db2 performance tuning

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Linux Performance Tuning 5: optimizing soft raid

Linux Performance Tuning 5: tuning an Important Role in soft raid storage. RAID independent redundant disk arrays are classified into two types: raid card-based hard raid (hardware implementation, high speed, suitable for large-scale applications), system-based soft raid (generally included in the kernel, performance i

MySQL performance tuning and architecture design--the 12th chapter on the Basic principles of extensible design

always pay attention to it in the design, remember. MySQL database is so hot in the internet industry, in addition to its open source features, easy to use, there is a very important factor is the scalability of a greater advantage. Each of its different storage engines has features that can be used to address a variety of different scenarios. Its Replication and Cluster features are a very effective means of enhancing extensibility.Excerpt from: "MySQL per

SQL Server database Performance tuning tips

Label:Original: SQL Server database Performance tuning tipsThe reasons for the slow query are many, and the following are common: 1. No index or index is not used; 2, I/O throughput is small, forming a bottleneck effect; 3, insufficient memory; 4, the network speed is slow; 5, the amount of data queried is too large; 6, lock or deadlock; 7, the return of unnecessary rows and columns; 8, query statement is n

Linux performance and tuning guide 3.4 hard drive bottleneck

user data on each disk, Causing greater I/O rates to the physical disk and allowing disk bottlenecks to occur. The most common disk bottleneck is that the hard disk is too small; Most disk configurations are based on capacity requirements rather than performance; The cheapest solution may be a small number of large-capacity disks; The second most common problem is having too handle logical disks on the same array. This increases seek time and signif

TraceView of the Android Performance tuning tool

From January Google released 16 series of video on performance optimization, this period of time in the major communities have seen a lot of excellent articles about the optimization series. We have analyzed the causes of performance, shared how to optimize our applications, and introduced tools to help us detect performance issues.One of the tools that is descri

Remember the performance tuning of a Web service

PrefaceA project in the development, testing, on-line, then the size of the user is still relatively small, so just on-line projects are generally stable performance. However, with the passage of time, the increase in the number of users, the increase in QPS and other factors will cause the project slowly show a half-day unresponsive situation. In the previous work also happened to encounter this process, at that time, the project carried out a lot of

Quick improvement of the DB2 database IMPORT Command Performance

In a partitioned DB2 database environment, you can use Buffered Insert to improve the IMPORT performance. Before executing the IMPORT command, bind the BIND file db2uimpm corresponding to the IMPORT command with the insert buf parameter. bnd. There are three ways to improve the IMPORT command performance: [Product] DB2

Lao Li share: Performance tuning operating system-level load analysis

Lao Li share: Performance tuning operating system-level load analysisThe load is broadly divided into two categoriesA.CPU loadB.I/O loadIf an application needs to perform large-scale computations, although the program and disk do not have data I/O, it can take a long time to complete processing, mainly because the program relies on CPU computing, which creates the load pressure on the cup, which is called a

GC Analysis of three-performance tuning experience Summary

Performance Tuning Experience SummaryThe problem arises:In the daily environment, a server, for example, the machine's number of visits per second is around 368, the maximum number of visits at 913. The performance of the external service is that every two or three hours there is a second level of time client request timeout, in the case of increased traffic, the

Java Performance Optimization Series 3.1[JVM tuning]

compressing and extending the heap space:-xx:minheapfreeratio: Sets the minimum idle scale for heap space. The default is 40. When the free memory in the heap space is less than this value, the JVM expands the heap space.-xx:maxheapfreeratio: Sets the maximum idle scale for heap space. The default is 70. When the free memory in the heap space is greater than this value, the heap space is compressed and a smaller heap is obtained.When-xms and-xmx are equal, both parameters of-xx:minheapfreeratio

Web and Performance tuning

Performance Tuning for Nginx1 Modify the core number of CPUs corresponding to the Nginx work process this is generally your CPU core number of twice times, founder is multiples, specific to several times to see the specific hardware configuration2 Modifying the file descriptor 65536 ulimit-n Permanent effect can be changed/etc/sysctl.conf3 Modifying the Linux kernel scheduling algorithm Epoll4 Modifying the

Fifth chapter (1.6) Depth learning--the common eight kinds of neural network performance Tuning Scheme _ Neural network

First, the main method of neural network performance tuning the technique of data augmented image preprocessing network initialization training The selection of activation function different regularization methods from the perspective of data integration of multiple depth networks 1. Data augmentation The generalization ability of the model can be improved by increasing the amount of data without changing t

Android Interface Performance Tuning manual

operations, SQL operations, list refreshes, etc.) consume resources using the background process to implement, can not occupy the UI thread, the UI thread is the main thread, the main thread is the key to keep the program smooth, should only operate those core UI operations, such as processing view properties and drawing; Minimize the wake-up mechanism. We often use broadcasts to receive messages and events that are expected to respond, but too much of the response exceeds our own requireme

It is not difficult to improve the IMPORT command performance in the DB2 database!

The following articles mainly describe the actual operation solution for correctly Improving the IMPORT command performance in the DB2 database. If you are curious about the actual operation solution for correctly Improving the IMPORT command performance in the DB2 database, the following articles will unveil its myste

Analyze the main misunderstanding of DB2 database performance

Analyze the main misunderstanding of DB2 database performance Main misunderstandings about DB2 database performance: Logical design should always be fully mapped to Physical Design Actual: the physical design in the DB2 database design should be as close as possible to the

Go language Development (eight), go Language program testing and performance tuning

Go language Development (eight), go Language program testing and performance tuning Introduction of the Go Language Automation testing Framework 1. Introduction to Automated testing framework The testing of the Go Language standard package provides a framework for unit testing (functional testing) and a common approach to performance testing (stress testing) that

A collection of Java performance tuning tips

A collection of Java performance tuning tipsBrother LianResources available for program utilization ( memory,CPU time, network bandwidth, etc. ) is limited, the goal of optimization is to allow the program to complete the scheduled tasks with as few resources as possible. Optimization usually consists of two parts: reducing the volume of the Code and improving the efficiency of the Code. The main discussion

Performance Tuning UI chapter (i)--viewstub

In the project, we are busy with the implementation of the function, the overall performance of the app is poor. Every page load is stuck. The summer vacation is coming soon, and the project team has specially arranged a version to improve the performance. The version hasn't started yet, and I'm here to record some of the performance

Performance Tuning: Consumption analysis

This article is a systematic summary of the consumption analysis in performance tuning.For additional space on the Performance tuning series, see.Performance Tuning: CPU consumption analysisPerformance tuning: IO consumption analysisPerformance

Performance testing and tuning to combat

Course Description This video is an example to explain, is the author many years of practical work encountered some problems summarized and refined. The goal is to give the reader a correct and clear idea of the video can be done on their own, after understanding the video, can be directly applied to the project work, to play the value of performance test engineers.To learn the performance test can not be

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