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Date:      Thu, 13 Feb 2020 19:07:21 +0300
From:      yp@mm.st
To:        freebsd-questions@freebsd.org
Subject:   Re: some questions about disk partitioning and filesystems and booting
Message-ID:  <1090523a-377c-9412-5db1-38e825e35956@mm.st>
In-Reply-To: <20200213155256.GD14144@bastion.zyxst.net>
References:  <20200213150229.GC14144@bastion.zyxst.net> <CAEJNuHxrVPfU_TB35AEXaq0QdM=p-v0rnuZWtmAgQdm_KRMNTw@mail.gmail.com> <20200213155256.GD14144@bastion.zyxst.net>

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tech-lists wrote:
[...]
>>> Doesn't swap need to be 2x RAM on a fast disk?
>>
>> No, this is really an old assumption.
> 
> OK, but doesn't it need to be at least the size of RAM if for example a 
> panic
> happens? I thought the contents of RAM were written to swap.

Now this is something I wanted to ask as well, as I didn't find anything 
really describing what needs to be done for large (not really so this 
days, 32 and higher) RAM systems -- I have a system with 64GB RAM and 
adding a 64GB swap partition makes system unhappy (I don't remember the 
exact message).  With minidumps and all, what size it should be so that 
dump is guaranteed to be saved?



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