In PostgreSQL, you can implement “as of” queries using the SQL standard’s temporal query features, which allow you to query a table as it existed at a specific point in time. There are two main […]
The cost of a slow query in PostgreSQL can be estimated by the Query Planner, which uses statistics about the data in the tables being queried to make predictions about the query execution time. The […]
In PostgreSQL, optimizer plan stability is a feature that allows the query planner to reuse a previously cached query plan for a SQL statement instead of generating a new plan. This can improve query performance […]
In PostgreSQL, global indexes are implemented using a shared-nothing architecture, which means that the index data is partitioned and distributed across multiple physical nodes or “shards.” This allows for parallel query processing and improved performance […]
Bloom filters are probabilistic data structures that are used for membership tests. They are particularly useful in databases as they allow faster and more efficient querying of data. In MyRocks, a storage engine based on […]
PostgreSQL provides the option of synchronous replication to ensure that transactions are committed on the standby servers before they are acknowledged as being committed on the primary server. This can provide an added level of […]
MySQL Hot Tables are tables that experience a high volume of traffic and activity, and can quickly become a bottleneck for database performance. When you see higher than expected disk I/O on MySQL Hot Tables, […]
In PostgreSQL, a mutating table error occurs when a row-level trigger tries to modify the same table that the trigger is defined on. This occurs because the database does not allow a query to modify […]
Materialized views in PostgreSQL are useful when you have frequently used queries that are complex, slow, or involve large amounts of data. In such cases, creating a materialized view can significantly improve query performance. A […]
When adding indexes or columns in MySQL, it is important to be aware of the potential for replication to break. One way to prevent this is to use a tool like pt-online-schema-change from the Percona […]
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