postgresql tuning

Label:2.3 Understanding consistency and data lossIt is not possible to mine PostgreSQL transaction logs without regard to consistency. In the first part of this chapter, we have largely explained the basic idea of the transaction log. You already know that the ability to make data in a good shape without prior log changes is difficult or even impossible. So far, most of us have been discussing the problem of collapse. It is absolutely not good to lose

Install and configure PostgreSQL 9.4.3 in CentOS 6.5 I. IntroductionPostgreSQL is a very complex object-relational database management system (ORDBMS). It is also currently the most powerful, feature-rich and complex free software database system. Some features are not even available in commercial databases. This database research program originated from Berkeley (BSD) has now been developed into an international development project and has a wide ran

Reprinted from http://zhenghaoju700.blog.163.com/blog/static/13585951820116782843994/Install a PostgreSQL first (see Supplemental knowledge)Compare Oracle PL/SQLDbms_output.put_line ("This is a log") in PL/SQL; Simple commissioning is possibleOf course our PostgreSQL also has the corresponding function RAISE NOTICE ' This is a log% ', param;% placeholder param replacement ValueRAISE There are other levels d

(if needed) various typical hardware projects in the IT organization. Understanding the tcp OS layer, dividing the network into subnets, tuning the firewall, and so on. Many DBAs only have the skills to manage, monitor, and optimize databases. However, PostgreSQL also considered the OS tool during its construction. Of course, few DBAs are proficient in all disciplines, but these knowledge enables

3.3 Do the basic backupIn the previous section, you have seen that enabling archiving requires only a few lines of command and provides great flexibility. In this section, we will see how to create a so-called base backup, which can be used later with Xlog. A basic backup is a copy of the original data.[Keep in mind that Xlog itself is of no value.] It is only useful when combined with the initial backup. ]In PostgreSQL, there are two main choices to

business results Library TDW has no standard JDBC, ODBC interface and is difficult to dock with commercial tools TDW processing small data, doing update and delete inefficient Solution TDW is not omnipotent, it is impossible to meet all the application scenarios Need to build a set of RDBMS as a complement to TDW To facilitate the user to migrate existing business, do have tools to do migration To have a standard JD

This document describes how to install the software in Gentoo Linux by using postgreSQL as an example, and summarizes the USE flag. 1. Run emerge-pv postgresql-server to check the USE [Plain]View plaincopyprint? # Emerge-pv postgresql-server These are the packages that wocould be merged, in order: Calculating dependencies... done! [Ebuild N] dev-db/

Label: There are no problems in the reading process. Welcome to communicate together Email:[email protected] qq:1494713801 One, PostgreSQL time type conversion --Convert time type to character type Select To_char (current_date, ' yyyy/mm/dd '); Select To_char (current_date, ' yyyy-mm-dd '); Select To_char (now (), ' yyyy-mm-dd '); Select To_char (current_timestamp, ' HH:MI:SS '); Select To_char (Current_timestamp, ' yyyy/mm/dd HH:MI:SS '); --Convert

This article is the third of the GC expert series. In the first understanding of Java garbage Collection, we learned several different GC algorithm processing processes, the way GC works, the difference between the new generation and the old age. So, you should have known about the 5 GC types in JDK 7, and the performance impact of each GC.The second monitoring of Java garbage collection describes how the JVM runs the GC in real-world scenarios, how to monitor GC data, and what tools are availab

InnoDB is set to the prefix index (n bytes before the string). The possible cause isCHAR(32)Only the first 16 bytes indexes are supported. PostgreSQL's Partial Indexes has benefited from many aspects and is even larger. Because Indexes on Expressions exists, you can also index suffix, or even the value obtained by the index through the string function, in addition to the prefix index of MySQL. For example, PostgreSQL can set "I only need to index t

Postgresql installation and common error handling I. Installation instructions recently, due to business needs, I abandoned the mysql database that I have been using and started to switch to the postgresql database. Why should I choose postgresql? It must be that postgresql is more powerful than mysql. For the advantag

PostgreSQL is an open-source SQL database that supports standard SQL and allows users to connect to PostgreSQL via the JDBC driver for application development. The user extends the PostgreSQL function, allowing the developer to access the SEQUOIADB database using SQL statements to complete the SEQUOIADB database, delete, check, and change operations. This paper i

How to install, configure, and use PostgreSQL I. Introduction to PostgreSQL 1. What is PostgreSQL? PostgreSQL database is currently the most powerful open-source database and supports a wide range of data types (such as JSON, JSONB, and array types) and custom types. Moreover, it provides a variety of interfaces that c

Typically, when using a feature service, the user requires that the data be stored in a spatial database. At the same time, you need to register the database with ArcGIS for Server so that you do not need to copy the data when you publish the service, which saves disk space and service release time. The following summarizes how the PostgreSQL database is used in desktop and server products on the ArcGIS platform, including the Linux version of ArcGIS

Tags: Star ref note + + limit base min ant into1, Preface: SQL Tuning has been the DBA of the more laborious technology, and many DBAs if not engaged in the development of the work, then tuning is a headache work, even if the SQL tuning is a strong master, in the process of SQL tuning to constantly analyze the executio

Install the open source database PostgreSQL 9.4 and phpPgAdmin on UbuntuIntroduction PostgreSQL is a powerful, open-source, and Object-based relational database system. It supports all mainstream operating systems, including Linux, Unix (AIX, BSD, HP-UX, sgi irix, Mac OS, Solaris, Tru64) and Windows operating systems. The following is an evaluation of PostgreSQL

First, IntroductionPostgreSQL is a very complex object-relational database management system (ORDBMS), and is currently the most powerful, feature richest and most complex free software database system. Some features don't even have a commercial database. The Berkeley-based database research program has now become an international development project and has a very wide range of users.Second, the system environmentSystem Platform: CentOS Release 6.3 (Final)P