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What are your ARC statistics?

Joined
Nov 28, 2016
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I'm being thick...but what do I put in the ""[*]Put your data type(s) here..."" section?

Can someone give me an example?
 
Joined
Nov 28, 2016
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oh wait I really was being thick.....it literally just echo's this back to you so you can just put what ever you like.



Here are my stats - only 32GB of RAM installed right now, 128 GB to be installed today.

Not sure why it's not picking up any stats...thoughts?


  • Put your data type(s) here...
  • 10:45AM up 4 days, 13:08, 1 user, load averages: 0.11, 0.08, 0.09
  • 680MiB / 28.5GiB (freenas-boot)
  • 1.10TiB / 4.34TiB (vm-store-1)
  • (MRU: , MFU: ) /
  • Hit ratio -> (higher is better)
  • Prefetch -> (higher is better)
  • Hit MFU:MRU -> : (higher ratio is better)
  • Hit MRU Ghost -> (lower is better)
  • Hit MFU Ghost -> (lower is better)
 
Joined
Nov 28, 2016
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Me being thick again, not the entire script was copied over - here are the new stats:

  • Put your data type(s) here...
  • 10:50AM up 4 days, 13:13, 1 user, load averages: 0.05, 0.09, 0.09
  • 680MiB / 28.5GiB (freenas-boot)
  • 1.09TiB / 4.34TiB (vm-store-1)
  • 22.71GiB (MRU: 24.62GiB, MFU: 636.60MiB) / 32.00GiB
  • Hit ratio -> 64.19% (higher is better)
  • Prefetch -> 2.04% (higher is better)
  • Hit MFU:MRU -> 21.25%:77.79% (higher ratio is better)
  • Hit MRU Ghost -> 0.06% (lower is better)
  • Hit MFU Ghost -> 1.20% (lower is better)
 
Joined
Nov 28, 2016
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Okay after shutting down freenas, putting in 128GB of ram, and then booting it back up and copying over a load of VMs, here are the stats!

I expect it to get better over the next few days.


  • Put your data type(s) here...
  • 6:22PM up 31 mins, 1 user, load averages: 1.81, 2.19, 1.66
  • 680MiB / 28.5GiB (freenas-boot)
  • 1.12TiB / 4.34TiB (vm-store-1)
  • 105.39GiB (MRU: 102.51GiB, MFU: 2.88GiB) / 128.00GiB
  • Hit ratio -> 48.21% (higher is better)
  • Prefetch -> 31.78% (higher is better)
  • Hit MFU:MRU -> 67.68%:31.25% (higher ratio is better)
  • Hit MRU Ghost -> 0.01% (lower is better)
  • Hit MFU Ghost -> 0.00% (lower is better)
 
Joined
Nov 28, 2016
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Just under a day of up-time and here's where I'm at.
  • General VM store for about 80 VMs in ESXI
  • 12:17PM up 18:26, 2 users, load averages: 0.06, 0.05, 0.06
  • 680MiB / 28.5GiB (freenas-boot)
  • 1.12TiB / 4.34TiB (vm-store-1)
  • 88.47GiB (MRU: 79.96GiB, MFU: 21.72GiB) / 128.00GiB
  • Hit ratio -> 89.18% (higher is better)
  • Prefetch -> 49.90% (higher is better)
  • Hit MFU:MRU -> 71.28%:22.42% (higher ratio is better)
  • Hit MRU Ghost -> 0.00% (lower is better)
  • Hit MFU Ghost -> 0.05% (lower is better)
 
Joined
Nov 28, 2016
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at 3 days of uptime with same workload:

  • Put your data type(s) here...
  • 4:51PM up 2 days, 23 hrs, 2 users, load averages: 0.08, 0.07, 0.02
  • 681MiB / 28.5GiB (freenas-boot)
  • 1.13TiB / 4.34TiB (vm-store-1)
  • 104.21GiB (MRU: 98.17GiB, MFU: 9.09GiB) / 128.00GiB
  • Hit ratio -> 72.41% (higher is better)
  • Prefetch -> 19.72% (higher is better)
  • Hit MFU:MRU -> 43.75%:49.57% (higher ratio is better)
  • Hit MRU Ghost -> 0.32% (lower is better)
  • Hit MFU Ghost -> 1.21% (lower is better)


Interesting its getting "worse".
 
