The system "saves" a few resources for root on the console,
like a few process slots, etc. And since the text area (execution) is shared, the shell will be in mem.
So sometimes one can login as root (on the console, no su) and issue 1 command. Make it a good one!
You could ether stop processes consuming swapspace (hard to find out, when you can't run many commands) or add some swap with the commands (not sure if these commands will work)
mkfile size /swapfile
swap -a /swapfile
Best Regards, Franz
--
Solaris System Manager from Munich, Germany
I used to work for Sun Microsystems Support (EMEA) for 5 years in the domain of the OS, Backup and Storage
Not much you can do, unless you know who's on the system and running what and can kick them off. However you need to make sure it doesn't reoccur and when system is rebooted check your /var/adm/messages,
check /tmp and swap -s
run "vmstat 2 10"
If it looks like swap is low then you can dynamically add using spare diskspace as daFranz recommends
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