[OmniOS-discuss] Swap and dump

[Olaf Marzocchi]

Hello,
over two years ago I installed my OmniOS server and after the install I 
found a 16 GB dump dataset and a 4 GB swap dataset. I have 32 GB RAM. My 
root disk is 30 GB, you can feel my pain :)

I don't remember ever changing them, but now I was investigating the 
matter after for the second time in two years the automatic updates 
(that I set) filled the root disk, and I found:

       Dump content: kernel pages
        Dump device: none (dumps disabled)
Savecore directory: /var/crash/OmniOS-Xeon
   Savecore enabled: yes
    Save compressed: on

Dumps are disabled. Do I need that dataset anymore?

I don't understand (from the man page) how savecores can be working, 
when they are taken at the reboot after a crash and when they rely on a 
dump, that is not being taken.

I reduced the dump dataset to 8 GB that should be enough for the kernel 
pages, but if I really don't need one to get the savecores (not that I 
ever had crashes in the last 18 months anyway) I will remove it altogether.

Could you clarify me how this works and at what time the dumps got 
disabled automatically?

Thanks
Olaf