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Loading into cache from said PostgreSQL database the tables, which are most frequently scanned.

Project description

Limiter for loading into cache is the value of “effective_cache_size”.

It makes sense to use after restarting the server!

Before using, you need to connect to the database as superuser and add the extension ‘pg_prewarm’ (added to PostgreSQL since version 9.4):

create extension pg_prewarm;


pg_hotcache [-?] [-h HOST] [-p PORT] [-U USERNAME] [-W PASSWORD] -d DBNAME

Optional arguments:

-?, --help            show this help message and exit
-h HOST, --host HOST  database server host or socket directory (default:
                      "local socket")
-p PORT, --port PORT  database server port (default: "5432")
                      database user name (default: "unix user")
                      force password prompt (should happen automatically)
-d DBNAME, --dbname DBNAME
                      database name for caching


sudo -u postgres pg_hotcache -d dbname
pg_hotcache -h -p 5432 -U username -d dbname

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