POSTGRESQL Deep Architecture Topics
Explore low-level database engine internals: buffer pools, kernel page cache interplay, WAL/redo mechanics, MVCC concurrency, and high availability consensus.
PostgreSQL Shared Buffers & Linux Page Cache Interaction: The Hidden Layer of Memory Management
Comprehensive architectural guide on how PostgreSQL shared_buffers and Linux OS page cache interact, buffered I/O execution pipeline, double caching mechanics, cache hit ratio realities, and dual-layer tuning.
PostgreSQL WAL Architecture, Full Page Writes & Checkpoint Spreading Optimization
Comprehensive technical guide on PostgreSQL WAL architecture, Full Page Writes (FPW), checkpoint spreading via checkpoint_completion_target, and high-write tuning.
PostgreSQL Autovacuum Tuning & XID Wraparound: Preventing the 2-Billion Transaction ID Crisis
Comprehensive architectural guide on PostgreSQL Autovacuum internals, 32-bit transaction ID (XID) aging, tuple freezing, anti-wraparound vacuum mechanics, production capacity planning, and incident runbooks.
InnoDB Buffer Pool Sizing, Chunk Allocation & Dirty Page Flushing
Deep dive into innodb_buffer_pool_size, dynamic chunk resizing, LRU lists and adaptive hash indexes.
MySQL Group Replication (MGR) Paxos Consensus & Network Partitioning
How MGR guarantees zero data loss using Corosync/Paxos and prevents split-brain during node failures.
SQL Server Always On Read-Only Routing & Secondary Replica Latency
Load balancing read queries across secondary replicas using ApplicationIntent=ReadOnly and diagnosing redo queue lag.
SQL Server Query Store: Automated Plan Regression Detection & Plan Forcing
Pinning performant execution plans with sp_query_store_force_plan to permanently eliminate parameter sniffing outages.