November 2015
Beginner
464 pages
9h 46m
English
In addition to the PostgreSQL catalog, there are several tools and extensions that provide monitoring information, such as pg_stat_statements, which shows statistics about the queries executed in the database server, and pg_buffercache, which is used to get deeper insight into caching.
The PostgreSQL catalog contains meta information about PostgreSQL databases and objects. This information can be retrieved and manipulated using SQL statements. However, it is not recommended to manipulate the data directly in a catalog schema. Also, a more user friendly version of this meta information can be found in the information_schema schema.
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