SQL, NoSQL, query optimization and data modeling
105 posts
In the realm of database engineering, creating indexes is often the first line of defense against slow queries. However, for intermediate to advanced developers, the default "create an index on this column" approach is rarely sufficient for high-performance applications. To truly optimize complex...
Choosing the right isolation level in PostgreSQL is often a balancing act between data consistency and system throughput. While READ COMMITTED is the default and offers high performance, it is susceptible to non-repeatable reads and phantom reads. On the other end of the spectrum, the SERIALIZABL...
Multi-Version Concurrency Control (MVCC) is the backbone of modern transactional databases. While it excels at preventing readers from blocking writers and vice versa, it introduces subtle concurrency anomalies like phantom reads and write skew. For engineers building high-concurrency application...
In the modern landscape of distributed systems, ensuring that data remains consistent across various services while maintaining low latency is a critical engineering challenge. Traditional caching strategies often struggle with invalidation storms and stale data issues. Enter Redis Streams: a pow...
For many developers, Redis is synonymous with the Cache-Aside pattern: a quick check in the database, a lookup in memory, and a write-through if missed. While effective for simple read-heavy workloads, modern distributed systems demand more from their caching layer. As applications scale, the nee...
In the realm of modern software architecture, particularly with microservices and high-throughput applications, ensuring data consistency is paramount. When multiple instances of an application attempt to modify the same resource simultaneously, race conditions occur. This can lead to data corrup...
In modern event-sourced architectures, data integrity and traceability are paramount. Traditional relational databases often struggle with the high write throughput and schema flexibility required by event sourcing. Fortunately, PostgreSQL offers a powerful combination of features—specifically th...