How to Log Duration Only for Slow Queries in PostgreSQL 11.2 скачать в хорошем качестве

How to Log Duration Only for Slow Queries in PostgreSQL 11.2

Discover how to configure `PostgreSQL` 11.2 to log duration exclusively for slow queries, ensuring efficient performance monitoring and analysis. --- This video is based on the question https://stackoverflow.com/q/74140259/ asked by the user 'Edigest2' ( https://stackoverflow.com/u/8113719/ ) and on the answer https://stackoverflow.com/a/74178803/ provided by the user 'Edigest2' ( https://stackoverflow.com/u/8113719/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions. Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: PostgreSQL log duration only on slow queries Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l... The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license. If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com. --- Logging Slow Query Durations in PostgreSQL 11.2: A Quick Guide As a database administrator or developer, monitoring the performance of your queries is crucial for maintaining the efficiency of your applications. In PostgreSQL 11.2, you might encounter the need to log the duration of only the slow queries, which can help identify bottlenecks without cluttering your logs with unnecessary information. Many users have struggled with finding a straightforward way to achieve this goal. Let’s explore how you can efficiently log slow queries along with their durations in PostgreSQL 11.2. The Problem: Logging Slow Queries Without Duration When attempting to log only the slow queries, you might have tried the following configurations: [[See Video to Reveal this Text or Code Snippet]] In this setup, slow statements are logged, but the duration of how long they took to execute is omitted. Conversely, if you change the settings to include durations: [[See Video to Reveal this Text or Code Snippet]] Now, you observe that the duration of every statement, not just slow ones, is printed in the log. This often leads to an overwhelming amount of log data, making it difficult to pinpoint the performance issues you actually want to investigate. The challenge lies in finding a way to log durations exclusively for slow queries without generating excess data. The Solution: Setting the Right Parameters The key to achieving your logging goals in PostgreSQL is to adjust the parameters correctly, specifically the log_statement parameter. Here's a step-by-step guide on how to do it: Step 1: Set log_statement to none This adjustment is crucial because if log_statement is set to 'all', you will end up logging every single statement, which is not what we want. Change this setting by using the following command: [[See Video to Reveal this Text or Code Snippet]] Step 2: Maintain Required Logging Settings Now, ensure that you keep the following settings active: [[See Video to Reveal this Text or Code Snippet]] Step 3: Verify the Output With the settings configured as indicated above, your PostgreSQL logs should now only include entries for slow queries with their respective execution durations logged right after the prefix. This gives you a clear and concise view of the queries that are taking longer than expected, helping you prioritize optimization efforts. Conclusion By carefully adjusting your PostgreSQL 11.2 settings, you can successfully log only the duration of slow queries, simplifying your log analysis and troubleshooting. Remember to always check the log_statement setting, as it can significantly influence what gets logged. Now you can focus on performance enhancement without sifting through excessive log data. Happy querying!