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What are your ARC statistics?

kspare

FreeNAS Experienced
Joined
Feb 19, 2015
Messages
266
  • Put your data type(s) here...
  • 10:35AM up 6 days, 3:23, 1 user, load averages: 0.70, 0.60, 0.57
  • 1.39TiB / 19.9TiB (ESXi)
  • 1.34GiB / 119GiB (freenas-boot)
  • 230.65GiB (MRU: 14.42GiB, MFU: 216.23GiB) / 256.00GiB
  • Hit ratio -> 91.84% (higher is better)
  • Prefetch -> 32.57% (higher is better)
  • Hit MFU:MRU -> 79.88%:17.82% (higher ratio is better)
  • Hit MRU Ghost -> 0.38% (lower is better)
  • Hit MFU Ghost -> 0.72% (lower is better)
 

kspare

FreeNAS Experienced
Joined
Feb 19, 2015
Messages
266
[*] 7:19AM up 7 days, 7 mins, 1 user, load averages: 0.41, 0.40, 0.33
[*]1.36TiB / 19.9TiB (ESXi)
[*]1.34GiB / 119GiB (freenas-boot)
[*]230.65GiB (MRU: 14.42GiB, MFU: 216.23GiB) / 256.00GiB
[*]Hit ratio -> 92.39% (higher is better)
[*]Prefetch -> 35.23% (higher is better)
[*]Hit MFU:MRU -> 80.57%:17.17% (higher ratio is better)
[*]Hit MRU Ghost -> 0.40% (lower is better)
[*]Hit MFU Ghost -> 0.66% (lower is better)

upload_2016-4-8_7-20-43.png
 

jgreco

Resident Grinch
Moderator
Joined
May 29, 2011
Messages
12,153
[*]1.36TiB / 19.9TiB (ESXi)
[*]230.65GiB (MRU: 14.42GiB, MFU: 216.23GiB) / 256.00GiB
Damn you. Makin' me want to go install that second NVMe SSD that'll take me to 1TB L2ARC. Your space utilization's lower too. That's pretty sweet overall, huh.

  • VM datastore
  • 5:53PM up 115 days, 20:39, 1 user, load averages: 0.01, 0.04, 0.01
  • 2.15TiB / 12.7TiB (storage3)
  • 119GiB / 460GiB (storage3-ssd)
  • 101.29GiB (MRU: 64.66GiB, MFU: 36.67GiB) / 128.00GiB
  • Hit ratio -> 93.23% (higher is better)
  • Prefetch -> 28.35% (higher is better)
  • Hit MFU:MRU -> 63.28%:35.20% (higher ratio is better)
  • Hit MRU Ghost -> 0.34% (lower is better)
  • Hit MFU Ghost -> 0.83% (lower is better)
 

kspare

FreeNAS Experienced
Joined
Feb 19, 2015
Messages
266
It's working pretty good. This is the box that hosts all our terminal servers and sql servers, there isn't much lag. 400gb intel 750 nvme for ZIL and 1.2tb for l2arc.
22 drives to make up 11 mirrored vdevs, 2 drives are set as online spares (even though you have to manually do the swap in the software) I took your suggestion and got the e5-1630v3 with 3.70 clock.

Seems to work pretty good, if you work it hard and saturate the 10gb card it will get to about 50-60% cpu...for the money it works perfect on average the cpu sits low because so much comes out of cache. I'm happy.

I'll post my stats as it keeps going up the longer it stays up.

upload_2016-4-8_7-52-38.png
 

hervon

FreeNAS Experienced
Joined
Apr 23, 2012
Messages
254
[*]Home server : Mostly backups and some media files
[*]10:31AM up 10 days, 16:12, 1 user, load averages: 0.19, 0.08, 0.07
[*]4.75TiB / 10.9TiB (NASHD)
[*]7.05GiB / 14.5GiB (freenas-boot)
[*]6.17GiB (MRU: 4.20GiB, MFU: 1.97GiB) / 16.00GiB
[*]Hit ratio -> 96.46% (higher is better)
[*]Prefetch -> 38.33% (higher is better)
[*]Hit MFU:MRU -> 97.65%:1.79% (higher ratio is better)
[*]Hit MRU Ghost -> 0.08% (lower is better)
[*]Hit MFU Ghost -> 0.13% (lower is better)

