MongoDB Database Profiler

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：

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> db.getProfilingLevel() 0 >

 

2.关闭profile功能：

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1	> db.setProfilingLevel(0)

 

3.设置profile级别：

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> 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

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1 2	#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。

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> 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

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#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)