|
While running an insert-only test, I noticed that mongostat shows queued readers, while I do not read anything.
Sample mongostat output:
insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time
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6120 *0 *0 *0 0 2|0 0 16g 32.3g 1.97g 0 test:68.3% 0 19|0 0|1 6m 3k 23 19:33:03
|
6061 *0 *0 *0 0 2|0 0 18g 36.3g 1.99g 1 test:76.4% 0 19|0 0|1 6m 8k 23 19:33:04
|
5966 *0 *0 *0 0 1|0 0 18g 36.3g 2.02g 0 test:63.3% 0 19|0 0|1 6m 3k 23 19:33:05
|
6110 *0 *0 *0 0 1|0 0 18g 36.3g 2.04g 0 test:68.4% 0 19|0 0|1 6m 3k 23 19:33:06
|
db.currentOp output for the same time:
> db.currentOp()
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{
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"inprog" : [
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{
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"opid" : 824735,
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"active" : false,
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"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
|
},
|
"client" : "10.61.157.244:60486",
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"desc" : "conn62",
|
"threadId" : "0x7f37873b4700",
|
"connectionId" : 62,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824726,
|
"active" : false,
|
"op" : "insert",
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"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60494",
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"desc" : "conn72",
|
"threadId" : "0x7f37871b2700",
|
"connectionId" : 72,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
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{
|
"opid" : 824740,
|
"active" : false,
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"op" : "insert",
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"ns" : "",
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"insert" : {
|
|
},
|
"client" : "10.61.157.244:60484",
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"desc" : "conn63",
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"threadId" : "0x7f3f851a3700",
|
"connectionId" : 63,
|
"locks" : {
|
"^test" : "W"
|
},
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"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824743,
|
"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60493",
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"desc" : "conn71",
|
"threadId" : "0x7f3f855a7700",
|
"connectionId" : 71,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
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"timeAcquiringMicros" : {
|
|
}
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}
|
},
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{
|
"opid" : 824739,
|
"active" : false,
|
"op" : "insert",
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"ns" : "",
|
"insert" : {
|
|
},
|
"client" : "10.61.157.244:60489",
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"desc" : "conn67",
|
"threadId" : "0x7f3f850a2700",
|
"connectionId" : 67,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824741,
|
"active" : false,
|
"op" : "insert",
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"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60499",
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"desc" : "conn77",
|
"threadId" : "0x7f3f859ab700",
|
"connectionId" : 77,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824733,
|
"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
|
},
|
"client" : "10.61.157.244:60497",
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"desc" : "conn75",
|
"threadId" : "0x7f3f854a6700",
|
"connectionId" : 75,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824725,
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"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60495",
|
"desc" : "conn73",
|
"threadId" : "0x7f3786dae700",
|
"connectionId" : 73,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
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{
|
"opid" : 824727,
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"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60501",
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"desc" : "conn79",
|
"threadId" : "0x7f3f853a5700",
|
"connectionId" : 79,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824728,
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"active" : false,
|
"op" : "insert",
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"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60483",
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"desc" : "conn65",
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"threadId" : "0x7f3786eaf700",
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"connectionId" : 65,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
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{
|
"opid" : 824736,
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"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60496",
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"desc" : "conn74",
|
"threadId" : "0x7f3786fb0700",
|
"connectionId" : 74,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824738,
|
"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
|
},
|
"client" : "10.61.157.244:60490",
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"desc" : "conn68",
|
"threadId" : "0x7f37870b1700",
|
"connectionId" : 68,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824742,
|
"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60488",
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"desc" : "conn66",
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"threadId" : "0x7f37872b3700",
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"connectionId" : 66,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
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{
|
"opid" : 824732,
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"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
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},
|
"client" : "10.61.157.244:60498",
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"desc" : "conn76",
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"threadId" : "0x7f3f85cae700",
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"connectionId" : 76,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
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{
|
"opid" : 824730,
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"active" : false,
|
"op" : "insert",
|
"ns" : "",
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"insert" : {
|
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},
|
"client" : "10.61.157.244:60491",
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"desc" : "conn69",
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"threadId" : "0x7f3f85aac700",
|
"connectionId" : 69,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824729,
|
"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
|
},
|
"client" : "10.61.157.244:60487",
|
"desc" : "conn64",
|
"threadId" : "0x7f3f85daf700",
|
"connectionId" : 64,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824734,
|
"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
|
},
|
"client" : "10.61.157.244:60500",
|
"desc" : "conn78",
|
"threadId" : "0x7f3f856a8700",
|
"connectionId" : 78,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824731,
|
"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
|
},
|
"client" : "10.61.157.244:60502",
|
"desc" : "conn80",
|
"threadId" : "0x7f3f852a4700",
|
"connectionId" : 80,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
},
|
{
|
"opid" : 824737,
|
"active" : false,
|
"op" : "insert",
|
"ns" : "",
|
"insert" : {
|
|
},
|
"client" : "10.61.157.244:60503",
|
"desc" : "conn81",
|
"threadId" : "0x7f3f857a9700",
|
"connectionId" : 81,
|
"locks" : {
|
"^test" : "W"
|
},
|
"waitingForLock" : true,
|
"numYields" : 0,
|
"lockStats" : {
|
"timeLockedMicros" : {
|
|
},
|
"timeAcquiringMicros" : {
|
|
}
|
}
|
}
|
]
|
}
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