# [OmniOS-discuss] Swap and dump

Olaf Marzocchi lists at marzocchi.net
Sat Aug 15 18:57:18 UTC 2015

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    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

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