数据库profiler细粒度收集mongodb的写操作、游标、数据库命令等。可以在数据库级别或者实例级别开启profiling。
profiler将收集到的数据写入system.profile集合中。
profiling的级别：
0, 关闭profile，但是mongod会将超过slowOpThresholdMs的值操作写入日志
1, 只抓取slow操作，缺省是超过100毫秒的操作
2, 抓取所有数据库操作
1.查看是否开启profile功能：
> db.getProfilingLevel() 0 >
2.关闭profile功能：
> db.setProfilingLevel(0)
3.设置profile级别：
> db.setProfilingLevel(1,50)
{ "was" : 0, "slowms" : 100, "ok" : 1 }
>
setProfilingLevel的第一个参数是设置当前数据的profiling级别，第二个参数是设置整个mongod实例的慢操作阈值。
4.设置整个mongod的profiling级别
#启动时，指定参数profile的值 ./mongod --profile=1 --slowms=15
示例：
查看profiler数据
数据库的profiler日志信息位于system.profile集合中。
> db.setProfilingLevel(1,50)
{ "was" : 1, "slowms" : 50, "ok" : 1 }
> db.profilingTest.insert({i:1})
WriteResult({ "nInserted" : 1 })
> db.profilingTest.find()
{ "_id" : ObjectId("56e3f62673c59411c4b1234c"), "i" : 1 }
> db.profilingTest.find({$where:'sleep(70)'})
> db.system.profile.find().pretty()
{
"op" : "insert",
"ns" : "test.currentOpTest",
"query" : {
"insert" : "currentOpTest",
"documents" : [
{
"_id" : ObjectId("56e3ebb713b6892d02827dde"),
"i" : 6411413
}
],
"ordered" : true
},
"ninserted" : 1,
"keyUpdates" : 0,
"writeConflicts" : 0,
"numYield" : 0,
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(1),
"w" : NumberLong(1)
}
},
"Database" : {
"acquireCount" : {
"w" : NumberLong(1)
}
},
"Collection" : {
"acquireCount" : {
"w" : NumberLong(1)
}
}
},
"responseLength" : 25,
"protocol" : "op_command",
"millis" : 50,
"execStats" : {
},
"ts" : ISODate("2016-03-12T10:13:11.073Z"),
"client" : "127.0.0.1",
"allUsers" : [ ],
"user" : ""
}
{
"op" : "insert",
"ns" : "test.currentOpTest",
"query" : {
"insert" : "currentOpTest",
"documents" : [
{
"_id" : ObjectId("56e3ebb713b6892d02827de6"),
"i" : 6411421
}
],
"ordered" : true
},
"ninserted" : 1,
"keyUpdates" : 0,
"writeConflicts" : 0,
"numYield" : 0,
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(1),
"w" : NumberLong(1)
}
},
"Database" : {
"acquireCount" : {
"w" : NumberLong(1)
}
},
"Collection" : {
"acquireCount" : {
"w" : NumberLong(1)
}
}
},
"responseLength" : 25,
"protocol" : "op_command",
"millis" : 166,
"execStats" : {
},
"ts" : ISODate("2016-03-12T10:13:11.252Z"),
"client" : "127.0.0.1",
"allUsers" : [ ],
"user" : ""
}
{
"op" : "insert",
"ns" : "test.currentOpTest",
"query" : {
"insert" : "currentOpTest",
"documents" : [
{
"_id" : ObjectId("56e3ed7e13b6892d028f10a4"),
"i" : 7235419
}
],
"ordered" : true
},
"ninserted" : 1,
"keyUpdates" : 0,
"writeConflicts" : 0,
"numYield" : 0,
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(1),
"w" : NumberLong(1)
}
},
"Database" : {
"acquireCount" : {
"w" : NumberLong(1)
}
},
"Collection" : {
"acquireCount" : {
"w" : NumberLong(1)
}
}
},
"responseLength" : 25,
"protocol" : "op_command",
"millis" : 58,
"execStats" : {
},
"ts" : ISODate("2016-03-12T10:20:46.223Z"),
"client" : "127.0.0.1",
"allUsers" : [ ],
"user" : ""
}
{
"op" : "insert",
"ns" : "test.currentOpTest",
"query" : {
"insert" : "currentOpTest",
"documents" : [
{
"_id" : ObjectId("56e3eea513b6892d02975bee"),
"i" : 7778981
}
],
"ordered" : true
},
"ninserted" : 1,
"keyUpdates" : 0,
"writeConflicts" : 0,
"numYield" : 0,
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(1),
"w" : NumberLong(1)
}
},
"Database" : {
"acquireCount" : {
"w" : NumberLong(1)
}
},
"Collection" : {
"acquireCount" : {
"w" : NumberLong(1)
}
}
},
"responseLength" : 25,
"protocol" : "op_command",
"millis" : 149,
"execStats" : {
},
"ts" : ISODate("2016-03-12T10:25:41.989Z"),
"client" : "127.0.0.1",
