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Baldwin Apps Home Apps Books About Press Contact PostgreSQL · Index diagnostics · DBA-022 How to Find Missing and Unused Index Candidates in PostgreSQL Use scan statistics to build an investigation list, then validate candidates against query plans and real workload patterns. Baldwin Apps SQL Guides · PostgreSQL 15+ · Read-only diagnostic The short answer… Continue reading How to Find Missing and Unused Index Candidates in PostgreSQL

Baldwin Apps Home Apps Books About Press Contact PostgreSQL · Execution plans · DBA-021 How to Read an EXPLAIN Query Plan in PostgreSQL Understand scan types, row estimates, join operators and the important difference between EXPLAIN and EXPLAIN ANALYZE. Baldwin Apps SQL Guides · PostgreSQL 15+ · Plan inspection; execution has workload implications The short… Continue reading How to Read an EXPLAIN Query Plan in PostgreSQL

Baldwin Apps Home Apps Books About Press Contact PostgreSQL · Session intervention · DBA-017 How to Cancel a Query or Terminate a Session in PostgreSQL Identify the exact backend, cancel the current statement first, and escalate to disconnecting a session only when necessary. Baldwin Apps SQL Guides · PostgreSQL 15+ · Operational intervention; review before… Continue reading How to Cancel a Query or Terminate a Session in PostgreSQL

Baldwin Apps Home Apps Books About Press Contact PostgreSQL · Troubleshooting · DBA-018 How to Find Blocking Sessions in PostgreSQL When PostgreSQL queries suddenly hang, find the waiting session, identify its blocker, and trace the chain before taking action. Baldwin Apps SQL Guides · PostgreSQL 15+ · Read-only diagnostic The short answer Query pg_stat_activity and… Continue reading How to Find Blocking Sessions in PostgreSQL

Baldwin Apps Home Apps Books About Press Contact PostgreSQL · Connection pressure · DBA-020 How to Diagnose Too Many Connections in PostgreSQL Measure connection use, locate application pools holding sessions, and investigate connection errors without guessing. Baldwin Apps SQL Guides · PostgreSQL 15+ · Read-only diagnostic The short answer Compare current client sessions with max_connections,… Continue reading How to Diagnose Too Many Connections in PostgreSQL

Baldwin Apps Home Apps Books About Press Contact PostgreSQL · Lock inspection · DBA-019 How to Inspect Waiting and Granted Locks in PostgreSQL Inspect PostgreSQL lock modes, identify requests that are waiting, and understand which lock details matter during an incident. Baldwin Apps SQL Guides · PostgreSQL 15+ · Read-only diagnostic The short answer Query… Continue reading How to Inspect Waiting and Granted Locks in PostgreSQL

Baldwin Apps Home Apps Books About Press Contact PostgreSQL · Performance diagnosis · DBA-016 How to Find Long-Running Queries and Transactions in PostgreSQL Identify statements running longer than expected and transactions left open long after their last query ended. Baldwin Apps SQL Guides · PostgreSQL 15+ · Read-only diagnostic The short answer Use pg_stat_activity to… Continue reading How to Find Long-Running Queries and Transactions in PostgreSQL