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.

PostgreSQL synchronous_commit and Synchronous Standby Replication: How to Implement

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 […]

Disk I/O MySQL: Explaining Higher Than Expected I/O on Hot Tables

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, […]

Avoid PostgreSQL Mutating Table: How to Prevent It

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 […]

PostgreSQL Materialised Views: How They Work

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 […]

How to prevent Replication Break in MySQL while adding INDEX/COLUMN using PT-OSC (pt-online-schema-change)?

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 […]

MySQL 8 Metadata Locks: How Contention Was Reduced

MySQL 8 introduced several improvements to reduce contention for metadata locks, which are locks that are used to manage access to database objects such as tables and indexes. Here are a few ways in which […]

MySQL 8 Invisible Indexes: How They Work in Practice

In MySQL 8, invisible indexes are a feature that allows you to create an index without it being used by the optimizer. This can be useful in situations where you want to test the impact […]

PostgreSQL Hard Parsing: When Optimization Takes More Time

In PostgreSQL, hard parsing optimization typically takes more time when a query is submitted for the first time or when the database statistics or query planner configuration has changed significantly. This is because hard parsing […]

PostgreSQL Process Global Area: Tuning Guide

In PostgreSQL, the process global area (PGA) is managed by the server’s memory allocator and is used to store data structures associated with each client’s session, such as query plans and sorts. To tune the […]

PostgreSQL Redo Log: Can You Turn Off Generation?

No, it is not possible to turn off redo log generation in PostgreSQL, as it is a fundamental part of the transactional system that ensures the durability and consistency of your data. The redo logs […]

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