"allUsers" : [ ],
"user" : ""
}
{
"op" : "insert",
"ns" : "test.currentOpTest",
"query" : {
"insert" : "currentOpTest",
"documents" : [
{
"_id" : ObjectId("56e3f2bf13b6892d02b4401b"),
"i" : 9672402
}
],
"ordered" : true
},
"ninserted" : 1,
"keyUpdates" : 0,
"writeConflicts" : 0,
"numYield" : 0,
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(1),
"w" : NumberLong(1)
}
},
"Database" : {
"acquireCount" : {
"w" : NumberLong(1)
}
},
"Collection" : {
"acquireCount" : {
"w" : NumberLong(1)
}
}
},
"responseLength" : 25,
"protocol" : "op_command",
"millis" : 143,
"execStats" : {
},
"ts" : ISODate("2016-03-12T10:43:11.201Z"),
"client" : "127.0.0.1",
"allUsers" : [ ],
"user" : ""
}
{
"op" : "insert",
"ns" : "test.profilingTest",
"query" : {
"insert" : "profilingTest",
"documents" : [
{
"_id" : ObjectId("56e3f62673c59411c4b1234c"),
"i" : 1
}
],
"ordered" : true
},
"ninserted" : 1,
"keyUpdates" : 0,
"writeConflicts" : 0,
"numYield" : 0,
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(2),
"w" : NumberLong(2)
}
},
"Database" : {
"acquireCount" : {
"w" : NumberLong(1),
"W" : NumberLong(1)
}
},
"Collection" : {
"acquireCount" : {
"w" : NumberLong(1),
"W" : NumberLong(1)
}
}
},
"responseLength" : 25,
"protocol" : "op_command",
"millis" : 88,
"execStats" : {
},
"ts" : ISODate("2016-03-12T10:57:42.769Z"),
"client" : "127.0.0.1",
"allUsers" : [ ],
"user" : ""
}
{
"op" : "query",
"ns" : "test.profilingTest",
"query" : {
"find" : "profilingTest",
"filter" : {
}
},
"keysExamined" : 0,
"docsExamined" : 1,
"cursorExhausted" : true,
"keyUpdates" : 0,
"writeConflicts" : 0,
"numYield" : 0,
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(2)
}
},
"Database" : {
"acquireCount" : {
"r" : NumberLong(1)
}
},
"Collection" : {
"acquireCount" : {
"r" : NumberLong(1)
}
}
},
"nreturned" : 1,
"responseLength" : 145,
"protocol" : "op_command",
"millis" : 94,
"execStats" : {
"stage" : "COLLSCAN",
"filter" : {
"$and" : [ ]
},
"nReturned" : 1,
"executionTimeMillisEstimate" : 0,
"works" : 3,
"advanced" : 1,
"needTime" : 1,
"needYield" : 0,
"saveState" : 0,
"restoreState" : 0,
"isEOF" : 1,
"invalidates" : 0,
"direction" : "forward",
"docsExamined" : 1
},
"ts" : ISODate("2016-03-12T10:57:55.996Z"),
"client" : "127.0.0.1",
"allUsers" : [ ],
"user" : ""
}
{
"op" : "query",
"ns" : "test.profilingTest",
"query" : {
"find" : "profilingTest",
"filter" : {
"$where" : "sleep(70)"
}
},
"keysExamined" : 0,
"docsExamined" : 1,
"cursorExhausted" : true,
"keyUpdates" : 0,
"writeConflicts" : 0,
"numYield" : 1,
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(8)
}
},
"Database" : {
"acquireCount" : {
"r" : NumberLong(4)
}
},
"Collection" : {
"acquireCount" : {
"r" : NumberLong(4)
}
}
},
"nreturned" : 0,
"responseLength" : 109,
"protocol" : "op_command",
"millis" : 1030,
"execStats" : {
"stage" : "COLLSCAN",
"filter" : {
"$where" : undefined
},
"nReturned" : 0,
"executionTimeMillisEstimate" : 70,
"works" : 3,
"advanced" : 0,
"needTime" : 2,
"needYield" : 0,
"saveState" : 1,
"restoreState" : 1,
"isEOF" : 1,
"invalidates" : 0,
"direction" : "forward",
"docsExamined" : 1
},
"ts" : ISODate("2016-03-12T10:58:07.439Z"),
"client" : "127.0.0.1",
"allUsers" : [ ],
"user" : ""
}
>
5.修改system.profile集合的大小
#1.关闭profiling
> db.setProfilingLevel(0)
#2.删除system.profile集合
> db.system.profile.drop()
#3.创建新得system.profile
> db.createCollection( "system.profile", { capped: true, size:4000000 } )
#4.重新开启profiling功能
> db.setProfilingLevel(1)