November 2015
Beginner
464 pages
9h 46m
English
Content preview from Learning PostgreSQLBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Adding missing indexes on foreign keys and altering the default statistic
High performance in PostgreSQL can be achieved by having optimal execution plans and proper indexes. Execution plans depend on the statistics gathered from the tables; fortunately, in postgres, one can control the behavior of the statistic collection.
Getting ready
For a developer, it is important to get good performance. When handling foreign keys, there are two recommendations to increase the performance, which are as follows:
- Always index foreign keys: Indexing a table on a foreign key allows PostgreSQL to fetch data from the table using an index scan.
- Increase the column statistic target on foreign keys: This is also applicable to all predicates because it allows PostgreSQL ...
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