FreeNAS uses only 8 Gb ram

[Dhy1]

Hi, my pc (fx 8370, 16 gb RAM, 4 TB hdd, 60 Gb ssd) has freenas and uses 8 GB of RAM (also using other ram the same thing happens). The bios is updated and sees 16 gb and also the memTest says that all is well. Do you know how it can manage to use all my 16 GB of ram?

[root@DhimmiServer ~]# dmesg | grep memory
real memory = 17179869184 (16384 MB)
avail memory = 8194711552 (7815 MB)

[root@DhimmiServer ~]# uname -a
FreeBSD DhimmiServer.local 11.2-STABLE FreeBSD 11.2-STABLE #0 r325575+9a3c7d8b53f(HEAD): Wed Mar 27 12:41:58 EDT 2019 root@mp20.tn.ixsystems.com:/freenas-releng/freenas/_BE/objs/freenas-releng/freenas/_BE/os/sys/FreeNAS.amd64 amd64

 

[PhiloEpisteme]

Hi. I don't have a solution for your issue but I do have a suggest to help you get better answers. First, please include the code in code blocks. It helps improve readability. Also, please take a look at the Forum Rules. It would help if you clearly state your specific hardware including exact model numbers. I suggest you edit your first post with as much information as you can include. Probably worth throwing in BIOS if you're having memory issues. Taking those steps above greatly increases the likelihood more folks will respond. Take a look at my signature for an example of specific hardware descriptions.

 

[Apollo]

How do you use your system?
Do you use it to store files via SMB? If you have pictures or video, then play from the shared drive or copy from your Freenas box to your PC. As the data will get accessed by ZFS, it will slowly consume the available RAM up to almost the maximum.

 

[wblock]

[root@DhimmiServer ~]# dmesg | grep memory
real memory = 17179869184 (16384 MB)
avail memory = 8194711552 (7815 MB)

That is not memory used, but detected memory at boot. It is common for some of the total memory installed to be used by motherboard resources. It is not common for over half to be used up that way. Could be a hardware configuration problem, or maybe even bad memory that is detected but then locked out. Hard to say with so little information.

Actual memory usage can be seen with Display System Processes from the menu, which is the output of top(1) from the command line.

 

[sretalla]

Did you turn on autotune?

It's possible that you have set limits based on 8GB with autotune and it will not change those settings.

 

[Dhy1]

Did you turn on autotune?

It's possible that you have set limits based on 8GB with autotune and it will not change those settings.

Where can I find this setting?

 

[Dhy1]

Where can I find this setting?

I found it .. the autotune is off

 

[Redcoat]

Where can I find this setting?

System, Advanced. See the manual section 6.4.1. https://ixsystems.com/documentation...nningversion=FreeNAS-11.2-RELEASE-U1#autotune

 

[Dhy1]

System, Advanced. See the manual section 6.4.1. https://ixsystems.com/documentation...nningversion=FreeNAS-11.2-RELEASE-U1#autotune

I found it .. the autotune is off

 

[Redcoat]

And nothing in System, Tunables?

 

[Dhy1]

 

[Redcoat]

No - in System, Tunables:

 

[Dhy1]

No - in System, Tunables:

View attachment 30197

sorry I did not understand . yes, I have many

 

[droeders]

It's probably worth booting a recent Linux distribution and see if it has the same problem.

 

[HoneyBadger]

Your ARC is capped at 5GB which is way too low for a 16GB system.

Do you have a bunch of jails/plugins running? On a freshly booted 16GB system I have this:

Code:

root@freenas:~ # dmesg | grep memory
real memory  = 18253611008 (17408 MB)
avail memory = 16571641856 (15803 MB)

 

[SweetAndLow]

sorry I did not understand . yes, I have many

Did you want those tunables? If you don't know what they are delete all of them. Most systems don't have any.

 

[Dhy1]

Your ARC is capped at 5GB which is way too low for a 16GB system.

Do you have a bunch of jails/plugins running? On a freshly booted 16GB system I have this:

Code:

root@freenas:~ # dmesg | grep memory
real memory  = 18253611008 (17408 MB)
avail memory = 16571641856 (15803 MB)

I have 4 plugins active they don't seem to me much . how can i increase the ARC? so as to use all 16 gb

 

[Dhy1]

Did you want those tunables? If you don't know what they are delete all of them. Most systems don't have any.

No I didn't want them. I didn't put them in. Yes they are put automatically, can I delete it? Will my problem be solved?

 

[SweetAndLow]

No I didn't want them. I didn't put them in. Yes they are put automatically, can I delete it? Will my problem be solved?

Yeah delete them, they got put in when you enabled auto tune. You probably shouldn't have done that.

 

[Dhy1]

Yeah delete them, they got put in when you enabled auto tune. You probably shouldn't have done that.

Are you sure it won't do damage by eliminating them?