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Modify /var/run.

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Operating Systems Solaris Modify /var/run.
# 1  
Old 09-27-2011
Modify /var/run.
Hello,
I want to modify the /var/run fs from 86G to say 2G. How to go about it? Thanks.
Code:
swap 64G 38K 64G 1% /var/run

Regards.
Edit/Delete Message
Last edited by DukeNuke2; 09-27-2011 at 07:17 AM..
# 2  
Old 09-27-2011
/etc/svc/volatile, /var/run, and /tmp are all part of the swap filesystem.

You need to add disk to the system - in other words, create a new slice. Then use swap -a to add the slice. Creating lots of separate small slices in swap is a sure way to slow down the system. Make sure you've got it right.

And /var/run, and /tmp should NEVER be allowed to fill up. Change apps that are proliferating junk files in there. Or write a script to clean up after them.

Why? The system will rollover and die if you completely fill swap.
# 3  
Old 10-03-2011
Hello Jim,
Thanks a lot for your reply. However here I wish to reduce my /var/run from 64GB to 2GB. So what needs to be done?

Regards,
Mahive.
# 4  
Old 10-03-2011
Finding out what's taking all that space would be a good start...
# 5  
Old 10-03-2011
I think it means it has 64G total space and 34K used, big waste of 62G which he wants to shrink the filesystem by.
# 6  
Old 10-03-2011
Removing RAM modules would be good start ... Smilie

Seriously, shrinking the virtual memory space should be done with caution.
# 7  
Old 10-06-2011
You may have already considered crash dumps, but just in case I thought I would mention it....

Assuming you're using the OS defaults (run dumpadm to check) you should have at least the same amount of swap space as you have RAM. If a UFS based system crashes it dumps the memory to swap, and at reboot it writes that data into /var/crash. You want to be sure swap and /var have enough space to hold that data. That data can be very valuable in addition to explorer logs when turning to Oracle for analysis on unexplained system crashes.

This explains it pretty well:
http://slacksite.com/solaris/crashdump.php

This all changes with ZFS root:
Managing Your ZFS Swap and Dump Devices - Oracle Solaris ZFS Administration Guide
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