topic Re: How to increase the /tmp size in suse10 in Operating System - Linux

How to increase the /tmp size in suse10

senthil_kumar_1 — Thu, 08 Apr 2010 13:35:54 GMT

Hi All,

My existing /tmp having less space.

Ex:

# dh -h
/dev/sda9 1.1G 460M 569M 45% /tmp

Now I would like to increase the /tmp space

How to do that?

Re: How to increase the /tmp size in suse10

Matti_Kurkela — Thu, 08 Apr 2010 13:57:37 GMT

The disk device name /dev/sda9 indicates your system is not using LVM, so extending the partition may be rather complicated.

Please show the output of "fdisk -l /dev/sda". Planning a non-LVM partition extension is not possible without knowing the layout of the partitions on the disk.

MK

Re: How to increase the /tmp size in suse10

senthil_kumar_1 — Thu, 08 Apr 2010 14:03:29 GMT

# fdisk -l

Disk /dev/sda: 32.2 GB, 32212254720 bytes
255 heads, 63 sectors/track, 3916 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 514048+ 83 Linux
/dev/sda2 65 195 1052257+ 82 Linux swap / Solaris
/dev/sda3 196 326 1052257+ 83 Linux
/dev/sda4 327 3916 28836675 f W95 Ext'd (LBA)
/dev/sda5 327 849 4200966 83 Linux
/dev/sda6 850 1241 3148708+ 83 Linux
/dev/sda7 1242 1437 1574338+ 83 Linux
/dev/sda8 1438 1699 2104483+ 83 Linux
/dev/sda9 1700 1830 1052226 83 Linux
/dev/sda10 1831 3916 16755763+ 83 Linux

Can we do this through single user mode or rescue mode?

Re: How to increase the /tmp size in suse10

Tim Nelson — Thu, 08 Apr 2010 16:47:16 GMT

from your fdisk info the sda drive is completely allocated

either delete any/some unused partions or find another disk, partition it for /tmp use and move your data.

/tmp indicates temporary , so I have to ask the question.. why not just delete stuff ?

most servers may/will delete all files in /tmp on reboot anyway.

maybe move some of these "temp" files to some different filesystem ?

you still have 600MB free, how much more do you want ?

Re: How to increase the /tmp size in suse10

senthil_kumar_1 — Thu, 08 Apr 2010 18:05:27 GMT

Hi Tim,

My application requires 8GB of free space in /tmp.

So I need to make /tmp to have atleast 8GB.

I have one disk /dev/sdb with 10GB and I have created 8GB partition (/dev/sdb1) and filesystem also created using the command "mkfs".

Now can I follow below stpes to mount the disk (/dev/sdb1) as /tmp.

1)Copy all existing data from /tmp to any other place.

2)unmounting /tmp

# umount /tmp

3)mounting /dev/sdb1 to /tmp

#mount /dev/sdb1 /tmp

Are the above steps correct?

Re: How to increase the /tmp size in suse10

Tim Nelson — Thu, 08 Apr 2010 19:31:04 GMT

yes that would work.

or something like below

mount /dev/sdb1 /newtemp
cd /tmp
cp -rp * /newtemp/
cd /
umount /newtemp
umount /tmp
edit /etc/fstab to reflect /dev/sdb1 as /tmp
mount /tmp

another thought, as other temp files are mixed into /tmp you may also be able to mount your new disk somewhere else and change the application to write its "temp" files to there ?

I say that for two reasons.
1) Many parts of the OS depend on /tmp and its world-writable permissions
2)some people, like myself, will delete EVERYTHING in /tmp if there are filesystem full issues.

Re: How to increase the /tmp size in suse10

Tim Nelson — Thu, 08 Apr 2010 19:47:50 GMT

one more comment..

1) in order to un-mount the old /tmp your application cannot have any open files ( e.g. shutdown application)

Re: How to increase the /tmp size in suse10

Alan_152 — Fri, 09 Apr 2010 14:05:19 GMT

A gpartd livecd "might" help shuffle the partition sizes around so that you can free up enough space for /tmp. However, you might have better luck installing another disk drive, flash card, or usb stick and mounting /tmp to it instead.

Re: How to increase the /tmp size in suse10

senthil_kumar_1 — Tue, 20 Apr 2010 09:25:11 GMT

Hi All,

I am not able to umount /tmp.

I have used following steps by root

# runlevel
N 5

# cd /tmp

# ll
total 0

# cd /

# fuser /tmp

# fuser -k /tmp

# umount /tmp
umount: /tmp: device is busy
umount: /tmp: device is busy

# df -h
/dev/sda9 1.1G 33M 996M 4% /tmp

Actually I would like to mount the different partition (/dev/sdb1) to /tmp, but /tmp is already mounted with some other partition (/dev/sda9), so that I have ummounted /tmp , but It did not succeeded.

Shall I try this from runleve 1?

How to solve this issue?

Re: How to increase the /tmp size in suse10

TTr — Tue, 20 Apr 2010 11:23:02 GMT

> My application requires 8GB of free space in /tmp

Can you tell this application to use a different temp? Maybe through the $TMPDIR variable or something similar. Check within the application if you can redifine temp. You can then mount the new disk and use that for the application new temp.

Re: How to increase the /tmp size in suse10

senthil_kumar_1 — Tue, 20 Apr 2010 12:03:02 GMT

Hi TTr,

There is no option to tell application to use different tmp.

The following command is not giving any output:

#echo $TMPDIR

Re: How to increase the /tmp size in suse10

TTr — Tue, 20 Apr 2010 12:17:32 GMT

$TMPDIR is not normally set so echo $TMPDIR would not output anything. You have to find out if the application will utilize a $TMPDIR variable so that you can set it to the new disk. The app may not even use TMPDIR it may use something different.

Re: How to increase the /tmp size in suse10

Tim Nelson — Tue, 20 Apr 2010 12:55:27 GMT

as mentioned earlier you will probably need to shut down the application in order to unmount /tmp.

use lsof to ID open files in /tmp
lsof /tmp

TTr also has a valid idea, get the app out of /tmp and send to dedicated filesystem if possible using $TMPDIR. This will make life easier in the long run trying to troubleshoot later.

Re: How to increase the /tmp size in suse10

Steven E. Protter — Tue, 20 Apr 2010 13:41:15 GMT

Shalom,

There is no option to tell application to use different tmp.

The following command is not giving any output:

#echo $TMPDIR

This methodology works with Oracle and other application software, but does not work universally.

Best bet to deal with the /tmp problem is to boot the system into single user mode.

At the conole:

Boot, intervene at the prompt that displays the kernel.

move down to the boot kernel, press e for edit.

add single to the end of the boot line.

b

You boot to single user mode, no applications are running and you can make /tmp as big as you wish.

SEP

Re: How to increase the /tmp size in suse10

Alan_152 — Tue, 20 Apr 2010 14:49:15 GMT

"Actually I would like to mount the different partition (/dev/sdb1) to /tmp, but /tmp is already mounted with some other partition (/dev/sda9), so that I have ummounted /tmp , but It did not succeeded."

1) install and format new device
2) change fstab to point tmp to new device
3) reboot