长事务检测

select datname,usename,query,xact_start,now()-xact_start xact_duration,query_start,now()-query_start query_duration,state from pg_stat_activity where state<>$$idle$$ and (backend_xid is not null or backend_xmin is not null) and now()-xact_start > interval $$30 min$$ order by xact_start;

select name,statement,prepare_time,now()-prepare_time,parameter_types,from_sql from pg_prepared_statements where now()-prepare_time > interval $$30 min$$ order by prepare_time;

echo "----->>>---->>>  长事务, 2PC: "
psql -h $PGHOST -p $PGPORT -U $PGUSER -d $PGDATABASE --pset=pager=off -q -x -c 'select datname,usename,query,xact_start,now()-xact_start xact_duration,query_start,now()-query_start query_duration,state from pg_stat_activity where state<>$$idle$$ and (backend_xid is not null or backend_xmin is not null) and now()-xact_start > interval $$30 min$$ order by xact_start'
psql -h $PGHOST -p $PGPORT -U $PGUSER -d $PGDATABASE --pset=pager=off -q -x -c 'select name,statement,prepare_time,now()-prepare_time,parameter_types,from_sql from pg_prepared_statements where now()-prepare_time > interval $$30 min$$ order by prepare_time'
echo "建议: "
echo "    长事务过程中产生的垃圾, 无法回收, 建议不要在数据库中运行LONG SQL, 或者错开DML高峰时间去运行LONG SQL. 2PC事务一定要记得尽快结束掉, 否则可能会导致数据库膨胀. "
echo "    参考: http://blog.163.com/digoal@126/blog/static/1638770402015329115636287/ "
echo -e "\n"