ORACLE BASICS AND INTERNALS: EXAMPLE TOP SQL QUERIES FROM SQLAREA

EXAMPLE V$SQLAREA QUERIES
-------------------------
 
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
;

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Related links :

LATCHES LOCKS PINS AND MUTEXES

http://koenigocm.blogspot.in/search/label/LATCHES%20LOCKS%20PINS%20AND%20MUTEXES

MUTEXES AND LATCHES

http://koenigocm.blogspot.in/search/label/MUTEXES%20AND%20LATCHES

PARENT AND CHILD CURSORS IN ORACLE

http://koenigocm.blogspot.in/search/label/PARENT%20AND%20CHILD%20CURSORS%20IN%20ORACLE

QUICK OVERVIEW OF SHARED POOL TUNING

http://koenigocm.blogspot.in/search/label/QUICK%20OVERVIEW%20OF%20SHARED%20POOL%20TUNING

SHARED POOL ARCHITECTURE

http://koenigocm.blogspot.in/search/label/SHARED%20POOL%20ARCHITECTURE

SQL PLAN MANAGEMENT – ORACLE 11g : Part-1