Joined
Nov 28, 2016
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28 days uptime....




  • Virtual Machine Storage
  • 9:16AM up 28 days, 15:25, 1 user, load averages: 0.13, 0.06, 0.06
  • 685MiB / 28.5GiB (freenas-boot)
  • 745GiB / 4.34TiB (vm-store-1)
  • 98.85GiB (MRU: 91.31GiB, MFU: 13.08GiB) / 128.00GiB
  • Hit ratio -> 62.63% (higher is better)
  • Prefetch -> 11.42% (higher is better)
  • Hit MFU:MRU -> 26.36%:67.89% (higher ratio is better)
  • Hit MRU Ghost -> 1.29% (lower is better)
  • Hit MFU Ghost -> 6.04% (lower is better)
 
Joined
Nov 28, 2016
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Same data set but with Dedup turned on....



  • Virtual Machine Storage
  • 9:14AM up 33 days, 15:23, 1 user, load averages: 0.53, 0.35, 0.34
  • 690MiB / 28.5GiB (freenas-boot)
  • 291GiB / 4.34TiB (vm-store-1)
  • 101.65GiB (MRU: 67.81GiB, MFU: 34.98GiB) / 128.00GiB
  • Hit ratio -> 70.18% (higher is better)
  • Prefetch -> 11.23% (higher is better)
  • Hit MFU:MRU -> 35.31%:55.52% (higher ratio is better)
  • Hit MRU Ghost -> 0.95% (lower is better)
  • Hit MFU Ghost -> 3.95% (lower is better)
 
Joined
Jun 19, 2017
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I am realy concern about my result. Am i right, that result is so bad because i have pretty big pool and only 16GiB of memory? L2ARC is 80GiB SSD.


[*] Media data
[*] 5:15PM up 139 days, 23:52, 1 user, load averages: 0.05, 0.04, 0.05
[*]1023MiB / 74.5GiB (freenas-boot)
[*]18.5TiB / 29TiB (tank)
[*]50.70GiB (MRU: 4.40GiB, MFU: 46.30GiB) / 16.00GiB
[*]Hit ratio -> 28.99% (higher is better)
[*]Prefetch -> 17.65% (higher is better)
[*]Hit MFU:MRU -> 22.08%:39.90% (higher ratio is better)
[*]Hit MRU Ghost -> 79.64% (lower is better)
[*]Hit MFU Ghost -> 14.30% (lower is better)
 

MrToddsFriends

Documentation Browser
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Joined
Jan 6, 2017
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Does this work on 11 ?
Only getting 1 row:

time read miss miss% dmis dm% pmis pm% mmis mm% arcsz c
16:17:26 0 0 0 0 0 0 0 0 0 10G 10G

 

RoboKaren

FreeNAS Experienced
Joined
Apr 8, 2014
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rogerh

FreeNAS Guru
Joined
Apr 18, 2014
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You didn't get the memo that turning DEDUP ON is generally a bad idea?
His system seems to meet the criteria for making it work, though.
 

Scharbag

FreeNAS Experienced
Joined
Feb 1, 2012
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My stats since running on a much less powerful system:

  • Movies, Data, VMs shared over NFS to ESXi
  • 11:34AM up 7 days, 23:58, 1 user, load averages: 0.26, 0.36, 0.45
  • 25.9TiB / 32.5TiB (backuptank)
  • 28.7TiB / 43.5TiB (bigtank)
  • 144GiB / 444GiB (fasttank)
  • 3.95GiB / 15.9GiB (freenas-boot)
  • 11.07GiB (MRU: 8.91GiB, MFU: 2.19GiB) / 24.00GiB
  • Hit ratio -> 28.90% (higher is better)
  • Prefetch -> 43.12% (higher is better)
  • Hit MFU:MRU -> 40.17%:23.92% (higher ratio is better)
  • Hit MRU Ghost -> 0.87% (lower is better)
  • Hit MFU Ghost -> 1.86% (lower is better)

Really would like to take the plunge and get a 64GB capable system...

OR grab a set and give the new version a chance and get rid of ESXI. But that is a TON of work to get my VMs transferred across...

