cd /opt wget https://github.com.citusdata/pg_cron/archive/v1.2.0.tar.gz tar zxvf v1.2.0.tar.gz cd pg_cron-1.2.0 make PG_CONFIG=/opt/pgsql/bin/pg_config make install PG_CONFIG=/opt/pgsql/bin/pg_config
vi postgresql.conf shared_preload_libraries='pg_cron' cron.database_name='postgres' --pg_cron元数据存放数据库
pg_ctl -D /opt/data/ restart
/opt/pg12/bin/psql -p 5555 -U postgres postgres=# create extension pg_cron; CREATE EXTENSIOIN
postgres=# GRANT USAGE ON SCHEMA cron TO test;
cron格式
/opt/pg12/bin/psql -p 5555 -Utest postgres --每分钟插入一条随机数据 postgres=> SELECT cron.schedule('* * * * *', $insert into t values((random()*100)::int, 'test');$$); --每天上午9点执行清理 postgres=> SELECT cron.schedule('0 10 * * *', 'VACUUM');
postgres=> select jobid, command from cron.job; jobid | command ------+--------------------- 6 | insert into t values((random()*100)::int, 'test'); 7 | VACUUM
postgres=> select cron.unschedule(7); -- cron.job.jobid
https://github.com/citusdata/pg_cron
pg_cron不会再备库运行job,但当备库提升为主库时会自动开启job,pg_cron时间为GMT