pg_proctab: Accessing System Stats in PostgreSQL
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The document provides an overview of pg_proctab, a collection of C stored functions for accessing system statistics in PostgreSQL, including processor time, memory usage, and load averages. It includes examples of SQL queries using pg_proctab functions such as pg_cputime, pg_loadavg, and pg_memusage to retrieve system data. Additionally, it explains how to collect statistics for queries, create custom reports, and monitor remote databases using pg_top.
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A brief introduction to PostgreSQLVu Hung Nguyen PostgreSQL is an open source object-relational database system that has been in development since 1982. It supports Linux, Windows, Mac OS X, and Solaris and can be installed using package managers or installers. PostgreSQL provides many features including procedural languages, functions, indexes, triggers, multi-version concurrency control, and point-in-time recovery. It also has various administration and development tools.
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Filesystem Performance from a Database PerspectiveMark Wong The document discusses filesystem performance from a database perspective, emphasizing the importance of understanding I/O behavior and filesystem testing. It outlines specific testing criteria, hardware configurations, and methodologies employed during testing with various Linux filesystems and RAID configurations. The author highlights the need for individual system testing to gauge performance accurately, recommending that users do not solely rely on external benchmarks.
PostgreSQL Portland Performance Practice Project - Database Test 2 Filesystem...
PostgreSQL Portland Performance Practice Project - Database Test 2 Filesystem...Mark Wong The document discusses the performance evaluation of various Linux filesystems using PostgreSQL and outlines a project conducted at Portland State University. It emphasizes the importance of testing with your own hardware and filesystems, providing detailed results of benchmarks, configuration guidelines, and insights into RAID and I/O performance. The findings highlight that different filesystems and RAID configurations significantly impact performance, and users should consider their specific setups for tuning PostgreSQL effectively.
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PostgreSQL Portland Performance Practice Project - Database Test 2 Series Ove...Mark Wong The document outlines the dbt-2 series covering PostgreSQL performance practices and tuning methodologies at Portland State University. It discusses hardware specifications, workload details, and data statistics, as well as tuning exercises for database optimization. Acknowledgments highlight support from IBM, HP, and Command Prompt, Inc., along with details for upcoming meetings.
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