Chen Huajun

### Problem description When execute some sql，the following error occurs ``` ERROR: RuntimeMergeAppend child's targetlist doesn't match RuntimeMergeAppend ``` The following sql can reproduct this problem ``` CREATE EXTENSION pg_pathman;...

some SQL will fail when use pg_pathman and auto_explain simultaneously

4

### Problem description pg_pathman and auto_explain are not compatible, which will cause some SQL to fail to execute. sample: ``` create table pathman_tb( id int, statis_date date not null );...

Could increase the statistics of CPU waiting time during SQL execution

1

Could add IO indicators（IO throughput of read and write） in pg_sys_cpu_memory_by_process()

执行一个delete从500w的表里删除13w条记录，发现Master挂了。查看日志，是RA monitor超时，认为资源失败。 Pacemaker 在发生Timed Out后重启postgres，迁移阈值是3，可以重启3次。 /var/log/messages ```Nov 18 13:21:44 node1 crmd[2353]: error: Operation pgsql_monitor_3000: Timed Out (node=node1, call=837, timeout=60000ms) Nov 18 13:22:05 node1 expgsql(pgsql)[7774]: INFO: Stopping PostgreSQL on demote. Nov...