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In this example, you can see that the $queryStats stage returns information about the mongos:
db.getSiblingDB("admin").aggregate([{$queryStats:{}},{$match: {"key.queryShape.cmdNs.coll":"config.monitoring.agentSessions","key.client.application.name":/Shell/,"key.$readPreference":null}},{$project:{"key.client.mongos":1}}]).pretty()
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{
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"key" : {
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"client" : {
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"mongos" : {
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"host" : "[atlas-d9q8oq-shard-00-01.yqitg.mmscloudteam.com:27016|http://atlas-d9q8oq-shard-00-01.yqitg.mmscloudteam.com:27016]",
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"client" : "173.63.102.138:64387",
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"version" : "7.2.0-rc1"
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}
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}
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}
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}
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This includes IP addresses and ports which are likely too specific and high-cardinality, so we should remove this whole "mongos" section for the $queryStats output.
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