February 2020
Intermediate to advanced
734 pages
38h 13m
English
Content preview from PostgreSQL 12 High Availability Cookbook - Third Edition
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Real-world example
There are quite a few very large databases using PostgreSQL. Whether or not they have thousands of tables and indexes, billions of rows, or handle billions of queries per day, statistics help us plan for the future. Let's apply the previous steps to an example database that actually exists:
- The database is currently 875 GB.
- The database was 865 GB last week.
- The database grows by 10 GB per week.
- Thus, the database grows by 40 GB every 4 weeks.
- Using the formula we discussed in step two of this recipe, our size estimate after 3 years is: 875 * (1 + 40/875)^36 = 4,374 GB.
- Doubled, this is 8,748 GB.
Keep in mind that this estimation technique may grossly exaggerate the necessary space. If we take the existing 40 GB monthly ...
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