GreenPlum 大数据平台--运维(二)

1.如何获取查询运行时和已用时间。

例子:
Select tstart, tfinish, (tfinish-tstart) as total_time, trim(query_text) 
from queries_history 
Where tstart >= '2011-07-07 11:00:00' and tstart < '2011-07-07 13:00:00'
and db ='yourdatabasename'
Order by tstart; 

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2。
*查看上次执行的操作

gpdb=# SELECT schemaname as schema, objname as table, usename as role, actionname as action,
gpdb-# subtype as type, statime as time
gpdb-# FROM pg_stat_operations
gpdb-# WHERE objname='cust';
 schema | table | role | action | type | time
--------+-------+------+--------+------+------
(0 rows)

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