Error PG的默认最大连接数是100. 如果超过100就会报错sorry, too many clients already Find show max_connections; SELECT COUNT(*) from pg_stat_activity; SELECT * FROM pg_stat_activity; Solution 提高最大连接数 ALTER SYSTEM SET max_connections 然后重启pg 查看程序,减少从未关闭连接的函数修改事务时间,减少事务未提交带来的问题 SET statement_timeout = 50000; # 此处设置成50秒