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Type:
Question
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Resolution: Done
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Priority:
Major - P3
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None
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Affects Version/s: 2.4.10
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Component/s: Diagnostics
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None
Is db.currentOp() limited to 5 operations? I've never seen more than five entries returned in the inprog array. If so, that should be documented.
I'm also experiencing what appears to be zombie queries: running db.currentOp() several times (varies from 5 to over 20) in a row outputs 5 query operations with secs_running: 0, after which it outputs an empty inprog. The connection IDs are the same conn55-conn59 but the opids keep changing and the queries are different. It seems as if db.currentOp() displays a history of queries rather. Here's one output:
mongod-2.4.10| stockbase-prod> db.currentOp()
{
"inprog": [
{
"active": true,
"client": "127.0.0.1:51757",
"connectionId": 55,
"desc": "conn55",
"lockStats": {
"timeAcquiringMicros": {
"r": NumberLong("167661"),
"w": NumberLong("0")
},
"timeLockedMicros": {
"r": NumberLong("185231"),
"w": NumberLong("0")
}
},
"ns": "stockbase-prod.companies",
"numYields": 17,
"op": "query",
"opid": 4637790,
"query": {
"$query": {
"symbol": {
"$options": "i",
"$regex": "^.+itpc"
}
},
"orderby": {
"symbol": 1
}
},
"secs_running": 0,
"threadId": "0x7f9fa8ee9700",
"waitingForLock": false
},
{
"active": true,
"client": "127.0.0.1:51760",
"connectionId": 58,
"desc": "conn58",
"lockStats": {
"timeAcquiringMicros": {
"r": NumberLong("115074"),
"w": NumberLong("0")
},
"timeLockedMicros": {
"r": NumberLong("169989"),
"w": NumberLong("0")
}
},
"ns": "stockbase-prod.companies",
"numYields": 17,
"op": "query",
"opid": 4637792,
"query": {
"$query": {
"symbol": {
"$options": "i",
"$regex": "^.+bfcf"
}
},
"orderby": {
"symbol": 1
}
},
"secs_running": 0,
"threadId": "0x7f9fa91ec700",
"waitingForLock": false
},
{
"active": true,
"client": "127.0.0.1:51761",
"connectionId": 59,
"desc": "conn59",
"lockStats": {
"timeAcquiringMicros": {
"r": NumberLong("143480"),
"w": NumberLong("0")
},
"timeLockedMicros": {
"r": NumberLong("189736"),
"w": NumberLong("0")
}
},
"ns": "stockbase-prod.companies",
"numYields": 16,
"op": "query",
"opid": 4637791,
"query": {
"$query": {
"symbol": {
"$options": "i",
"$regex": "^.+sfl"
}
},
"orderby": {
"symbol": 1
}
},
"secs_running": 0,
"threadId": "0x7f9fa92ed700",
"waitingForLock": false
},
{
"active": true,
"client": "127.0.0.1:51759",
"connectionId": 57,
"desc": "conn57",
"lockStats": {
"timeAcquiringMicros": {
"r": NumberLong("47742"),
"w": NumberLong("0")
},
"timeLockedMicros": {
"r": NumberLong("81799"),
"w": NumberLong("0")
}
},
"locks": {
"^": "r",
"^stockbase-prod": "R"
},
"ns": "stockbase-prod.companies",
"numYields": 1,
"op": "query",
"opid": 4637793,
"query": {
"$query": {
"symbol": {
"$options": "i",
"$regex": "^.+lvnta"
}
},
"orderby": {
"symbol": 1
}
},
"secs_running": 0,
"threadId": "0x7f9fa90eb700",
"waitingForLock": false
},
{
"active": true,
"client": "127.0.0.1:51758",
"connectionId": 56,
"desc": "conn56",
"lockStats": {
"timeAcquiringMicros": {
"r": NumberLong("44177"),
"w": NumberLong("0")
},
"timeLockedMicros": {
"r": NumberLong("74988"),
"w": NumberLong("0")
}
},
"locks": {
"^": "r",
"^stockbase-prod": "R"
},
"ns": "stockbase-prod.companies",
"numYields": 1,
"op": "query",
"opid": 4637794,
"query": {
"$query": {
"symbol": {
"$options": "i",
"$regex": "^lvnta"
}
},
"orderby": {
"symbol": 1
}
},
"secs_running": 0,
"threadId": "0x7f9fa8fea700",
"waitingForLock": false
}
]
}