Works flawlessly.
 

kspare

FreeNAS Experienced
Joined
Feb 19, 2015
Messages
266
[*]11:04AM up 10 days, 3:52, 1 user, load averages: 0.54, 0.75, 0.74
[*]1.38TiB / 19.9TiB (ESXi)
[*]1.34GiB / 119GiB (freenas-boot)
[*]230.65GiB (MRU: 28.80GiB, MFU: 201.84GiB) / 256.00GiB
[*]Hit ratio -> 93.29% (higher is better)
[*]Prefetch -> 41.13% (higher is better)
[*]Hit MFU:MRU -> 82.44%:15.47% (higher ratio is better)
[*]Hit MRU Ghost -> 0.44% (lower is better)
[*]Hit MFU Ghost -> 0.55% (lower is better)
 

kspare

FreeNAS Experienced
Joined
Feb 19, 2015
Messages
266
[*] 2:19PM up 12 days, 7:07, 1 user, load averages: 0.83, 0.43, 0.50
[*]1.43TiB / 19.9TiB (ESXi)
[*]1.34GiB / 119GiB (freenas-boot)
[*]230.65GiB (MRU: 37.40GiB, MFU: 193.25GiB) / 256.00GiB
[*]Hit ratio -> 92.91% (higher is better)
[*]Prefetch -> 38.46% (higher is better)
[*]Hit MFU:MRU -> 82.22%:15.74% (higher ratio is better)
[*]Hit MRU Ghost -> 0.52% (lower is better)
[*]Hit MFU Ghost -> 0.51% (lower is better)

some changes in the numbers....
 

xhoy

Newbie
Joined
Apr 25, 2014
Messages
39
  • 25 vm's (50/50 linux/windows(50/50 server/desktop)
  • 11:32AM up 241 days, 20:13, 1 user, load averages: 0.02, 0.03, 0.00
  • 7.43TiB / 10.9TiB (SIJN-ZFS01)
  • 520MiB / 29.2GiB (freenas-boot)
  • 23.15GiB (MRU: 19.74GiB, MFU: 3.41GiB) / 32.00GiB
  • Hit ratio -> 84.75% (higher is better)
  • Prefetch -> 49.17% (higher is better)
  • Hit MFU:MRU -> 69.68%:24.18% (higher ratio is better)
  • Hit MRU Ghost -> 0.20% (lower is better)
  • Hit MFU Ghost -> 0.73% (lower is better)
 

Jacopx

FreeNAS Experienced
Joined
Feb 19, 2016
Messages
350
  • Data, Video, Photos, T.M. Backups
  • 3:35PM up 1 day, 5:44, 1 user, load averages: 0.40, 0.43, 0.30
  • 1.63GiB / 460GiB (Maxtor)
  • 730GiB / 2.72TiB (WDVolume_A)
  • 1.19TiB / 2.72TiB (WDVolume_B)
  • 2.31GiB / 28.8GiB (freenas-boot)
  • 2.59GiB (MRU: 840.33MiB, MFU: 1.78GiB) / 4.00GiB
  • Hit ratio -> 97.41% (higher is better)
  • Prefetch -> (higher is better)
  • Hit MFU:MRU -> 98.01%:1.96% (higher ratio is better)
  • Hit MRU Ghost -> 0.01% (lower is better)
  • Hit MFU Ghost -> 0.07% (lower is better)

My prefetch is (Nan) because i have less than 8gb of RAM, right? :)
 
