[PC-BSD Testing] Swap and root partition sizes... wtf?
kris at pcbsd.org
Wed Aug 24 12:59:59 PDT 2011
On 08/24/2011 15:48, Bruce Cran wrote:
> On 24/08/2011 20:41, Kris Moore wrote:
>> On 08/24/2011 15:37, Bruce Cran wrote:
>>> On 24/08/2011 20:36, Jamie Ivanov wrote:
>>>> 2*mem was the rule of thumb 10 years ago. I've run bsd from 486's
>>>> to multi-core xeon servers, I have *never* used more than 1G swap.
>>>> Back in those 486 days the rule of thumb applied. But still, 9G of
>>>> swap? Its simple to incorporate your "rule of thumb" with a logical
>>>> limiter so nobody waste 9G on swap. With 4G of ram, I doubt swap
>>>> will ever be used, it hasn't yet.
>>> I have a machine with 16GB RAM and would be rather disappointed if I
>>> saw that 32GB of disk space was used for swap :)
>> What do you think the upper-limit should be on SWAP then? 2/4 or higher?
> I'd probably normally go higher, allocating 8GB even on a machine with
> 16GB RAM - but that may be more suitable for a server system than
> desktop - I know one reason to have 'plenty' of swap is to give people
> enough time to notice that the disk is thrashing and run to kill the
> errant process! At least at one time it was also recommended to have
> the same amount of swap as installed RAM in order to do crash dumps,
> but I think we do minidumps by default now?
That makes sense. I've added some caps to the defaults of 4GB for the
desktop, 8GB for server. Now let the bikeshed begin ;)
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