On 05/ 4/11 07:30 AM, Dave Miner wrote:
On 05/ 3/11 05:15 PM, Jack Schwartz wrote:
...
478, 491: This may have already been discussed, and this may be better
handled as a follow-on bug, but it seems overly-simplistic to calculate
swap and dump to be 1/2 the RAM size. These days some systems have so
much RAM that they have little or no swap. And as systems with terabytes
of RAM will work their way into the world, do we need swap and dump that
are half the size of RAM?


These are heuristics that can be useful. dump size can need to be as large as physical memory, depending on how dumpadm is configured. If swap isn't going to add significantly to the available virtual memory, it's probably not that interesting to even bother.
In the past we (or maybe it is ZFS) had a more intelligent algorithm for calculating swap and dump. Just wondering why that isn't used? After all, if we're going to provide default swap and dump sizes we may as well provide some that are potentially more useful.

The right answer is for the user to configure what they need, but the nice thing here is that resizing these volumes after installation is easy, unlike the bad old days of VTOC slices and UFS.
True.  At least they can be changed after installation.

    Thanks,
    Jack

Dave

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