PostgreSQL version:


Sets the directory to store temporary statistics data in. This can be a path relative to the data directory or an absolute path. The default is pg_stat_tmp. Pointing this at a RAM-based file system will decrease physical I/O requirements and can lead to improved performance. This parameter can only be set in the postgresql.conf file or on the server command line.


Useful for extremely high-volume databases; the stats temp directory could be set to a RAMdisk or other high-speed resource (at the cost of potentially losing some stats) as this file gets updated hundreds of times per second.


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