Joined
Apr 22, 2016
Messages
1
  • Media and BackUps
  • 6:01PM up 6 days, 2:12, 1 user, load averages: 0.35, 0.27, 0.47
  • 11.0TiB / 13.6TiB (FunSpace)
  • 35.2GiB / 220GiB (System)
  • 5.17GiB / 14.5GiB (freenas-boot)
  • 11.59GiB (MRU: 10.64GiB, MFU: 975.38MiB) / 16.00GiB
  • Hit ratio -> 82.73% (higher is better)
  • Prefetch -> 70.57% (higher is better)
  • Hit MFU:MRU -> 93.15%:3.83% (higher ratio is better)
  • Hit MRU Ghost -> 0.08% (lower is better)
  • Hit MFU Ghost -> 0.30% (lower is better)
 
Joined
Apr 26, 2016
Messages
1
[media and backup]
[*]12:27PM up 18:06, 1 user, load averages: 0.25, 0.21, 0.14
[*]184GiB / 1.81TiB (backup)
[*]1.01GiB / 28.5GiB (freenas-boot)
[*]6.73GiB (MRU: 3.79GiB, MFU: 2.95GiB) / 8.00GiB
[*]Hit ratio -> 99.00% (higher is better)
[*]Prefetch -> 51.21% (higher is better)
[*]Hit MFU:MRU -> 98.31%:1.62% (higher ratio is better)
[*]Hit MRU Ghost -> 0.00% (lower is better)
[*]Hit MFU Ghost -> 0.09% (lower is better)
 
Joined
Jan 5, 2015
Messages
9
[*]Video/Photo/Backup
[*]12:46PM up 2 days, 3:31, 1 user, load averages: 1.16, 1.26, 1.29
[*]12.6TiB / 14.5TiB (Media) [encrypted]
[*]3.95GiB / 14.9GiB (freenas-boot)
[*]22.48GiB (MRU: 20.12GiB, MFU: 2.40GiB) / 32.00GiB
[*]Hit ratio -> 99.83% (higher is better)
[*]Prefetch -> 78.56% (higher is better)
[*]Hit MFU:MRU -> 99.84%:0.11% (higher ratio is better)
[*]Hit MRU Ghost -> 0.01% (lower is better)
[*]Hit MFU Ghost -> 0.01% (lower is better)
 
Joined
Nov 27, 2013
Messages
3
[*]Archive, media, VMs.
[*]12:57 up 1 day, 13:50, 2 users, load averages: 0,35 0,38 0,36
[*]131GiB / 1,81TiB (active)
[*]1,22TiB / 4,53TiB (archive)
[*]1,68TiB / 7,25TiB (data)
[*]813MiB / 14,4GiB (freenas-boot)
[*]1,42TiB / 2,72TiB (media)
[*]12.20GiB (MRU: 7.64GiB, MFU: 4.60GiB) / 16.00GiB
[*]Hit ratio -> 95.96% (higher is better)
[*]Prefetch -> 91.27% (higher is better)
[*]Hit MFU:MRU -> 91.86%:5.49% (higher ratio is better)
[*]Hit MRU Ghost -> 0.01% (lower is better)
[*]Hit MFU Ghost -> 0.07% (lower is better)
 
Joined
May 10, 2012
Messages
1
  • Workstation backups, VMs, repos, various network shares for documents
  • 1:52PM up 144 days, 13:28, 1 user, load averages: 1.15, 1.18, 1.20
  • 6.01GiB / 14.4GiB (freenas-boot)
  • 7.71TiB / 16.2TiB (storage)
  • 64.63GiB (MRU: 17.45GiB, MFU: 47.21GiB) / 96.00GiB
  • Hit ratio -> 90.41% (higher is better)
  • Prefetch -> 25.46% (higher is better)
  • Hit MFU:MRU -> 84.15%:3.01% (higher ratio is better)
  • Hit MRU Ghost -> 0.28% (lower is better)
  • Hit MFU Ghost -> 0.62% (lower is better)
 

m3ki

FreeNAS Experienced
Joined
Jun 20, 2016
Messages
108
Mine sucks I don't know how to fix this :(

