Should I enable/disable memory compression?

[equinox]

My DS220+ running DSM7 with 18GB memory. Under Control panel->Hardware & Power, there is optional that given a option to enable memory compression (see the screenshot below).

Reading the article and seems that Synology recommended to enable the option. See Here

My question is shoud I enable it?

Thanks

-- post merged: 31. Aug 2021 --

Based on the article, I don't think I need to enable the option cause I have enough ram space.

 

[WST16]

Never bothered reading too much into it. I think I have it enabled. Didn’t they say it’s faster when enabled?

 

[equinox]

But if you have enough RAM, you should uncheck it. Memory compression is CPU-hungry.

If I don't remember wrong, you have the same amount of RAM as I have, 18GB.

 

[WST16]

I can turn it off and see if it changes anything. Why not.

 

[Robbie]

It's a setting for the older RAM-starved units. For everything else it could be labelled "Slow you NAS whilst working the CPU a bit harder".

 

[fredbert]

I can turn it off and see if it changes anything. Why not.

Whoa there! You'll reset your uptime back to zero days

 

[WST16]

You'll reset your uptime back to zero days

It doesn't matter anymore. Everything will reset to zero by the looks of it. There's no end in sight

 

[Jan Janowski]

I realize old thread.... But wanted to confirm.... for latest DSM (7.1--1)
This is enabled by default (At least, I didn't do it...)
All systems here Only have 6GB Ram, but, Ram use on each is 30% -- or less at times.... (Running Cache Advisor in bkgnd)

So Under 7.1-1 with the Ram Useage being 30% or less... Should I disable the memory compression... ????

Thanks for your post

 

[Robbie]

Yep, disable it.

 

[Jan Janowski]

Thanks.... I don't really see a difference in Ram usage... but only did 1 720+ so I could compare....
After a few minutes while I read this thread checked both again.... CPU may have fallen just a bit...

 

[Robbie]

@Jan Janowski
I'd be amazed if you did see a RAM difference with GB of RAM installed.

This feature exists due to the tiny amount of RAM installed in early Synology NASes - for the first few years 64 MB was typical and I think they only got to the dizzying height of 128 MB in 2010 ish. It's less than 18 months since they still had an 'enterprise' NAS with 512 MB of RAM. You are in a different league!

 

[infinidim]

I have a DS220j which doesn't have much memory , should I switch it on?

 

[WST16]

I realize old thread.... But wanted to confirm.... for latest DSM (7.1--1)
This is enabled by default (At least, I didn't do it...)
All systems here Only have 6GB Ram, but, Ram use on each is 30% -- or less at times.... (Running Cache Advisor in bkgnd)

So Under 7.1-1 with the Ram Useage being 30% or less... Should I disable the memory compression... ????

Thanks for your post

I’d say disable it and monitor the memory swap for a while if it’s zero or extremely low, you should be fine.

-- post merged: 1. May 2022 --

I have a DS220j which doesn't have much memory , should I switch it on?

Check memory swapping and if it’s excessive, try turning it on and compare.