, the db could be creating a startup, run, or shutdown log somewhere that gets removed and re-created when the db restarts.

I have a sneeking suspicion that this is one of those things that you are probably never going to see again but if you do here is a good way to check it.

Run this command before and after you start the database to get an idea of where and what is taking up space on the root file system

du -xk / | sort -nr | head -50 > /tmp/du_before.out

After you restart the db and the space is back to 40% free run the same command except redirect it to /tmp/du_after.out and compare the first few lines of the out files. That should tell you where the log files or what ever are.

H

Re: Root filesystem size problem

Andy Torres — Wed, 07 Dec 2005 09:45:24 GMT

Run "bdf /tmp" and it will tell you what filesystem it is a part of (last column).
Example:

# bdf /tmp
Filesystem----------kbytes----used---avail-----%used----Mounted on
/dev/vg00/lvol5-----524288---3400--516944-------1%----/tmp

Re: Root filesystem size problem

Mark Ellzey — Thu, 08 Dec 2005 12:19:53 GMT

Venkat,

I hope you don't have the DB in the root filesystem. Nothing should be in the root filesystem except OS directories and mountpoints.

As mentioned above, you may have some process writing a temp file to root. Not a good idea. Find the process and change it to write to /tmp. That's what /tmp is there for.

Also, check your .bi and .ai files. As I remember, they can grow quite large, if they are not configured correctly. Use promon to check your configuration.

Regards,
Mark

Re: Root filesystem size problem

Geoff Wild — Thu, 08 Dec 2005 14:40:11 GMT

So - you want tmp like on Solaris?

Want /tmp to really be temporary?

Just vi /etc/rc.config.d/clean_tmps and set CLEAR_TMP=1

On next boot - /tmp will be empty!

# cat /etc/rc.config.d/clean_tmps
#!/sbin/sh
# @(#)B.11.11_LR
# List and/or clear temporary files
#
# LIST_TEMPS: Set to 1 to produce a listing of temporary files at startup.
#
# CLEAR_TMP: Set to 1 to remove all files from /tmp at startup.
#
LIST_TEMPS=1
CLEAR_TMP=0

Rgds...Geoff

Re: Root filesystem size problem

Raj D. — Thu, 08 Dec 2005 14:52:35 GMT

Venkat ,

Check if /tmp is a separate FS or its a directory on root.

# bdf | grep tmp
or
# bdf /tmp

Also you can cheeck the root filesystems , largest files with this command:

# cd /
# find / -type f -xdev -exec ls -l {} \; > /tmp/out.txt
# ls -l | sort +4 -5nr | head -30
[ To see 30 largest file ]

And hope fully u can find something , about abnormal space reduction.

hth ,
Raj.

Re: Root filesystem size problem

Raj D. — Thu, 08 Dec 2005 14:56:47 GMT

sorry for wrong syntax in my last post.

After find is complete , the command is , instead of : ls -l | sort +4 -5nr | head -30

its,
# cat /tmp/out.txt | sort +4 -5nr | head -30

Hope u can find something , which consuling much space in root. Also u can get this , when the sizeis 12% free and when the size become 60% free , to know what is exactly happening , and where is the difference.

hth,
Raj.