How to use tunables and some advice please.

[image132]

Hey all.

So I'm a n00b at freenas. I'm running 4X2TB HDD in RAIDZ and getting pretty bad speeds. So I did some reading and found some zfs tunables. I was just wondering how tunables work and what value goes where.

For instance I found this tunable vfs.zfs.txg.timeout="5" and how do I input that into freenas? I mean what goes into the variable, value and comment sections?

I read some stuff about changing the vm_kmem_size depending on your system but that with 64bit and freenas 8 they should be stable. Should I change it, if so what should they be?

My specs are:

CPU: Intel core 2 duo E6700 2.66Ghz
RAM: 2gig ddr2
HDD: 4X2TB in raidz
Using mobo sata controller.

Also are there any other tunables you could suggest for my system and their related values or should I just buy more ram?

Thanks in advance.

 

[ProtoSD]

Everyone wants the answers given to them on a silver platter, RTFM....

http://doc.freenas.org/index.php/Tunables

There are also several links to the docs/faqs etc. in my signature below...

 

[gpsguy]

From the hardware requirements, "ZFS typically requires a minimum of 6 GB of RAM in order to provide good performance".

or should I just buy more ram?

 

[survive]

Hi image132,

Yes, you should just buy more RAM.

Once you get up to the recommended minimum amount of RAM be sure you are using the 64bit version of FreeNAS.

-Will