Re: Swap

I have never monitored my RAM usage. I have been allocating RAM Size x 2
until now for all my systems.
On 04-Feb-2016 9:32 PM, "Matus UHLAR - fantomas" <[email protected]> wrote:

> On 04.02.16 21:12, Jos Collin wrote:
>
>> How much swap space does 4GB ram ideally requires ? I have been using the
>> rule "RAM size x 2" for calculating the size of swap. But as the RAM sizes
>> are bigger nowadays, is this a wrong calculation ?
>>
>
> yes.
>
>> I mean, is it okay if I
>> use 1 GB of swap space (or lesser) for a 4gb RAM ?
>>
>
> it highly depends on your usual needs and how much of RAM you use in peaks.
> I run without swap on many machines for some years already.
> Do you monitor your RAM usage?
>
> on some servers I use 3GiB, with the only reason for having swap is to
> notice system slowdown when it starts swapping.
> You can try e.g. enable zswap so kernel will use the 1GB swap even more
> effectively.
>
> Similarly you can reserve some memory for zram block device and swap to it.
>
>
> Another trick is to use swap and mount /tmp on tmpfs (which means, on
> virtual memory), although some people discourage this because (some) people
> or applications tend to fill /tmp with bloat.
> ...you can avoid this problem by limiting tmpfs size
>
>
> --
> Matus UHLAR - fantomas, [email protected] ; http://www.fantomas.sk/
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