Table of Contents
PostgreSQL, like any database software, requires that certain tasks be performed regularly to achieve optimum performance. The tasks discussed here arerequired, but they are repetitive in nature and can easily be automated using standard tools such ascronscripts or Windows'Task Scheduler. It is the database administrator's responsibility to set up appropriate scripts, and to check that they execute successfully.
One obvious maintenance task is the creation of backup copies of the data on a regular schedule. Without a recent backup, you have no chance of recovery after a catastrophe (disk failure, fire, mistakenly dropping a critical table, etc.). The backup and recovery mechanisms available inPostgreSQLare discussed at length inChapter 25.
The other main category of maintenance task is periodic“vacuuming”of the database. This activity is discussed inSection 24.1. Closely related to this is updating the statistics that will be used by the query planner, as discussed inSection 24.1.3.
Another task that might need periodic attention is log file management. This is discussed inSection 24.3.
check_postgresis available for monitoring database health and reporting unusual conditions.check_postgresintegrates with Nagios and MRTG, but can be run standalone too.
PostgreSQLis low-maintenance compared to some other database management systems. Nonetheless, appropriate attention to these tasks will go far towards ensuring a pleasant and productive experience with the system.