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Aktuelles aus dem Cybertec PostgreSQL-Blog
Prewarming PostgreSQL I/O caches
PostgreSQL uses shared_buffers to cache blocks in memory. The idea is to reduce disk I/O and to speed up the database in the most efficient way possible. During normal operations your database cache will be pretty useful and ensure good response times. However, what happens if your database instance is restarted – for whatever reason? […]
What is autovacuum doing to my temporary tables?
Did you know that your temporary tables are not cleaned up by autovacuum? If you did not, consider reading this blog post about PostgreSQL and autovacuum. If you did – well, you can still continue to read this article. Autovacuum cleans tables automatically Since the days of PostgreSQL 8.0, the database has provided this miraculous […]
How PostgreSQL estimates parallel queries
Parallel queries were introduced back in PostgreSQL 9.6, and the feature has been extended ever since. In PostgreSQL 11 and PostgreSQL 12, even more functionality has been added to the database engine. However, there remain some questions related to parallel queries which often pop up during training and which definitely deserve some clarification. Estimating the […]