blckhm
Dabbler
- Joined
- Sep 24, 2018
- Messages
- 42
Hello everyone,
A few months ago, we transfered our all static contents to new freenas system which build on supermicro 6048.
Our specs are;
- Supermicro X10DRL-i
- Intel(R) Xeon(R) CPU E5-2630L v3 @ 1.80GHz
- DDR4 ECC 53207MB (cause we virtualized, actually 64gb)
- 10GbaseT network
- LSI3008 HBA
- 20x 8TB Seagate Archive HDD !!!BEWARE!!! SMR sucks! (we used only for backups)
- 4x 12TB WD Gold (serving static contents like jpeg, png, gif etc.)
+ 4 more 12TB drives on the way to expand the pool.
And our ZFS reports are;
When I read the charts, everything seems to be cached from ARC. And our hit ratio populated due Frequently Used pattern.
I think we don't need more memory capacity or any L2ARC under these loads, do I?
Our arc summary looks like that by the way;
A few months ago, we transfered our all static contents to new freenas system which build on supermicro 6048.
Our specs are;
- Supermicro X10DRL-i
- Intel(R) Xeon(R) CPU E5-2630L v3 @ 1.80GHz
- DDR4 ECC 53207MB (cause we virtualized, actually 64gb)
- 10GbaseT network
- LSI3008 HBA
- 20x 8TB Seagate Archive HDD !!!BEWARE!!! SMR sucks! (we used only for backups)
- 4x 12TB WD Gold (serving static contents like jpeg, png, gif etc.)
+ 4 more 12TB drives on the way to expand the pool.
And our ZFS reports are;
When I read the charts, everything seems to be cached from ARC. And our hit ratio populated due Frequently Used pattern.
I think we don't need more memory capacity or any L2ARC under these loads, do I?
Our arc summary looks like that by the way;
Code:
System Memory:
0.03% 15.95 MiB Active, 1.56% 809.18 MiB Inact
95.59% 48.41 GiB Wired, 0.00% 0 Bytes Cache
2.15% 1.09 GiB Free, 0.67% 346.41 MiB Gap
Real Installed: 56.00 GiB
Real Available: 92.79% 51.96 GiB
Real Managed: 97.46% 50.64 GiB
Logical Total: 56.00 GiB
Logical Used: 96.65% 54.12 GiB
Logical Free: 3.35% 1.88 GiB
Kernel Memory: 3.96 GiB
Data: 99.05% 3.92 GiB
Text: 0.95% 38.67 MiB
Kernel Memory Map: 50.64 GiB
Size: 22.08% 11.18 GiB
Free: 77.92% 39.46 GiB
Page: 1
------------------------------------------------------------------------
ARC Summary: (HEALTHY)
Storage pool Version: 5000
Filesystem Version: 5
Memory Throttle Count: 0
ARC Misc:
Deleted: 12.83m
Mutex Misses: 2.66k
Evict Skips: 2.66k
ARC Size: 77.78% 38.61 GiB
Target Size: (Adaptive) 77.73% 38.59 GiB
Min Size (Hard Limit): 12.50% 6.21 GiB
Max Size (High Water): 8:1 49.64 GiB
ARC Size Breakdown:
Recently Used Cache Size: 40.78% 15.75 GiB
Frequently Used Cache Size: 59.22% 22.87 GiB
ARC Hash Breakdown:
Elements Max: 2.36m
Elements Current: 72.84% 1.72m
Collisions: 4.58m
Chain Max: 6
Chains: 154.29k
Page: 2
------------------------------------------------------------------------
ARC Total accesses: 833.83m
Cache Hit Ratio: 97.58% 813.62m
Cache Miss Ratio: 2.42% 20.21m
Actual Hit Ratio: 97.54% 813.30m
Data Demand Efficiency: 82.23% 13.89m
Data Prefetch Efficiency: 16.98% 7.32m
CACHE HITS BY CACHE LIST:
Most Recently Used: 3.12% 25.37m
Most Frequently Used: 96.84% 787.93m
Most Recently Used Ghost: 0.19% 1.52m
Most Frequently Used Ghost: 0.07% 609.25k
CACHE HITS BY DATA TYPE:
Demand Data: 1.40% 11.42m
Prefetch Data: 0.15% 1.24m
Demand Metadata: 98.44% 800.91m
Prefetch Metadata: 0.01% 42.24k
CACHE MISSES BY DATA TYPE:
Demand Data: 12.22% 2.47m
Prefetch Data: 30.07% 6.08m
Demand Metadata: 46.97% 9.49m
Prefetch Metadata: 10.75% 2.17m
Page: 3
------------------------------------------------------------------------
Page: 4
------------------------------------------------------------------------
DMU Prefetch Efficiency: 200.34m
Hit Ratio: 5.03% 10.07m
Miss Ratio: 94.97% 190.27m
Page: 5
------------------------------------------------------------------------
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