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Operating System:
ALL
Steps To Reproduce:

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0.) Install standard pre-req packages for SNMP
1.) Launch standalone running as --snmp-agent
2.) Run snmpwalk e.g.
snmpwalk -m MONGO-MIB -v 2c -c mongodb 0.0.0.0:1161 1.3.6.1.4.1.34601
3.) Compare field types - compare MIB fields from SNMP walk to those from db.serverStatus()

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0.) Install standard pre-req packages for SNMP 1.) Launch standalone running as --snmp-agent 2.) Run snmpwalk e.g. snmpwalk -m MONGO-MIB -v 2c -c mongodb 0.0.0.0:1161 1.3.6.1.4.1.34601 3.) Compare field types - compare MIB fields from SNMP walk to those from db.serverStatus()

We noticed some counter fields from db.serverStatus mapped to gauge MIB field types. See list below

MIB Object	serverStatus metric	MIB Current Type	MIB Proposed Type
flushTotalMs	backgroundFlushing.total_ms	Integer	counter32
indexCounterAccesses	indexCounters.accesses	Integer	counter32
indexCounterHits	indexCounters.hits	Integer	counter32
indexCounterMisses	indexCounters.misses	Integer	counter32
indexCounterResets	indexCounters.resets	Integer	counter32
networkBytesIn	network.bytesIn	Integer	counter32
networkBytesOut	network.bytesOut	Integer	counter32
globalLockTotalTime	globalLock.totalTime	String	counter64
globalLockLockTime	globalLock.lockTime	String	counter64
metricsGetLastErrorWtimeNum	metrics.getLastError.wtime.num	Integer	counter32
metricsGetLastErrorWtimeTotalMillis	metrics.getLastError.wtime.totalMillis	Integer	counter32
metricsReplApplyBatchesNum	metrics.repl.apply.batches.num	Integer	counter32
metricsReplApplyBatchesTotalMillis	metrics.repl.apply.batches.totalMillis	Integer	counter32
metricsReplNetworkBytes	metrics.repl.network.bytes	String	counter64
metricsReplNetworkGetmoresNum	metrics.repl.network.getmores.num	Integer	counter32
metricsReplNetworkGetmoresTotalMillis	metrics.repl.network.getmores.totalMillis	Integer	counter32
metricsReplOplogInsertTotalMillis	metrics.repl.oplog.insert.totalMillis	Integer	counter32
metricsReplOplogInsertBytes	metrics.repl.oplog.insertBytes	String	counter64
metricsReplPreloadDocsTotalMillis	metrics.repl.preload.docs.totalMillis	Integer	counter32
metricsReplPreloadIndexesTotalMillis	metrics.repl.preload.indexes.totalMillis	Integer	counter32