Increase /tmp size 1

[gallows]

I recently installed Solaris 9 using jumpstart. I had the profile set up to set up 3 partitions: swap - 4gb, /var 10gb and the rest went to root. Apparently /tmp partition is automatically created at 512k. I need to increase it to 4gb. The disk is 72gb, so root partition has plenty of space. Is there a way to increase the /tmp by stealing space from /root partition? I was thinking about doing something like:
mkdir /export/tmp
ln -s /export/tmp /tmp
Will this work? Is there a better or preferred way of increasing /tmp?
I am in the process of rebuilding another server to replace this one and am creating the /tmp along with the other filesystems but won't be able to bring it online anytime soon. Any help or advice is greatly appreciated.

Thanks,
gallows

 

[bfitzmai]

/tmp should be the size of swap space. You should have an entries in /etc/vfstab that looks something like this.

/dev/dsk/c0t0d0s1 - - swap - no -
swap - /tmp tmpfs - yes -

These entries mount the swap space into /tmp.

 

[gallows]

Thanks for the reply bfitzmai. If I do the ln -s /export/tmp /tmp, wont't that mount the swap space into /tmp if I have the entries in vfstab that you described? I'm a little confused)

gallows

 

[bfitzmai]

No... You said you already have 4 GB of swap space alloted. Sounds like to me that swap is not set up correctly. If swap is 4GB then /tmp should be 4GB. Swap is /tmp and /var/tmp. If you do a df -k you should see the sizes of swap /tmp and /var tmp... They should be the same size. If not, you are mounting swap incorrectly.

Now you can add swap space using the swap command. You create a file using the "touch -m 50M <filename>" and swap -a <file name>. I think this is correct, will post the proper commands later today when I get to work. But, if swap isn't set up correctly, doing this will not help.

I have seen workstations with your problem... The person who installed the file system mounted swap as a ufs partition, not knowing swap should remain a raw partition. /tmp was only 512K.. When I looked in the vfstab file, I saw swap was mounted to a mount point /swap. Modifing the /etc/vfstab file to what I posted earlier, corrected the problem.

 

[gallows]

Thanks again bfitzmai. My vfstab has:
/dev/dsk/c1t0dos1 - - swap - no -
swap - /tmp tmpfs - yes size=512

df -lk
swap 5707336 24 5707312 1% /var/run
swap 524288 0 524288 0% /tmp
As you pointed out, swap and tmp should be the same size. This system was installed using Jumpstart. I saw the config file had swap set to 4000 (4gb). There was NOT a separate entry for /tmp. It looks like Solaris 9 created the /tmp automatically and at 512k. So, I want to increase /tmp to the same size as swap, 4gb.

thanks,
gallows

 

[bfitzmai]

Try replacing the option size=512 with a -

 

[bsek]

First try with bfitzmai suggestion in vfstab like,

swap - /tmp tmpfs - yes -

To add swap space from a file system.

#mkfile 40m /export/swapfile

This command will create a 40-megabyte file that can be used for swapping. Enable the new swap file with the swap command:

#swap -a /export/swapfile

Check your change;

# swap -l

swapfile dev swaplo blocks free
/dev/dsk/c0t1d0s1 32,9 8 614872 614872
/export/swapfile - 8 81912 81912


Now two swap areas are defined. Note that no major/minor device numbers are listed for a file system swap file.

To enable the new swap file at the next system boot, add the following entry to /etc/vfstab:

/export/swapfile - - swap - no -

The swap file will be added at boot time by /sbin/swapadd.

 

[gallows]

I won't get a chance until tomorrow to replace the size=512 with the - . Will I need to reboot after doing this?

Thanks,
gallows

 

[bfitzmai]

Not sure if the command mountall will work... Give it a try if not, reboot.

 

[bsek]

You may need to reboot.
Take backup of vfstab file before making any changes.

 

[gallows]

It looks like my boss decided to leave everything as is and not to worry about it since the replacement server will be online fairly soon. I plan on still trying both suggestions, bfitzmai and bsek, and really appreciate your help. I will post back here with the results. It probably won't be any time soon.

gallows

 

[gallows]

I tried bfitzmai's suggestion of replacing the size with a - and it worked like a champ. Thanks bfitzmai and bsek for your help.

gallows