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PostgreSQL 10 High Performance

PostgreSQL 10 High Performance

By : Enrico Pirozzi
2.5 (2)
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PostgreSQL 10 High Performance

PostgreSQL 10 High Performance

2.5 (2)
By: Enrico Pirozzi

Overview of this book

PostgreSQL database servers have a common set of problems that they encounter as their usage gets heavier and requirements get more demanding. Peek into the future of your PostgreSQL 10 database's problems today. Know the warning signs to look for and how to avoid the most common issues before they even happen. Surprisingly, most PostgreSQL database applications evolve in the same way—choose the right hardware, tune the operating system and server memory use, optimize queries against the database and CPUs with the right indexes, and monitor every layer, from hardware to queries, using tools from inside and outside PostgreSQL. Also, using monitoring insight, PostgreSQL database applications continuously rework the design and configuration. On reaching the limits of a single server, they break things up; connection pooling, caching, partitioning, replication, and parallel queries can all help handle increasing database workloads. By the end of this book, you will have all the knowledge you need to design, run, and manage your PostgreSQL solution while ensuring high performance and high availability
Table of Contents (23 chapters)
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Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Memory units in postgresql.conf


All of the shared memory settings and the starting client settings for the database are stored in the postgresql.conf file. In PostgreSQL 8.2, a change has greatly simplified memory settings. In earlier versions, you had to know the unit for each memory related setting; some were in units of 1 KB, and some 8 KB, which was difficult to keep track of.

Nowadays, you can still set values like that, but the preferred practice is to use a memory size instead. For example, if you wanted to set the wal_buffers value that controls how much memory to use for buffering WAL data, you can do that now with a line such as the following in the postgresql.conf file:

wal_buffers = 64 KB 

If you use the SHOW command to display the value for this setting, it will write it similarly (although, it's possible that the value will get rescaled to display better). However, the database still converts this value into its own internal units, which, for this parameter, happens to be 8 KB...

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