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Similarities Between Oracle and PostgreSQL 5 (1)

Similarities Between Oracle & PostgreSQL In this blog, we will compare similarities between Oracle & PostgreSQL in terms of Memory, Process, Files, General architecture, etc. COMPONENTS ORACLE POSTGRESQL Architecture: Memory Shared Global Area (SGA) Shared Memory DB buffer cache Shared buffer Log Buffer WAL (Write Ahead Log) Buffer Private Global Area (PGA) Work Memory Architecture: […]

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Tablespaces in PostgreSQL 0 (0)

Tablespaces in PostgreSQL A tablespace allows superusers to define an alternative location on the file system where the data files containing database objects (such as tables and indexes) can reside. The tablespace name must be distinct from the name of any existing tablespace in the database cluster. PostgreSQL uses a tablespace to map a logical […]

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Vacuum and Autovacuum in PostgreSQL 5 (1)

Vacuum and Autovacuum in PostgreSQL In this article, we will understand the detailed concept of Vacuum & Autovacuum along with practical examples of the same. Vacuum Whenever we run an UPDATE command, the system does not change the actual data, but it inserts new data in reference to the old data and mark the row […]

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Configure WAL Archiving in PostgreSQL 0 (0)

Configure WAL Archiving in PostgreSQL WAL is short for Write Ahead Log. In PostgreSQL terms, copying out generated WAL files is called archiving,If you save a copy of each WAL file that was generated, you could replay back the entire set of changes to another server. Saving all generated WAL files to a safe offline […]

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Postgresql Architecture – Physical Storage Structure 5 (1)

Postgresql Architecture – Physical Storage Structure In this blog, we will discuss PostgreSQL architecture of physical storage which can be categorized in below four part: 1. Data Directory 2. Physical Files 3. Data file layout (OID) 4. Database Structure 1. Data Directory Specifies the directory to use for data storage. This parameter can only be […]

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Postgresql Architecture – Process 0 (0)

Postgresql Architecture – Process In the previous blog, we looked at Memory Components in PostgreSql, Click here to read more. In this post we will discuss the Process of PostgreSQL, Processes in PostgreSQL can be divided mainly into 4 types: 1. Postmaster (Daemon) Process 2. Background (Utility) Process 3. Backend Process 4. Client Process 1. […]

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PostgreSQL Architecture – Memory Components 5 (1)

PostgreSQL Architecture – Memory Components In this post we will discuss Memory Components of PostgreSQL, Memory Components in PostgreSQL can be divided mainly into two category memory region 1). Shared Memory 2). Process Memory or Backend Memory Shared Memory Shared Memory: Shared Memory refers to the memory reserved for database caching and transaction log caching. […]

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Configure another instance of PostgreSql and administer using systemctl 0 (0)

Configure another instance of PostgreSQL and administer using systemctl In the previous post, we saw How to Install PostgreSQL 13 on Linux Using YUM Command. In this blog, we will create another PostgreSQL Server in the same machine and will register the database server in systemctl system manager for easy management. Step 1. Verify first […]

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Schema in PostreSQL 0 (0)

Schema in PostreSQL In PostgreSQL, a schema is a namespace that contains database objects such as tables, views, indexes, data types, functions, stored procedures. A database can contain one or multiple schemas and each schema belongs to only one database. PostgreSQL automatically creates a public schema for every new database. Whatever DB objects are created […]

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Create, Drop, Alter Roles in PostgreSQL 0 (0)

Create, Drop, Alter Roles in PostgreSQL PostgreSQL represents accounts as roles. PostgreSQL uses roles to represent user accounts. It doesn’t use the user concept like other database systems Oracle & MySql. Roles that can log in are called login roles. When roles contain other roles, they are called group roles. When you create a role, […]

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