MongoDB在负载下执行慢速读取查询
我在VPS上运行MongoDB。同一个python机器人的两个实例不断地读写文档。本质上，他们不断地无限重复以下步骤：MongoDB在负载下执行慢速读取查询,mongodb,pymongo,Mongodb,Pymongo,我在VPS上运行MongoDB。同一个python机器人的两个实例不断地读写文档。本质上，他们不断地无限重复以下步骤： 使用find\u和
find\u和find（）find\u and\u modify（）update（）currentOp（）> db.currentOp({"secs_running": {"$gte": 5}})
{
"inprog" : [
{
"type" : "op",
"host" : "localhost:27017",
"desc" : "conn1555",
"connectionId" : 1555,
"client" : "127.0.0.1:37750",
"clientMetadata" : {
"driver" : {
"name" : "PyMongo",
"version" : "3.11.3"
},
"os" : {
"type" : "Linux",
"name" : "Linux",
"architecture" : "x86_64",
"version" : "5.4.0-71-generic"
},
"platform" : "CPython 3.8.5.final.0"
},
"active" : true,
"currentOpTime" : "2021-04-27T13:37:56.261+00:00",
"opid" : 3151480,
"lsid" : {
"id" : UUID("71d36512-c5a3-4fe9-b3f9-31fd23e86413"),
"uid" : BinData(0,"47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=")
},
"secs_running" : NumberLong(123),
"microsecs_running" : NumberLong(123430156),
"op" : "command",
"ns" : "nxmain.websites",
"command" : {
"aggregate" : "websites",
"pipeline" : [
{
"$match" : {
}
},
{
"$group" : {
"_id" : 1,
"n" : {
"$sum" : 1
}
}
}
],
"cursor" : {
},
"lsid" : {
"id" : UUID("71d36512-c5a3-4fe9-b3f9-31fd23e86413")
},
"$db" : "nxmain",
"$readPreference" : {
"mode" : "primaryPreferred"
}
},
"planSummary" : "COLLSCAN",
"numYields" : 934,
"locks" : {
"ReplicationStateTransition" : "w",
"Global" : "r",
"Database" : "r",
"Collection" : "r"
},
"waitingForLock" : false,
"lockStats" : {
"ReplicationStateTransition" : {
"acquireCount" : {
"w" : NumberLong(936)
}
},
"Global" : {
"acquireCount" : {
"r" : NumberLong(936)
}
},
"Database" : {
"acquireCount" : {
"r" : NumberLong(936)
}
},
"Collection" : {
"acquireCount" : {
"r" : NumberLong(936)
}
},
"Mutex" : {
"acquireCount" : {
"r" : NumberLong(2)
}
}
},
"waitingForFlowControl" : false,
"flowControlStats" : {
}
},
{
"type" : "op",
"host" : "localhost:27017",
"desc" : "conn1535",
"connectionId" : 1535,
"client" : "127.0.0.1:36886",
"clientMetadata" : {
"driver" : {
"name" : "PyMongo",
"version" : "3.11.3"
},
"os" : {
"type" : "Linux",
"name" : "Linux",
"architecture" : "x86_64",
"version" : "5.4.0-71-generic"
},
"platform" : "CPython 3.8.5.final.0"
},
"active" : true,
"currentOpTime" : "2021-04-27T13:37:56.261+00:00",
"opid" : 3152992,
"secs_running" : NumberLong(7),
"microsecs_running" : NumberLong(7503765),
"op" : "command",
"ns" : "admin.$cmd",
"command" : {
"ismaster" : 1,
"topologyVersion" : {
"processId" : ObjectId("60845741af792cc59a636f20"),
"counter" : NumberLong(0)
},
"maxAwaitTimeMS" : 10000,
"$db" : "admin",
"$readPreference" : {
"mode" : "primary"
}
},
"numYields" : 0,
"waitingForLatch" : {
"timestamp" : ISODate("2021-04-27T13:37:48.858Z"),
"captureName" : "AnonymousLatch"
},
"locks" : {
},
"waitingForLock" : false,
"lockStats" : {
},
"waitingForFlowControl" : false,
"flowControlStats" : {
}
}
],
"ok" : 1
}
secs_:123我的问题的原因是什么？我该如何解决？提前感谢。其中一个操作是管理命令。是web服务器还是机器人？聚合管道的用途是什么？可以分析慢速查询（更新、读取、删除）以找出原因-生成查询计划。@Sergio:admin命令是REST API的web服务器的命令@乔：说得好！再调查一下。聚合管道是mongodb在使用pymongo命令
collection.count_documents（{}）{}{“\u id”：{“$exists”：true}collection.count（）