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July 9, 2019 14:47
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Stored Function, cleanup postgresql queries.
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| create type query_datatype as (pid int, duration text, query text); | |
| drop type query_datatype cascade; | |
| drop function terminate_performance_killer(); | |
| create OR REPLACE FUNCTION terminate_performance_killer() RETURNS SETOF query_datatype | |
| LANGUAGE plpgsql | |
| AS $$ | |
| DECLARE | |
| items query_datatype; | |
| begin | |
| drop table tabletemp; | |
| create temp table tabletemp | |
| ( pid int, | |
| duration text, | |
| query text | |
| ); | |
| insert into tabletemp select results.pid, results.duration, results.query from ( | |
| select pid, now() - pg_stat_activity.query_start AS duration, query, state | |
| FROM pg_stat_activity | |
| WHERE (now() - pg_stat_activity.query_start) > interval '5 minutes' | |
| ) as results; | |
| FOR items IN SELECT * FROM tabletemp LOOP | |
| RAISE NOTICE 'pid: %s, duration: %s, query: %s', items.pid, items.duration, items.query; | |
| perform pg_terminate_backend(items.pid); | |
| END LOOP; | |
| return QUERY select pid, duration, query from tabletemp; | |
| END; | |
| $$; | |
| select terminate_performance_killer(); |
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Cronjob example
https://github.com/citusdata/pg_cron
SELECT cron.schedule('30 * * * *', 'terminate_performance_killer');