To get a list of running SQL queries, log into the PostgreSQL CLI:
psql -U username database
Replace username and database with the proper values. Then run this query:
SELECT procpid,datname,usename,client_addr,waiting,query_start,current_query FROM pg_stat_activity;
Inside the list is also the procpid, which you will need to kill a running query. To kill, run this query, substituting with the proper procpid:
To have scripted automated backup of PostgreSQL databases on a linux platform, you can create a script like so:
#!/bin/bash PGPASSWORD="your-password" /usr/bin/pg_dump -U user database > sql-file.sql
Replace user and your-password with your username and password; replace database with the database you want to backup. The output of the dump goes to stdout and can be piped to a plain text file or compressed to something else.