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cache = max memory * 50%
Procedure cache size = max memory * 20-30%
Number of user connections = N (default = 25)
Number of lock = N * Maximum number of locks required by a single user * 120%
(Generally, this is difficult to estimate. The reference value provided by senior syabse engineers: 1.8 million for users. I estimate that 100000 is recommended for 10 Gb of data)
Number of open objects = 10000
Number of open indexed = 10000
This configuration can basically be used normally. You can down
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
Performance Analysis: The main purpose of CPU performance analysis is to count the function's invocation and execution time, or, more simply, to count the application's CPU usage. There are usually two ways of CPU monitoring and CPU snapshots to display CPU performance analysis results.Memory Performance Analysis: The
Basically, the main considerations for Hibernate performance tuning are as follows:? database Design Tuning? HQL optimization? Proper use of APIs (e.g., different collections and query APIs based on different business types)? Main configuration parameters (log, query cache, fetch_size, batch_size, etc.)Map file optimization (ID generation policy, Level two cache,
Objective
Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most effective ways to do this is through Oracle tuning. It has a large number of
Tags: mysql, mariadbEvery day seems very busy, in fact, found themselves still very lazy, read a lot of books, not a good read. Recently, not so much work, decided to finish reading a few books, and continue to keep on updating. I hope I can persist in the end! The later content is all about MySQL management (performance tuni
In the case of performance problems with Oracle databases, it is less effort to use Oracle's own toolkit to give reasonable tuning recommendations.Tuning Advisor is optimized for the execution plan of the input SQL setThe Accsee Advisor is a recommendation on how much performance is improved if SQL set is introduced in
Index | performance
ORA FAQ Performance Tuning Series--
The Oracle (tm) Users ' co-operative FAQ
Why would a reverse index to useful when the leading column of the "index is" generated from a sequence?
When the first column of the index is generated by the sequence, what is the use of a reverse index?
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Tags: base conferencing method technology and services COM CTF Research: Network Disk DownloadOracle Database 10g Performance Tuning and optimization provides a way to monitor, analyze, and optimize Oracle database 10g, built by Oracle Certified Master Richard J.niemiec. The book contains detailed case studies, best pr
Label:20 Experience tuning MySQL performance optimizationPublished: February 15, 2012 published by: OurmysqlSource: Web Base is read: 3,354 kills 0 comments This article will introduce you to 20 MySQL performance optimization experience, these little experiences will help you better use MySQL for web development. Today, database operations are increasingly bec
criteria for large-scale and high-traffic performance tuning of Web websites have become the standards for front-end Optimization of Web websites in the industry. Many articles and books at home and abroad have introduced these standards. The 14 Guidelines are actually one of the achievements of Yahoo Performance in t
MySQL performance tuning and Architecture Design-Chapter 1 Data splitting of scalability design and mysql Optimization
Chapter 1 Data splitting for scalable design
Preface The expansion implemented through the MySQL Replication function is always limited by the size of the database. Once the database is too large, especially when writing too frequently, it is difficult to support it by a host, we are still
Article Title: Linux performance monitoring and tuning (CPU ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
In fact, there are many articles on this part on the Internet. Why is this article still available? There are several reasons why it is the motivation of my tra
Performance Tuning Recommendations1. Optimize your query for query cachingMost MySQL servers have query caching turned on. This is one of the most effective ways to improve sex, and this is handled by the MySQL database engine. When many of the same queries are executed multiple times, the results of these queries are placed in a cache so that subsequent identical queries do not have to manipulate the table
MySQL Performance tuning my.cnf detailedHttps://blog.linuxeye.cn/379.htmlProvides a MySQL 5.6 version suitable for MY.CNF profiles on 1GB memory VPS (click here to download the file):
[Client]
Port = 3306
Socket =/tmp/mysql.sock
[Mysqld]
Port = 3306
Socket =/tmp/mysql.sock
Basedir =/usr/local/mysql
DataDir =/data/mysql
Pid-file =/data/mysql/mysql.pid
user = MySQL
bind-address =
Query performance tuning is a big topic, where the technology involved is very broad, but we can generally divide it into the following levels:
1. Reduce data access. The related technique is to create an appropriate index that converts time-consuming operations such as full table scans, index scans (scan), to index lookups (seek). Establish the correct index, can make the database query
, and SQL server database can all display the execution plan of a given statement. I have analyzed in detail the execution plans of these three databases, and there is no essential difference between them. Therefore, the content in this article is suitable for these three databases. Similarly, it should be suitable for the vast majority of other databases.
A deep understanding of Single-Table execution is the basis for understanding the multi-Table execution plan. The DM database displays more i
15 useful MySQL/MariaDB performance tuning and Optimization Techniques
MySQL is a powerful open-source Relational Database Management System (RDBMS ). It was released in 1995 (20 years ago ). It uses Structured Query Language (SQL), which may be the most popular choice in database content management. The latest MySQL version is 5.6.25, which was released on July 25, May 29, 2015.
An interesting fact about M
/comprehensive) --Time_limit (in)-maximum duration in second for tuning --Task_name (in)-Optional tuning Task Name --Description (in)-Maximum of the SQL tuning session description -- --RETURNS: --SQL tuning Task unique Name -- --EXCEPTIONS: --To IS done ------------------------------------------------------------------
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