postgresql tuning

PostgreSQL tutorial (1): Detailed description of data tables and detailed description of postgresql I. Table definition: For any relational database, tables are the core and basic object units of data storage. Now let's start from here.1. Create a table:Copy codeThe Code is as follows:Create table products (Product_no integer,Name text,Price numeric);2. delete a table:Copy codeThe Code is as follows:Drop ta

PostgreSQL tutorial (14): database maintenance, postgresql tutorial I. Disk Space Restoration: In PostgreSQL, the data rows deleted or updated using the delete and update statements are not actually deleted, the physical address of the old data row sets the row status to deleted or expired. Therefore, when data in a data table changes frequently, the space occupi

PostgreSQL replication cluster overview, PostgreSQL replication Cluster For pg replication, high availability, and load balancing clusters, write an overview for future reference. Pg has the following various replication-Based Cluster solutions, most of which were used, and some were not sorted out at the time. There are also many cluster configuration documents on the Internet. After this document, find a

Mac installs PostgreSQL by default, so that PostgreSQL can be accessed remotelyMac default PostgreSQL directory storage path is /usr/local/var/postgres/ in this directory, modify two files, one is postgresql.conf, one is pg_ Hba.conf, and finally a reboot.Modify Postresql.conflisten_addresses = ' * ' # Modify the configuration here to allow link

Performance Tuning: IO consumption analysis, performance tuning io consumption Performance Tuning-> how to analyze io consumption Reprinted please indicate the source: http://blog.csdn.net/supera_li/article/details/45225077For more information about the performance tuning series, see.Performance Optimization: Analysis

Tags: style c tar ext a intHow to use Oracle's Dbms_sqltune package to run SQL Tuning Advisor for SQL automatic tuning1 ". Here's a simple example of how dbms_sqltune is used.First execute the next SQL that you want to tune, and then get the SqlidSql> SELECT * from V$sqltext where sql_text like ' select * from dual% ';ADDRESS hash_value sql_id command_type PIECE sql_text---------------- ---------- ------------- ------------ ---------- ----------------

ObjectiveIn the previous article we analyzed the role of statistical information in the database, and we have learned how the database uses statistics to control the distribution of the contents of tables in the database. Children's shoes are not clear and can be clicked for reference.As a tuning series of articles, the index of the database is certainly not less, so this article we began to analyze this piece of content, about the basic knowledge of

Tags: upd alt has meaning tab logic for good problem useObjective In the previous article we analyzed the role of statistical information in the database, and we have learned how the database uses statistics to control the distribution of the contents of tables in the database. Children's shoes are not clear and can be clicked for reference. As a tuning series of articles, the index of the database is certainly not less, so this article we began to an

PostgreSQL tutorial (10): Performance Improvement tips and postgresql Performance Improvement 1. Use EXPLAIN: PostgreSQL generates a query plan for each query, because selecting the correct query path has a critical impact on performance. PostgreSQL itself contains a scheduler for optimal planning. We can use the EXPLA

PostgreSQL tutorial (8): Index details, postgresql Index I. Index type: PostgreSQL provides multiple index types: B-Tree, Hash, GiST, and GIN. Because they use different algorithms, each index type has a suitable Query type, the create index Command creates a B-Tree INDEX.1. B-Tree:Copy codeThe Code is as follows:Create table test1 (Id integer,Content varchar);Cr

PostgreSQL introduction, postgresqlPostgreSQL Introduction: PostgreSQL is a relational database management system in the industry. It is applicable to various Linux operating systems, Windows, Solaris, BSD, and Mac OS X. PostgreSQL follows the BSD license and is an open-source software. As the fourth largest relational database service in the world,

Http://www.360doc.com/content/14/1208/13/16070877_431273418.shtmlUse JMeter to stress test tomcat and Tomcat performance tuningNginxtomcat Throughput Research ReportHttp://wenku.baidu.com/link?url= Fmp1sd8qbi87s23kei5nbek7mpjr-mwbte-pb4bn4iyqn1vqoagkig7bbnn5csmryhye4skxyoc5emjukc1gwqxnbgxsvrthadaxbcannf3Http://www.open-open.com/lib/view/open1401931407228.htmlIntroduction to JMeter's articlesHttp://www.cnblogs.com/TankXiao/p/4045439.htmlView JMeter Aggregation Tree ResultsTuning Series-tomcat

FineReport performance tuning methods, finereport Performance TuningThe basic idea of FineReport performance optimization is to properly set the memory size of the application server. Generally, the default memory configuration of the server is relatively small. In larger application projects, this memory is not enough. Therefore, you need to increase the memory size during processing. The memory configuration methods for each application server are d

First, diagnostic tools 1. Warning Log file Warning log files contain system information and error logs that contain important errors (such as: ORA-600) and block checksum error messages (ora-1578,ora-1498). Monitor database operations such as CREATE DATABASE, STARTUP, SHUTDOWN, ARCHIVE log, and RECOVER, and record Non-default initialization parameter values. When Log_checkpionts_to_alert is set to true, the warning log file also records the start and end times of checkpoints, incomplete checkpo

Tags: Parent extension nbsp Different operation modes view materialized view commands: Network Disk DownloadContent Profile ...This book will help you understand and use the PostgreSQL open source database system. Not only will you learn about enterprise features in versions 9.2, 9.3, and 9.4, but you'll also find that PostgreSQL is not just a database system, but also an excellent application platform. Thi

Linux memory basic knowledge and related tuning solutions, linux TuningMemory is one of the important components in the computer and serves as a bridge to communicate with the CPU. All programs in the computer run in the memory, so the memory performance has a great impact on the computer. Memory is used to temporarily store computing data in the CPU and data exchanged with external memory such as the hard disk. As long as the computer is running, the

Sysctl. conf for learning and tuning, and sysctl. conf for tuning Reproduced in the short book: sysctl. conf learning and tuning. If you have any version problems, please contact mePreface Remember the first contact/etc/security/limits.confAnd/etc/sysctl.confThis is because kernel parameters must be modified as needed during Oracle deployment. The limits. conf fi

MYSQL Enterprise common architecture and tuning experience sharing, mysql tuning Experience Sharing 1. Select Percona Server, MariaDB or MYSQL Mysql application source: http://www.jinhusns.com/Products/Download? Type = xcj 1. Three storage engines of Mysql MySQL provides two storage engines: MyISAM and InnoDB, MySQL4 and 5 using the default MyISAM storage engine. From MYSQL5.5, MySQL has changed the defaul

The individual believes that JVM tuning is primarily addressed by the following methods1. Set the appropriate maximum heap memory (maximum and value for Cenozoic and Laosheng generations) and minimum heap memory (the operating system memory size consumed by JVM startup), and set the scale allocation of the heap.2, set up the suitable new generation because of its impact on the system performance and GC recovery has a certain effect.3. Set the appropri

MySQL performance tuning and Architecture Design-the idea and solution of the High Availability design in Chapter 17th, mysql Tuning Chapter 1 High Availability design ideas and solutions Preface: The database system is the core part of an application system. To ensure the overall availability of the system, the database system cannot have any problems. For an enterprise-level system, the availability of th