mongoose performance

Conditional queryModel.find (conditions, [fields], [options], [callback])Demo1Try.jsvarUser = require ("./user.js"); function getbyconditions () {varWherestr = {'username':'xiaoming'}; User.find (WHERESTR, function (err, res) {if(Err) {Console.log ("

var Commentschema = { Data:{type:objectid, ref: ' Data '},//data data table, where data ID from:{type:objectid is stored, ref: ' User '},/ /USER User table, save user ID replay:[ {from : {type:objectid, ref: ' User '}, to

InquireBefore our collection has been created successfully, let's start with the first step--query.There are many types of queries, such as conditional query, filter query, and so on, today we only learn the most basic find query.Example :1.find

interface function while encapsulating some of the application logic. Server-side database servers primarily provide data storage capabilities, and also provide partial application logic through triggers and stored procedures. C/S/S structure is the client/application server/Database server three-tier structure, the middle of the addition of application server, usually implement the application logic, is the connection between the client and the database server bridge. It responds to requests f

The author has done some optimization work in the iOS development process, has some superficial understanding to the iOS performance optimization, has been wanting to own these experiences, summarizes briefly.As the first of the series, I intend to summarize some of the general principles of iOS optimization. Because I think whether the list smoothness optimization, startup time optimization or other aspects of optimization, there are some common prin

Original http://www.cnblogs.com/BoyceYang/archive/2013/06/15/3138142.html Read navigation 1. Overview 2.RulesLogic Database Design 3.EnableDesign with efficient Indexes 4.EnableEfficient Query Design 5.EnableLow performance analysis with technology 6. Summary 1. Overview This is the most effective way to optimize SQL server performance by finding areas that can significantly improve

Here we introduce performance testing, load testing, and stress testing. As one of the important quality attributes of ISO 9126 internal and external quality, efficiency is defined as the ability of a software product to provide the right performance relative to the amount of resources used in the specified conditions. Resources may include software and hardware configurations for other software products or

Recently, I 've been struggling with how to analyze and tune performance, starting with hardware orCodeOr database. From the Operating System (CPUScheduling, memory management, process scheduling, DisksI/O), Network, protocol (HTTP,TCP/IP), Or from the applicationProgramCode, database optimization, and middleware configuration. Multiple MiddlewareWebMiddleware (Apache,IIS), Application Middleware (Tomcat,WebLogic,WebSphere) And so on. Even though the

Build high performanceASP. NETSite Chapter 5-Performance Tuning Overview (previous) During this time, the seriesArticleI reorganized it. The previous introduction to performance optimization was not very clear. It can be said that starting from this article, it is the beginning of a complete series. Links to articles: Build high performanceASP. NETSite Opening Build high performanceASP. NETO

To improve system performance, developers can optimize the system from every angle and level of the system. In addition to the most common code optimizations, the software architecture, the JVM virtual machine layer, the database, and the operating system layer can be tuned in a variety of ways to improve overall system performance.Design TuningDesign tuning is at the top of all tuning methods, and it often needs to be done before software development

This article is originally from abroad this article: PHP performance Evolution 2016, thanks to the high-availability architecture of the public number translated into the Chinese version, here is reproduced in the highly available architecture translated articles from PHP 5 to PHP 7 performance full evaluation (including the unpublished JIT version of PHP 8 contrast), A slightly adjusted format.Introduction

Performance test-function Performance Analysis Chapter -quantify After stress testing with Act (application Center test), how to locate the module that found the performance problem, and discover the performance bottleneck, requires you to understand a performance analysis t

BuildHigh PerformanceASP. NET application (2 )-Performance OptimizationLimit Method InPrevious ArticleWe have already stressed the importance of thinking, because thinking determines the follow-up actions. Many times, when building a high-performance application, we need to know how to improve the application.ProgramIn other words, we need to know from which aspects to improve the

Seven Tips for improving MySQL performance: mysql Performance Original article: 7 keys to better MySQL performanceAuthor: Peter ZaitsevTranslator: Peter Note: As the size and load increase, MySQL performance tends to decline. Remember these tips to keep MySQL running smoothly. One of the ways to measure an application is to look at

Brief description of performance testing and brief description of Performance TestingPerformance Test content========================================================== ========================================================== ==========================================Currently, accurate definitions of performance tests are rarely seen, but

MySQL performance tuning and Architecture design--9th chapter The performance optimization of MySQL database schema designPreface: Many people think that performance is optimized in the process of writing code (program code or database code), in fact, this is a very big misunderstanding. The real impact of the most performanc