Re: zram Usage as Default in Debian (?)
On 01/08/2012 02:43 PM, Chow Loong Jin wrote:
> On 08/01/2012 01:48, Rainer Dorsch wrote:
>
>> Hello,
>>
>> I recently setup zram (for compressed swap space in RAM) on an older low RAM
>> machine. I was quite happy with the result and started now to do the same
>> setup also on my other machines. I am wondering if anybody is investigating,
>> if debian should do that by default when installing a new machine or even
>> better also when machines get upgraded.
>> [...]
>>
> In my experience from using a zram + on-disk swap setup, performance is only
> good until the zram swap gets filled up. Then performance goes to hell because
> you'll be functioning primarily on your on-disk swap while your zram swap just
> acts as deadweight sitting around taking up memory. What I usually did at that
> point was to swapoff the zram swap to force everything into the on-disk swap,
> rmmod, and re-create the zram swap again to get free zram swap space.
>
> I don't think it's a good idea to make this default.
>
I and my ex-employee had similar experience. I also wouldn't recommend it.
Thomas
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