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vy32
Asked: 2019-09-06 13:02:53 +0800 CST

measuring total swap with SNMP when swap is larger than 4TB

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We have a system with more than 4TB of swap space. I want to measure it's memory with SNMP (because I'm using MRTG to graph it). SNMP is reporting negative numbers for memTotalSwap. I suspect that this is because it's being reported with a 32-bit number:

$ snmpwalk -v 2c -c ******** localhost Memory
UCD-SNMP-MIB::memIndex.0 = INTEGER: 0
UCD-SNMP-MIB::memErrorName.0 = STRING: swap
UCD-SNMP-MIB::memTotalSwap.0 = INTEGER: -205520900 kB
UCD-SNMP-MIB::memAvailSwap.0 = INTEGER: -205520900 kB
UCD-SNMP-MIB::memTotalReal.0 = INTEGER: 784103952 kB
UCD-SNMP-MIB::memAvailReal.0 = INTEGER: 730528620 kB
UCD-SNMP-MIB::memTotalFree.0 = INTEGER: 525007720 kB
UCD-SNMP-MIB::memMinimumSwap.0 = INTEGER: 16000 kB
UCD-SNMP-MIB::memShared.0 = INTEGER: 0 kB
UCD-SNMP-MIB::memBuffer.0 = INTEGER: 412400 kB
UCD-SNMP-MIB::memCached.0 = INTEGER: 21600812 kB
UCD-SNMP-MIB::memSwapError.0 = INTEGER: noError(0)
UCD-SNMP-MIB::memSwapErrorMsg.0 = STRING:

Is there any easy workaround?

snmp

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