Oracle查询检查所有活动查询的I/O消耗数据库

Question

是否有检查哪些查询正在消耗大量的内存（I/O）数据库

Answer 1

我用Google搜索了一下，发现任何具体的查询这在：http://www.oracle-wiki.net/startsqlchecksqlwrkareausg

-- 
-- Show SQL Workarea Memory Usage Statistics. 
-- 

SET PAUSE ON 
SET PAUSE 'Press Return to Continue' 
SET PAGESIZE 60 
SET LINESIZE 300 

COLUMN sql FORMAT A10 
COLUMN operation FORMAT A15 
COLUMN op_id FORMAT 99 
COLUMN policy FORMAT A7 
COLUMN estd_opt_size FORMAT 9999 
COLUMN estd_one_size FORMAT 9999 
COLUMN last_mem_usd FORMAT 9999 
COLUMN last_exec FORMAT A9 
COLUMN tot_exec FORMAT 9 
COLUMN opt_exec FORMAT 9 
COLUMN one_exec FORMAT 9 
COLUMN multi_exec FORMAT 10 
COLUMN sec FORMAT 999 
COLUMN max_tmp_sz FORMAT 999 
COLUMN last_tmp_sz FORMAT 999 

SELECT sql_text as sql, 
     operation_type as operation, 
     operation_id as op_id, 
     policy, 
     round(estimated_optimal_size/1024/1024,2) as estd_opt_size, 
     round(estimated_onepass_size/1024/1024,2) as estd_one_size, 
     round(last_memory_used/1024/1024,2) as last_mem_usd, 
     last_execution as last_exec, 
     total_executions as tot_exec, 
     optimal_executions as opt_exec, 
     onepass_executions as one_exec, 
     multipasses_executions as multi_exec, 
     round(active_time/1000000,2) as sec, 
     round(max_tempseg_size/1024/1024,2) as max_tmp_sz, 
     round(last_tempseg_size/1024/1024,2) as last_tmp_sz 
from v$sql_workarea swa, 
     v$sql sq 
where swa.address = sq.address 
and swa.hash_value = sq.hash_value 
and sql_text like '&part_of_sql_statement%' order by sql 
/