mongodb performance issues

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

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

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

The Unity technical support team often reviews and optimizes the performance of the game project for the required customer company projects, and there are many more common aspects of the various project-related issues we have encountered, and here we have listed some common questions and categorized them, and the developer friends can refer to them.Resource Import Texture is not compressed In

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

Label:??Questions:The log is displayed as follows at MongoDB login:[[Email protected]_180 ~]$ mongo-u root-p xxxxx--authenticationdatabase AdminMongoDB Shell version:2.6.4Connecting To:testServer has startup warnings:2015-07-16t04:35:34.694+0800 [Initandlisten]2015-07-16t04:35:34.694+0800 [Initandlisten] * * warning:you is running on a NUMA machine.2015-07-16t04:35:34.694+0800 [Initandlisten] * * We suggest launching mongod like this to avoid

; 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

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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

that are received or transmitted on a specified interface on a network. It also has an option to save the captured package to a file for later analysis. In almost all major Linux releases, tcpdump can be used.# tcpdump-i Eth0tcpdump:verbose output suppressed, use-v OR-VV for full protocol decodeListening on eth0, Link-type EN10MB (Ethernet), capture size bytes22:08:59.617628 IP tecmint.com.ssh > 115.113.134.3.static-mumbai.vsnl.net.in.28472:p 2,532,133,365:2,532,133,481 (116) Ack 3561562349 win

Tags: IDT concurrent scenarios MongoDB multithreaded Data test report God 10gServer Size: Single-node deployment, disk 1T, memory 128G Concurrent Import Size: 1, multithreading concurrent import CSV file 2,csv file 10,000, 100,000, 1 million, 2 million rows of records 4 sizes 3, each CSV corresponds to a collection Concurrency Query Scale 1, multi-threaded concurrent query different collection 2, divided into full table query and local query two scena

, you can directly add the index input: {"name": 1, "Age":-1. Do not drop the table after creating an index. 2. OptimizationCodeImproper use of the method will significantly affect mongdb performance. Here I will list my usage experience: A. simply update the data using template. updatefirst () or template. updatemulti () instead of template. findandmodify (); B. Simply add a data operation and use 'template. insert () 'instead of 'template. Sa

Original: SQL Server 2012 exception Issue (ii)--performance issues caused by installation mediaProblem Description: Production environment A database is upgraded from SQL Server R2 to SQL Server 2012, while the hardware is replaced, but after the migration, the performance decreases significantly, and the performance o

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

, write wrong place please many treatise.——————— 2013.08.29 Split Line ——————————At night, the following PHP 5.4.10 the source code, the interest of In_array is really big ah, haha, located in the./ext/standard/array.c line 1248th, you can see that he called the Php_search_array function, the following Array_ Serach is also the tune of this, only the last parameter is different! After some tracking, in the case of In_array, he finally called the function zendi_smart_strcmp (really a "smart" func

way is to use the Picture Wizard (CSS Sprite). The picture Wizard is to put many pictures in a large picture, through the CSS to display part of the picture.As for the Picture Wizard operation details are not much to do introduction, online related content a lot.9, attention to control cookie size and pollutionBasic principles and methods of use:Basic and advanced knowledge of cookies can be seen in an article I wrote, "JavaScript Operation Cookie."Because the cookie is a local disk file, every

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

Label:Do you encounter performance problems when using MongoDB? Here is a summary of the five steps of MongoDB performance optimization, which I hope will help. First step: Find the slow statement In general, query statements are too slow and performance problem bottlenecks