mongodb vs rdbms performance

Use Yii2-mongodb in the YII2 inside the main to improve which piece of performance? Reply content: Use Yii2-mongodb in the YII2 inside the main to improve which piece of performance? MongoDB is a NoSQLMySQL is the traditional dbAs for the

When $ or and sort () are used in MongoDB, a solution with poor query performance is mentioned in the previous article. when $ or and sort () are used in MongoDB, query performance may be poor. for details, refer to mongodb's plan. this bug may be modified in version 2.5.w. I encountered this problem in my project, and

MongoDB version 3.2 Wiredtiger storage engine performance test Chszs, not allowed to reprint without Bo master. Permission to reprint should be marked by the author and blog home: Http://blog.csdn.net/chszsMongoDB 3.2 was recently released, and it uses Wiredtiger as its default storage engine. Over the past five years, MongoDB has evolved from birth to popularity

Tags: MongoDB performance optimizationMongoDB Linux performance optimization: https://docs.mongodb.com/manual/administration/production-notes/#allocate-sufficient-ram-and-cpuPerformance optimization:1. Close the Atime storage volume that contains the database files.2, according to the recommendations in the Ulimit reference, the file descriptor limit,-n User proc

In YII2, which one of the main performance can be improved by using yii2-mongodb? In YII2, which one of the main performance can be improved by using yii2-mongodb? Reply content: In YII2, which one of the main performance can be improved by using yii2-

, "IsEOF": 1, "Invalidates": 0, "Direction": "Forward", "Docsexamined": 866283 }, "TS": Isodate ("2016-06-04t03:57:10.206z"), "Client": "127.0.0.1", "AllUsers": [ ], "User": ""}Use the following command to view the latest recordsDb.system.profile.find (). Sort ({$natural:-1})There is also a more concise way to viewShow profileThis command can view the last 5 recordsThe information content provided by profile is explainedTS: When the command i

When a new Web machine node is added to the project, the performance of its MongoDB cluster is found to be impacted, at the peak of the request, and the MongoDB response time becomes very long. Monitoring found that the number of connections MongoDB at peak times reached around 1100~1500, which resulted in considerabl

Dotnet core uses MongoDB for high-performance Nosql database operations. mongodbnosql I haven't written a Blog for a long time. I watched the open-source Java Community drool every day, and I was so confused that I finally waited for the official release of dotnet core in March, Looking at the dotnet community, it is also a thriving phenomenon. I don't want to bind Windows. I believe that the spring of dotn

In MongoDB, you can use the Db.collection.explain ("executionstats") statement to analyze query performance. Create the table inventory in MongoDB and insert the test data, the initial data in addition to the ID field is not indexed. {"_id": 1, "item": "F1", type: "Food", quantity:500} {"_id": 2, "item": "F2", type: "Food", quantity:100} {"_id": 3, "item": "P1"

indexes in test table Db.test.fropIndexes (); Delete the name index from the test table Db.test.dropIndex ({name:1}); To parse an SQL statement using the index condition command: Db.test.find (). explain (); Performance optimization: Explain execution plan MongoDB provides a explain command to learn how a query request is handled by the system. The explain command provides a good view of how the system u

Although many open-source tools use plug-ins or other methods to monitor the internal performance provided by these open-source components (the so-called internal performance is the data obtained by the STAT command class provided by these open-source components ), however, both deployment and expansion are troublesome. In fact, it takes 1-2 days to implement such a tool, and it is also very convenient to s

Recently busy to transfer a project from MySQL to MongoDB, in the process of importing old data, encountered some twists and turns, made a lot of mistakes, but also learned a lot of knowledge, so recorded. The company specially equipped with several high-performance server for this project, exclusively dual quad core Hyper-threading CPU, plus 32G of memory, operation and maintenance personnel after the in

MongoDB comes with a web interface monitor.Configuration is simple, only need to add parameters at boot time:--httpinterface or write httpinterface=true to the configuration file to restart. Enter in the browser: Ip:mongodb port number +1000 For example, the database port is 20011, the monitoring page is: ip:21011/export/mongodb/bin/mongod-f/export/mongodb/conf/m

; otherwise, the machine memory is too small, resulting in frequent swap writes. In this case, you need to upgrade the memory or expand Locked % The percentage of lock time. Try to keep it below 50%. Idx Miss % index Miss percentage. If the index is too high, check whether the index is missing. Q t | r | w when MongoDB receives too many commands and the database is locked and cannot be executed, it adds the commands to the queue. This column

the monitoring situation:650 ) this.width=650; "class=" AlignCenter size-full wp-image-1391 "src=" http://www.mrliangqi.com/wp-content/uploads/ 2017/03/2017032708.png "width=" "height=" 649 "style=" border:5px solid rgb (235,235,235); margin-left:auto; margin-right:auto;height:auto;padding:0px; "/>650" this.width=650; "class=" AlignCenter size-full wp-image-1392 " Src= "Http://www.mrliangqi.com/wp-content/uploads/2017/03/2017032709.png" width= "height=" 575 "style=" border : 5px solid RGB (235,

the monitoring situation:650 ) this.width=650; "class=" AlignCenter size-full wp-image-1391 "src=" http://www.mrliangqi.com/wp-content/uploads/ 2017/03/2017032708.png "width=" "height=" 649 "style=" border:5px solid rgb (235,235,235); margin-left:auto; margin-right:auto;height:auto;padding:0px; "/>650" this.width=650; "class=" AlignCenter size-full wp-image-1392 " Src= "Http://www.mrliangqi.com/wp-content/uploads/2017/03/2017032709.png" width= "height=" 575 "style=" border : 5px solid RGB (235,

Tags: des io ar using SP on problem CTI ADHardware and Software EnvironmentMySQL version: 5.1.50, driver version: 5.1.6 (the latest 5.1.13 has a lot of assorted problems)MongoDB version: 1.6.2, driver version: 2.1Operating system: Windows XP SP3 (This effect should not be small)Cpu:intel Core2 E6550 2.33GMemory: 2G (Enough)MySQL startup parameters: Bin\mysqld--no-defaults--console--character-set-server=utf8--max_connections=1000--max_user_ connections

Tags: min. sh Memory command line run Modify scenario multiple IMAMongoDB's library-level lock MongoDB is currently the most popular NoSQL database, with its natural document-type data structures, flexible data patterns, and easy-to-use horizontal scaling capabilities that have been favored by many developers. But gold is no can't pure perfect, MongoDB is not without its weaknesses, such as its library-leve

After the new Web Machine node was added to the project, it was found that the performance of its MongoDB cluster was beginning to suffer, and the response time of MongoDB became very long during the peak period of the request. The monitoring found that the number of MongoDB connections reached around 1100~1500 at its

1.mongo Lock Overview:Features of each version lock:当前版本 生产版本最高是 2.6.7[Production Release (2.6.7)] 开发版本是 3.0.0-rc7[Development Releases (unstable)3.0.0] Version Ps:mysql's InnoDB and Oracle support row locks. The highest version of production release is 2.6.7, which supports only library-level locks, and when a MongoDB is in the write state, other operations are done. Although MONGO has a library lock, it can still maintain high