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Correlation of PostgreSQL columns explained
After you ANALYZE a PostgreSQL table to collect value distribution statistics, you will find the gathered statistics for each column in the pg_stats system view. This article will explain the meaning of the correlation column and its impact on index scans. Physical vs. logical ordering Most common PostgreSQL data types have an ordering: they support […]
Next feature release for the pgwatch2 monitoring tool
With summer fading away it’s time to get busy again – last couple of weeks I’ve taken time to work on our Open Source PostgreSQL monitoring tool pgwatch2 and partly on request from a couple of bigger organizations using the tool on a larger scale, added another batch of useful management / scaling features and […]
PostgreSQL: Parallel CREATE INDEX for better performance
PostgreSQL will shortly be released and it is therefore time to take a look at one of the most important new features provided by PostgreSQL 11: The ability to create indexes in parallel. For many years various commercial database vendors have already offered this feature and we are glad that PostgreSQL has become part of […]