PostgreSQL is a powerful, feature-rich, open source database management system with an active development. It’s a complex piece of software, it has earned a strong user base for reliability, performance and robustness.
Introduction to PostgreSQL 9.6
PostgreSQL is an advanced Sequel database server, It is distributed on a wide range of platforms. It has a permissive license to use, install and distribute without paying any fee as it is an open source platform. It is widely known as a database that can perform for long timespan and requires a little or no maintenance in some cases. Considering all these factors it can be labelled as a platform with a low cost of ownership.
Main features of PostgreSQL:
- It is highly extensible and configurable for various types of applications.
- Excellent performance and scalability with extensive tuning features.
- It supports for different kinds of data models which include post-relational, relational, key/value and document (XML and JSON).
- It outperforms with excellent SQL standard compliance up to SQL:2011.
How is PostgreSQL different?
This project focuses primarily on these objectives:
- High-quality, robust software with manageable, well-commented code.
- The administration has a low maintenance for both enterprise and embedded use.
- Standards-compliant SQL, compatibility Performance, interoperability, high availability and security.
This platform surprises many people as it has PostgreSQL’s feature set which is more comparable with SQL Server and Oracle than it is with MySQL. The unique similarity between PostgreSQL and MySQL is that these two projects are open source, the philosophies and features are almost different.
It is highly extensible, so you can add own operators, data types functional languages and index types. You also have the advantage to override various parts of the system using plugins to add a new optimizer or altering execution of commands.
This open source platform is a high-quality, robust software, supported by automated testing for both concurrency and features. By default, the DB provides disk-write and the developers handle the risk against the data loss very seriously in everything they do.
Many options for trading robustness for performance exist, even they are not defaultly enabled.
Ease of use
Clear, full, and accurate documentation exists as a result of a development process where doc changes are required. Hundreds of small changes occur with each release that smooth off any rough edges of usage, supplied directly by knowledgeable users.
- It works in a similar way on both large and small systems and across operating systems.
- Drivers and Client access exist for every language and environment, so there is no restriction on choosing the development environment now or in the future.
- SQL standard is observed very closely; there is no strange behaviour, like silent truncation of data.
The text data is supported through a single data type that allows storage of anything from one byte to one gigabyte. This storage is optimized in multiple ways, so one byte is stored efficiently, and much larger values are automatically managed and compressed.
PostgreSQL has a clear policy to minimize the number of configuration parameters, and with each release, we work out ways to auto-tune the settings.
Access to PostgreSQL is controllable via host-based accessibility rules. Authentication is pluggable and flexible, permitting easy integration with any outside security architecture.
Full SSL-encrypted accessibility is supported. A full-length cryptographic function library is present for users of the database.
It offers role-based access privileges to access information, by command type. PostgreSQL also provides Row Level Security for solitude, health and military grade protection.
PostgreSQL was designed to be extremely extensible. Database extensions may be loaded easily with CREATE EXTENSION, which automates dependencies, version checks along with other sources of configuration.
PostgreSQL supports user-defined operators, data types, indicators, and more languages. Many extensions are offered for PostgreSQL, including the PostGIS extension that offers world-class Geographical Information System (GIS) attributes )
Performance and concurrency
PostgreSQL 9.6 can reach greater than one million reads per second on a 4 socket server, and it benchmarks at greater than 30,000 write transactions per second with full durability.
PostgreSQL is equipped with an advanced optimizer that considers a wide selection of join types, using user information statistics to direct its selections. PostgreSQL provides the widest range of index kinds of any commonly available database server, fully supporting all information types.
SQL and NoSQL
PostgreSQL follows the SQL Standard very closely. SQL itself doesn’t induce any particular sort of model to be used, therefore PostgreSQL can easily be used for many varieties of models at the exact same time, in the exact same database.
With PostgreSQL acting as a relational database, we might use any level of denormalization, from the full Third Normal Form, to the normalized Star Schema models. PostgreSQL extends the relational model to supply arrays, row types, and range types.
A document-centric database is also possible with PostgreSQL’s text, XML, and binary JSON (JSONB) information types, supported by indicators optimised for documents and by full-text search capabilities.
When MySQL was taken over by a commercial database vendor some years back, it was agreed in the European monopoly security measures that followed that PostgreSQL was a viable competitor. That’s always been true, with the PostgreSQL user base expanding consistently for more than a decade.
Many polls have indicated that PostgreSQL is the preferred database for constructing new, enterprise-class applications. The PostgreSQL feature set gains serious users who have important applications. Financial services companies can be PostgreSQL’s largest user group, even though authorities, telecommunication companies, and a lot of other segments are strong users as well. This popularity extends around the world; Japan, Ecuador, Argentina, and Russia have very large user groups, and thus do United States, Europe, and Australasia.
The scaling feature with PostgreSQL 9.6 performs on a single node up to 4 CPU sockets. It can scale hundreds of active sessions well, and to an extent of thousands of connected sessions while using a session pool. Future scalability is obtained in every annual release. Multi-node read scalability is enabled through the Hot Standby feature.
Most of the users comment that there needs to be a strong commercial support for enterprises before they can invest in an open source technology. Strong support is provided worldwide from a number of companies.
How to get PostgreSQL Software
This software can be altered, used and redistributed in any way you need as it is an open source software. This software is totally free of cost and is already being used by many various application packages. If you are not having the copy yet, you can get the downloads of binary packages or source code for a wide variety of operating systems from here: https://www.postgresql.org/download/.