Articles by Shiv Iyer

About Shiv Iyer

Open Source Database Systems Engineer with a deep understanding of Optimizer Internals, Performance Engineering, Scalability and Data SRE. Shiv currently is the Founder, Investor, Board Member and CEO of multiple Database Systems Infrastructure Operations companies in the Transaction Processing Computing and ColumnStores ecosystem. He is also a frequent speaker in open source software conferences globally.

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MySQL InnoDB Mutex Waits: Monitoring with Performance Schema in MySQL 8

InnoDB Mutexes are synchronization objects used by the InnoDB storage engine to ensure that different threads can access shared resources safely. Mutex waits can be a bottleneck for performance in MySQL 8, as they can […]

MySQL 8 Group Commit: Optimizing Performance

Comprehensive Guide to Optimizing MySQL 8 Performance with Group Commit: Understanding, Fine-Tuning System Variables, and Monitoring Techniques for Enhanced Throughput and Reduced Disk I/O Overhead Group commit in MySQL 8 is a critical feature that […]

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PostgreSQL Multipass Hash Joins: How to Implement Them

Multipass hash join is a technique used to optimize the performance of a hash join operation in a database management system. In a hash join, one table is used as the build input, and the […]

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Monitoring PostgreSQL Sessions: How to Monitor Live Sessions

In PostgreSQL, you can monitor live sessions using a few different methods: You can use any of these methods to monitor live sessions in PostgreSQL, depending on your needs and the resources available to you. […]

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PostgreSQL Hash Joins: How to Use Them

In PostgreSQL, hash joins are used to join two tables based on a join condition that involves equality comparisons. The optimizer automatically chooses this join method if it determines that a hash join would be […]

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MariaDB Cache Buffer Chains: How They Are Implemented in MariaDB 11

In MariaDB 11, the cache buffer chains (CBC) implementation is part of the InnoDB storage engine. The CBC is a data structure used to manage the InnoDB buffer pool, which is a cache that stores […]

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PostgreSQL Optimizer Index Caching Explained

Optimizer index caching in PostgreSQL is the process by which the database caches the index pages in memory to speed up the execution of queries. This feature helps improve the performance of queries by reducing […]

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PostgreSQL Cardinality: How the Optimizer Behaves When It Is Zero

In PostgreSQL, the optimizer uses cardinality estimates to determine the most efficient execution plan for a query. Cardinality refers to the number of rows in a table or the number of rows returned by a […]

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MySQL Histograms: When MySQL Ignores Them

MySQL can ignore histograms in the query optimizer when it determines that using the histograms would not provide any benefit to the query execution plan. This can occur in several cases, including: Why MySQL ignores […]

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MySQL Mutex Contention: Troubleshooting Guide

Mutex contention occurs in MySQL when multiple threads attempt to access a shared resource, such as a data structure or a system resource, simultaneously. Because only one thread can access the resource at a time, […]

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