Cheers,
 

Hazimil

FreeNAS Experienced
Joined
May 26, 2014
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  • DVD/Blu-Ray Rips, User Data, MP3s, server currently in TEST mode, not live yet!
  • 9:38AM up 20:21, 1 users, load averages: 0.01, 0.04, 0.06
  • 513GiB / 58TiB (Tank)
  • 993MiB / 111GiB (freenas-boot)
  • 115.75GiB (MRU: 115.79GiB, MFU: 267.14MiB) / 128.00GiB
  • Hit ratio -> 68.06% (higher is better)
  • Prefetch -> 96.30% (higher is better)
  • Hit MFU:MRU -> 53.13%:43.21% (higher ratio is better)
  • Hit MRU Ghost -> 0.00% (lower is better)
  • Hit MFU Ghost -> 2.61% (lower is better)
 
Joined
Jun 14, 2017
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Mine doesnt work and it saddens me dearly....

root@ultron:/mnt/tank/HOME/test-scripts # ./ARCstats

  • Put your data type(s) here...
  • 3:12AM up 7 days, 18:58, 1 users, load averages: 0.29, 0.19, 0.11
  • 2.88GiB / 14.9GiB (freenas-boot)
  • 510GiB / 14.5TiB (tank)
  • 11.0TiB / 29TiB (tanktwo)
    usage: awk [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]
    ./ARCstats: {print $6 $7}: not found
    usage: awk [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]
    ./ARCstats: {print $4}: not found
    usage: awk [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]
    ./ARCstats: {print $4}: not found
    usage: awk [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]
    ./ARCstats: {print $4}: not found
    usage: awk [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]
    ./ARCstats: {print $5}: not found
  • 26.69 (MRU: , MFU: 8.19GiB) / 32.00
  • Hit ratio -> Cache Hit Ratio: 70.39% 53.43m (higher i s better)
  • Prefetch -> (higher is better)
  • Hit MFU:MRU -> : (higher ratio is better)
  • Hit MRU Ghost -> (lower is better)
  • Hit MFU Ghost -> 2.05% (lower is better)
 
Joined
Mar 25, 2017
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  • ESXi Datastore (5 VMs)
  • 1:35PM up 19 days, 23:41, 1 users, load averages: 0.32, 0.33, 0.29
  • 3.00GiB / 111GiB (freenas-boot)
  • 1.10TiB / 18.1TiB (savage)
  • 34.27GiB (MRU: 29.49GiB, MFU: 4.84GiB) / 40.00GiB
  • Hit ratio -> 94.26% (higher is better)
  • Prefetch -> 93.44% (higher is better)
  • Hit MFU:MRU -> 56.43%:37.74% (higher ratio is better)
  • Hit MRU Ghost -> 0.04% (lower is better)
  • Hit MFU Ghost -> 0.13% (lower is better)
 
Joined
Dec 21, 2017
Messages
5
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1
  • Movies, Timemachine backups
  • 10:04PM up 8 days, 51 mins, 0 users, load averages: 0.55, 0.47, 0.45
  • 891GiB / 4.54TiB (data)
  • 3.24GiB / 28.2GiB (freenas-boot)
  • 8.30GiB (MRU: 5.47GiB, MFU: 2.83GiB) / 32.00GiB
  • Hit ratio -> 66.23% (higher is better)
  • Prefetch -> 27.36% (higher is better)
  • Hit MFU:MRU -> 59.74%:33.95% (higher ratio is better)
  • Hit MRU Ghost -> 0.78% (lower is better)
  • Hit MFU Ghost -> 1.88% (lower is better)
 
Joined
Jan 9, 2012
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27
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3
  • Media Storage(HomeStorage) with 4 X 3TB RaidZ1 Test is 4 X 120GB SSD raidZ1
  • 9:48PM up 14 days, 4:10, 1 user, load averages: 0.51, 0.62, 0.56
  • 5.98TiB / 10.9TiB (HomeStorage)
  • 4.66GiB / 436GiB (Test)
  • 4.45GiB / 7.06GiB (freenas-boot)
  • 9.67GiB (MRU: 5.64GiB, MFU: 4.15GiB) / 16.00GiB
  • Hit ratio -> 64.47% (higher is better)
  • Prefetch -> 22.76% (higher is better)
  • Hit MFU:MRU -> 89.36%:8.57% (higher ratio is better)
  • Hit MRU Ghost -> 0.13% (lower is better)
  • Hit MFU Ghost -> 0.55% (lower is better)
 
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