MySQL has a very powerfull command through “show full processlist;”, to see a list of currently running queries.
# mysql # mysql > show full processlist;
PostgreSQL has a similar shell to MySQL, named psql . Here’s how it works. First, change to the postgres user.
# su postgres
Enter the PostgreSQL command shell.
# [postgres@srv]$ psql
And perform the query to see the current activity.
postgres=# select * from pg_stat_activity;
To quit the PostgreSQL shell, type "\q".
This requires you have PostgreSQL configured to enable logging. Edit your PostgreSQL config file (usually at /usr/local/pgsql/data/postgresql.conf), and add the following line.
stats_command_string = true
And reload your PostgreSQL.
pg_ctl reload