KKKrishna Kumar Mahtoinkrishnakrmahto.hashnode.dev·Jul 20 · 3 min readReading Markdown Should Feel Like ReadingMarkdown has become the default format for technical content. We read it everywhere. Project READMEs Design documents AI-generated documentation API documentation Meeting notes Personal notes 00
KKKrishna Kumar Mahtoinkrishnakrmahto.hashnode.dev·Apr 15 · 4 min readIf AI Writes Code, Where Do Guardrails Live - a ConjectureGuardrails in software engineering are often misunderstood. Most engineers associate guardrails with: null checks validations defensive coding That is only a small part of the story. A more accur00
KKKrishna Kumar Mahtoinkrishnakrmahto.hashnode.dev·Oct 14, 2025 · 7 min readUnderstanding Garbage Collection (GC) and Stop-The-World (STW) in the JVMThis guide explains — step by step — how the JVM’s garbage collector actually works.We’ll start from how memory is structured (Eden, Survivor, Old), move to what happens during a Minor GC, then see what Stop-The-World (STW) really means, and finally ...00
KKKrishna Kumar Mahtoinkrishnakrmahto.hashnode.dev·Sep 18, 2025 · 5 min readWrite-Ahead Logging (WAL) in PostgreSQL: How It WorksPostgreSQL guarantees durability using Write-Ahead Logging (WAL). WAL ensures that once a transaction is committed, its changes survive crashes, even if the actual table or index pages were never written to disk at the time of failure. This article g...00
KKKrishna Kumar Mahtoinkrishnakrmahto.hashnode.dev·Sep 16, 2025 · 5 min readHow PostgreSQL VACUUM Works: Dead Tuples, FSM/VM, and LockingPostgreSQL uses MVCC (Multi-Version Concurrency Control).Each UPDATE inserts a new row version (xmin = current XID) and marks the old one dead (xmax = current XID).Each DELETE marks the row dead by setting xmax. Dead tuples remain on disk, still refe...00