  • Backups and Plex Media
  • 2:50PM up 4 days, 1:53, 1 user, load averages: 0.31, 0.27, 0.26
  • 1.48GiB / 14.9GiB (freenas-boot)
  • 192GiB / 460GiB (zfast)
  • 51.6TiB / 109TiB (zroot)
  • 26.51GiB (MRU: 16.89GiB, MFU: 9.66GiB) / 32.00GiB
  • Hit ratio -> 63.86% (higher is better)
  • Prefetch -> 48.72% (higher is better)
  • Hit MFU:MRU -> 87.55%:9.62% (higher ratio is better)
  • Hit MRU Ghost -> 0.10% (lower is better)
  • Hit MFU Ghost -> 0.07% (lower is better)
 

ovizii

FreeNAS Experienced
Joined
Jun 30, 2014
Messages
432
seem to be having some trouble with the script, output looks like this:

  • Put your data type(s) here...
  • 8:34PM up 3 days, 8:25, 2 users, load averages: 0.48, 0.71, 0.65
  • 8.24TiB / 13.6TiB (fiver)
  • 6.81GiB / 28.6GiB (freenas-boot)
    usage: awk [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]
    ./arc-info.sh: {print $6 $7}: not found
    usage: awk [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]
    ./arc-info.sh: {print $5}: not found
  • 11.47GiB (MRU: Recently Used Cache Size: 27.01% 3.10 GiB, MFU: ) / 16.00GiB
  • Hit ratio -> 96.23% (higher is better)
  • Prefetch -> Data Prefetch Efficiency: 31.04% 51.72k (higher is better)
  • Hit MFU:MRU -> Most Frequently Used: 98.20% 149.91m:1.58% (higher ratio is better)
  • Hit MRU Ghost -> Most Recently Used Ghost: 0.00% 2.78k (lower is better)
  • Hit MFU Ghost -> (lower is better)
 

Bidule0hm

Server Electronics Sorcerer
Joined
Aug 5, 2013
Messages
3,710
Looks like broken lines in the script. Can you post the output of cat -e your_script.sh on the other thread or in PM so we can keep this one clean please?
 

ovizii

FreeNAS Experienced
Joined
Jun 30, 2014
Messages
432
Weird, I went and copy/pasted from pastebin again and now it works as expected :-(

  • Put your data type(s) here...
  • 8:28AM up 3 days, 20:18, 2 users, load averages: 0.42, 0.48, 0.55
  • 8.24TiB / 13.6TiB (fiver)
  • 6.81GiB / 28.6GiB (freenas-boot)
  • 11.73GiB (MRU: 1.34GiB, MFU: 10.41GiB) / 16.00GiB
  • Hit ratio -> 95.67% (higher is better)
  • Prefetch -> 23.15% (higher is better)
  • Hit MFU:MRU -> 98.15%:1.57% (higher ratio is better)
  • Hit MRU Ghost -> 0.04% (lower is better)
  • Hit MFU Ghost -> 0.19% (lower is better)
 

Bidule0hm

Server Electronics Sorcerer
Joined
Aug 5, 2013
Messages
3,710
Probably the first time you've done the copy-paste the window was too small so some lines have been wrapped :)
 
Last edited:
Joined
Aug 13, 2016
Messages
2
I thought I'd post stats from my system here.
It's a new setup and I'm mostly just dumping data into it for now.
I also have more ram on the way so I'll post an updated stats after I've added ram.


  • Media
  • 12:24AM up 1 day, 5 mins, 1 user, load averages: 2.00, 2.13, 2.13
  • 653MiB / 7.94GiB (freenas-boot)
  • 9.44TiB / 65TiB (tank)
  • 20.77GiB (MRU: 19.43GiB, MFU: 1.35GiB) / 24.00GiB
  • Hit ratio -> 66.25% (higher is better)
  • Prefetch -> 33.18% (higher is better)
  • Hit MFU:MRU -> 51.17%:31.65% (higher ratio is better)
  • Hit MRU Ghost -> 0.93% (lower is better)
  • Hit MFU Ghost -> 1.60% (lower is better)
 
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