Learn about PostgreSQL and how you can leverage an open-source relational database management system.
Generally, I expect all the catalog information of a typical PostgreSQL instance to be around 20 MB. The size depends on the number of objects in the database. Databases with many objects (tables, indexes, etc.), such as large numbers of partitioned tables with many partitions, are expected...
Write operations in PostgreSQL can be performed concurrently without the need for read/write locks. Indexes are used to speed up queries when dealing with large amounts of data, which allows databases to find a specific row without having to cycle through all of the data. With PostgreSQL, you...
PostgresSQL supports almost all relational database features and offers a few unusual features that are normally absent in other RDBMS engines. Commonly supported objects include views, stored procedures, indexes, triggers and object-defined data types, in addition to general RDBMS features such as p...
Primary keys are always indexed and unique (the field values cannot be duplicated). Other fields can optionally be indexed. It’s often useful to create indexes for foreign key fields and for fields that appear in WHERE and ORDER BY clauses, although not always, because of the potential over...
features. Although it is SQL compliant where many of the features required by the SQL standard are supported (the latest version of PostgreSQL is 12 at the time of writing confirms to at least 160 of the 179 mandatory features for SQL), there are some slight variations in syntax or ...
Indexesare lookup tables that help speed up database lookup functions. Reportsconsist of data retrieved from one or more tables, usually a subset of that data that is selected based on search criteria. Each column in a table corresponds to a category of data -- for example, customer name or...
This code snippet taken directly fromcostsize.cin the core is basically the only place in the optimizer which takes effective_cache_size into account. As you can see, the formula is only used to estimate the costs of indexes. In short: If PostgreSQL knows that a lot of RAM is around, ...
PostgreSQL Data Corruption Problems Encountered in the Use of SQL Server Poor Design Decisions Indexes Bad Code Object Relational Mapping PostgreSQL vs SQL Server: Which Database should you choose? In conclusion, the decision to choose between PostgreSQL and SQL Server as your database management syst...
Copying tables in binary format may reduce the time spent, depending on column types Indexes other than PK and REPLICA IDENTITY can be used on the subscriber Using REPLICA IDENTITY FULL on the publisher can lead to a full table scan per tuple change on the subscriber when REPLICA IDENTITY or...