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Databases - Practical PostgreSQL
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Disk Space

PostgreSQL does not require the extensive use of disk resources. In fact, in comparison to products such as Oracle, PostgreSQL could be considered fat free. However, PostgreSQL is a database, and as with any database, the requirements will grow as you continue to use PostgreSQL.

On an average Linux machine, you will need approximately 50 MB of hard-drive space to unpack the source and another 60 MB of hard drive space to compile the source. If you choose to run the regression tests, you will need an additional 30 MB. Depending on the configuration options you choose, PostgreSQL can take anywhere from 8 to 15 MB of hard drive space once installed.

Note: Remember that PostgreSQL’s space requirements will grow as you use the system! Be sure to plan ahead for the amount of data you will be storing.

Trying to install on a system lacking in disk space is potentially dangerous! Before installing PostgreSQL, we recommend that you check your filesystem to be sure you have enough disk space in your intended installation partition (e.g., /usr/local ). If you have a GNU-based system, the df command should be at your disposal. Example 2-4 checks for free disk space, reported in 1k blocks.

Example 2-4. Verifying disk space

$ 
df -k

Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/hda1              2355984    932660   1303644  42% /
/dev/hdb1              4142800   2133160   1799192  54% /home
/dev/hda6              1541680    272540   1190828  19% /usr/local
Databases - Practical PostgreSQL
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