FREENAS-MIB :: zfsArcSize

MIB Reference — IPNetwork Monitor · Updated October 05, 2026

All MIBs › FREENAS-MIB › zfsArcSize

zfsArcSize

Module: FREENAS-MIB

OID (symbolic): FREENAS-MIB::zfsArcSize

OID (numeric): 1.3.6.1.4.1.50536.1.4.1

Node type: OBJECT-TYPE

Type: Gauge32

Access: read-only

What is zfsArcSize?

The current total size of the ZFS Adaptive Replacement Cache (ARC), the in-memory read cache that keeps frequently used disk blocks in RAM to speed up reads.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.50536.1.4.1
snmpwalk -v2c -c public <target> FREENAS-MIB::zfsArcSize

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.50536.1.4.1.1
snmpget -v2c -c public <target> FREENAS-MIB::zfsArcSize.1

Start monitoring FreeNAS/TrueNAS ZFS storage appliance/server with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the FREENAS-MIB::zfsArcSize OID value, configure state conditions and alerts, and monitor any FreeNAS/TrueNAS ZFS storage appliance/server from a single console.

OID Breakdown

Upper-level ancestors (6 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
Numeric OIDNameModule
1.3.6.1.4.1.50536freeNasFREENAS-MIB
1.3.6.1.4.1.50536.1zfsFREENAS-MIB
1.3.6.1.4.1.50536.1.4arcFREENAS-MIB
1.3.6.1.4.1.50536.1.4.1zfsArcSizeFREENAS-MIB