mongodb profiling level

MongoDB Database ProfilingMongoDB Profiler is a system that captures database execution activity, which can help identify slow queries and operations.Profiling levelThe available capture levels have the following meanings:level Set0 disable1 enabled,

SummaryThe previous article introduced the MapReduce aggregation operation. This article will continue to learn, DB has, collection and document also have, basically enough, but as the project on-line, found more and more business data, query

March 25 MongoDB (taken from "Humongous") 1.4 release shortly after its founder Dwight Merriman (formerly DoubleClick Ceo/cto) announced 10gen--open source document database MongoDB behind the company, It will provide business training and

The 1th chapter of MongoDB installation(Dawn Hello original works, reproduced please specify)1.1 MongoDB IntroductionMongoDB is a database open source project based on distributed file storage. Written in the C + + language, it is designed to

Recommended method Three, the simplest and easiest to viewA: If MongoDB has been running for a long time, the view mongod.log is very large, can not open to view the corresponding information#ps-ef|grep MongodFind the PID of the corresponding Mongod

Dex introduces mongodb index and query analyzer dex. It is a MongoDB performance adjustment tool that compares MongoDB log files and index entries and provides index recommendations. Currently, you must provide a URI to connect to the database. Dex

MongoDB is a database based on distributed file storage. Written by the C + + language. Designed to provide scalable, high-performance data storage solutions for WEB applications. MongoDB is a product between relational database and non relational

First, index MongoDB provides a variety of index support, indexed information is kept in system.indexes, and the default is always to create an index for _id, which uses the same relational database as MySQL. In fact, it can be said that the index

MongoDB Performance Chapter-Create indexes, composite indexes, unique indexes, delete indexes and explain execution plansFirst, the indexMongoDB provides a variety of index support, the index information is saved in System.indexes, and the default

When you insert multiple documents into a collection, each document is persisted by the underlying storage engine, and a location information is available to read the document from the storage engine. For example, in the MMAPV1 engine, location