PostgreSQL 16 Administration Cookbook Solve real-world Database Administration challenges with 180+ practical recipes and best… (Gianni Ciolli, Boriss Mejías etc.)（Z-Library）

# PostgreSQL 16 Administration Cookbook ## 【One-Line Pitch】 A practical, recipe-driven desk reference for PostgreSQL database administrators covering everything from first steps and configuration to security, performance tuning, replication, and high availability—with 180+ solutions updated for PostgreSQL 16. Ideal for DBAs who want concrete answers to real-world problems without wading through theory. ## 【Book Arc】 - **Opening (~0%–9%)**: Introduces the book's structure and the recipe format (Getting ready, How to do it, How it works, There's more), then covers PostgreSQL fundamentals—installation, first connection, and essential tools like psql and pgAdmin 4. - **Early (~9%–25%)**: Moves into day-to-day administration basics: secure password management with SCRAM-SHA-256, connecting to cloud/DBaaS offerings like EDB BigAnimal, and exploring the database server environment—versions, uptime, file locations, and system identifiers. - **Early (~25%–34%)**: Dives into database inspection and diagnostics: locating and interpreting server logs, measuring memory usage with shared buffers and pg_buffercache, tracking disk space, and working with extensions. - **Middle (~34%–47%)**: Covers server configuration and control—understanding pg_settings to find non-default parameters, managing extension dependencies with CASCADE, emergency server stops, multitenancy design decisions (databases vs. schemas), and setting up PgBouncer connection pooling across multiple servers. - **Middle (~47%–end of excerpts)**: Addresses data quality and performance: identifying and removing duplicate rows, simplifying complex queries, speeding up queries without rewriting them (work_mem, indexes, fillfactor), forcing index usage, parallel query, and JIT compilation. ## 【Key Takeaways】 - **Recipe format is the core structure** (Early): Every solution follows a consistent pattern—Getting ready, How to do it, How it works, There's more—making it easy to scan for answers and understand both the steps and the underlying mechanics. - **Security starts with password encryption** (Early): Use SCRAM-SHA-256 instead of the older, compromised MD5; the \password command in psql sends an already-encrypted string to the server, so plaintext never crosses the wire. - **Logs are your first diagnostic tool** (Early): The server log records messages with severity levels (LOG, FATAL, PANIC); you can control verbosity via log_min_messages, log_error_verbosity, log_line_prefix, and log_destination (stderr, csvlog, syslog, eventlog). - **pg_settings reveals your actual configuration** (Middle): Query pg_settings filtering for non-default values to see what's really been changed and where (sourcefile, sourceline); SHOW alone doesn't tell you whether a parameter differs from its default. - **Extensions have dependencies** (Middle): Use CREATE EXTENSION ... CASCADE to install required dependencies automatically; DROP EXTENSION will fail with a clear error if other objects depend on it, and CASCADE handles cleanup. - **Multitenancy requires deliberate design** (Middle): Choose between separate databases, schemas, or other isolation strategies based on security needs and future cross-analytics; note that separating tables into different databases prevents joins across them. - **PgBouncer enables connection reuse and multi-server access** (Middle): One PgBouncer instance can connect to databases on different hosts and even different PostgreSQL major versions—just configure connection strings in pgbouncer.ini. - **Performance tuning is often about targeted adjustments** (Middle): Speeding up queries without rewriting them involves increasing work_mem, setting recursive_worktable_factor, using indexes wisely, setting fillfactor for frequently-updated tables, and leveraging parallel query and JIT compilation. ## 【Reading Tips】 - **Skim the "How it works" sections first** if you're short on time—they explain the underlying mechanics and help you generalize the recipe to your own situation. - **Deep-read the security and multitenancy chapters** (around 6%–9% and 44%–47%): these involve design decisions with long-term consequences, not just quick fixes. - **Use the "There's more" sections as a springboard** for exploration—they often point to related recipes and advanced variations worth knowing. - **Pay attention to the psql meta-commands** (\d, \x, \timing, \copy, \if, etc.)—they're scattered throughout and form a powerful toolkit for daily work. - **The excerpts don't cover later chapters** on replication, upgrades, monitoring, or Kubernetes/Ansible deployment—consult the full book for those topics. ## 【Coverage Limits】 This guide is based on excerpts covering roughly the first half of the book (through ~47%). Later chapters on replication, high availability, monitoring, logging, and running PostgreSQL on Kubernetes or with TPA/Ansible are mentioned in the book description but not covered in the available material. ##