如何查詢Buffer Gets，Physical Reads

Top 10 by Buffer Gets:

set linesize 100
set pagesize 100
SELECT * FROM
(SELECT substr(sql_text,1,40) sql,
       buffer_gets, executions, buffer_gets/executions "Gets/Exec",
       hash_value,address
FROM V$SQLAREA
   WHERE buffer_gets > 10000
ORDER BY buffer_gets DESC)
WHERE rownum <= 10
;

Top 10 by Physical Reads:

set linesize 100
set pagesize 100
SELECT * FROM
(SELECT substr(sql_text,1,40) sql,
       disk_reads, executions, disk_reads/executions "Reads/Exec",
       hash_value,address
FROM V$SQLAREA
   WHERE disk_reads > 1000
ORDER BY disk_reads DESC)
WHERE rownum <= 10
;

Top 10 by Executions:

set linesize 100
set pagesize 100
SELECT * FROM
(SELECT substr(sql_text,1,40) sql,
       executions, rows_processed, rows_processed/executions "Rows/Exec",
       hash_value,address
FROM V$SQLAREA
   WHERE executions > 100
ORDER BY executions DESC)
WHERE rownum <= 10
;

Top 10 by Parse Calls:

set linesize 100
set pagesize 100
SELECT * FROM
(SELECT substr(sql_text,1,40) sql,
       parse_calls, executions, hash_value,address
FROM V$SQLAREA
   WHERE parse_calls > 1000
ORDER BY parse_calls DESC)
WHERE rownum <= 10
;

Top 10 by Sharable Memory:

set linesize 100
set pagesize 100
SELECT * FROM
(SELECT substr(sql_text,1,40) sql,
       sharable_mem, executions, hash_value,address
FROM V$SQLAREA
   WHERE sharable_mem > 1048576
ORDER BY sharable_mem DESC)
WHERE rownum <= 10
;

Top 10 by Version Count:

set linesize 100
set pagesize 100
SELECT * FROM
(SELECT substr(sql_text,1,40) sql,
       version_count, executions, hash_value,address
FROM V$SQLAREA
   WHERE version_count > 20
ORDER BY version_count DESC)
WHERE rownum <= 10