postgresql optimization

Source: amutu. comblog201306hive-metastore-db-postgresqlHIVE metadata uses derby as the storage DB by default, derby as the lightweight DB, it is more convenient to use in the development and testing process, but in the actual production environment, ease of use, Disaster Tolerance, stability, and various monitoring and Operation Source of this article: http://amutu.com/blog/2013/06/hive-metastore-db-postgresql/ HIVE metadata uses derby as the storage

Rails comes with a zero-configuration sqlite by default. This feature is OK for development, but cannot be written concurrently. It is not suitable for production. Let's start from scratch. P.S.: deploy postgresql Based on ubuntu server ================ Install postgresql and start it ====================== First install postgresql in ubuntu sudo apt-get instal

Implement PostgreSQL failover in CentOS 6.5 Pgpool-II is an intermediate component that works between the PostgreSQL multi-server and the PostgreSQL Data Warehouse client. It provides the following functions: Connection Pool: pgpool-II is used to save and connect to the PostgreSQL server and reuse new connections with

0, password file: Before giving other PostgreSQL client commands, we need to introduce the password file in PostgreSQL. The file is explained here in advance because we are applying the file in a lot of the following sample code to ensure that our scripts are automated. In other words, if the file is not supplied when the client command executes, all client commands for

think that the identifier foo, foo, "foo" is an equivalent PostgreSQL name, but "foo" and "foo" is different from the above three and between them. PostgreSQL always converts unquoted names to lowercase, which is incompatible with the SQL standard, and the SQL standard requires names that are not enclosed in quotation marks to always be capitalized. Therefore, according to the standard,foo equals "foo " bu

tl;dr: Don ' t ever set Fsync=off, don ' t kill-9 The postmaster then deletepostmaster.pid, don ' t run PostgreSQL on network file systems.Reports of database corruption on the PostgreSQL mailing list is uncommon, but hardly rare. While a few data corruption issues has been found in PostgreSQL over the years, the vast majority of issues is Caused by: Ad

There are a variety of Installation manuals for each platform to be installed. You can search for details in google. Here is the Installation Method On debian, ubuntu class: aptitudeinstallpostgresql # This is the database aptitudeinstallpgadmin3 # This is the management tool on the GUI. Here the debian machine (172.16.70.175) is my notebook and I need it There are a variety of Installation manuals for each platform to be installed. You can search for details in google. Here is the debian instal

In this article, we will focus on another option, the open source database named PostgreSQL. Although MySQL is a fast, powerful, and fairly simple relational database management system, PostgreSQL is more comprehensive and sacrifices some speed for this complexity. If you are used to using interfaces that contain various icons and shortcuts, PostgreSQL is very s

Goodbye to MongoDB, hello PostgreSQL Olery was founded almost five years ago. It started with the single product (Olery Reputation) developed by Ruby proxy. Over time, we began to work on a series of different products and applications. Today, our products include not only (Olery) Reputation, but also Olery Feedback, Hotel Review Data API, and widgets, which can be embedded into websites and more products/services in the near future. We have increased

, supports foreign keys, and also supports burst repair capability and concurrency control. If the integrity of things requires a high level of concurrency notification, then choosing the InnoDB storage engine has the advantage. You can also select the storage engine if you need frequent updates, deletions, because the storage engine can implement the commit and rollback of things. (So things are more demanding in real time) (3) Memory storage Engine: Memories Storage Engine provides an "in-the-

Label:Under Mac, you can use homebrew to install PostgreSQL directly: Brew Install Postgresql-v For a moment, PostgreSQL will be installed. Next is the initial database, execute the command at the terminal, and initially configure PostgreSQL: initdb/usr/local/var/postgres-e UTF8 The above specifies that "/usr/local/var

In this article, we use MySQL4.0.2-alpha and PostgreSQL7.2 for comparison, because MySQL4.0.2-alpha starts to support the transaction concept, so this comparison should be more advantageous for MySQL. We do not want to be just a performance test report, because at least from my perspective, the stability and speed of a database do not represent PostgreSQL. In this article, we use MySQL 4.0.2-alpha to compare with

This is a creation in Article, where the information may have evolved or changed. How do I apply the PostgreSQL function and the trigger in Golang? The trigger in PostgreSQL is a simple but powerful mechanism that reacts to the changes that are taking place in the table. The following describes how to write a PostgreSQL trigger in Go.

Tags: get reason post problem extends Java RAC for SIGFirst, the summaryThe current project was originally based on Oracle development and is now being ported to PostgreSQL. Given that JPA has been used to achieve object persistence, the leader has always thought that the migration task is easy, but there are still a lot of problems in the actual process. Some of these problems are caused by nonstandard definitions of EJBS, such as mapping number (1)