/*************************************************************************
Check the ALL Active/Inactive session
**************************************************************************/
set linesize 750 pages 9999
column box format a30
column spid format a10
column username format a30
column program format a30
column os_user format a20
col LOGON_TIME for a20
select b.inst_id,b.sid,b.serial#,a.spid, substr(b.machine,1,30) box,to_char (b.logon_time, 'dd-mon-yyyy hh24:mi:ss') logon_time,
substr(b.username,1,30) username,
substr(b.osuser,1,20) os_user,
substr(b.program,1,30) program,status,b.last_call_et AS last_call_et_secs,b.sql_id
from gv$session b,gv$process a
where b.paddr = a.addr
and a.inst_id = b.inst_id
and type='USER'
order by logon_time;
/*************************************************************************
Check the all Active session
**************************************************************************/
set linesize 750 pages 9999
column box format a30
column spid format a10
column username format a30
column program format a30
column os_user format a20
col LOGON_TIME for a20
select b.inst_id,b.sid,b.serial#,a.spid, substr(b.machine,1,30) box,to_char (b.logon_time, 'dd-mon-yyyy hh24:mi:ss') logon_time,
substr(b.username,1,30) username,
substr(b.osuser,1,20) os_user,
substr(b.program,1,30) program,status,b.last_call_et AS last_call_et_secs,b.sql_id
from gv$session b,gv$process a
where b.paddr = a.addr
and a.inst_id = b.inst_id
and type='USER' and b.status='ACTIVE'
order by logon_time;
/*************************************************************************
Check the ALL Active/Inactive sessions by SID
**************************************************************************/
set linesize 750 pages 9999
column box format a30
column spid format a10
column username format a30
column program format a30
column os_user format a20
col LOGON_TIME for a20
select b.inst_id,b.sid,b.serial#,a.spid, substr(b.machine,1,30) box,to_char (b.logon_time, 'dd-mon-yyyy hh24:mi:ss') logon_time,
substr(b.username,1,30) username,
substr(b.osuser,1,20) os_user,
substr(b.program,1,30) program,status,b.last_call_et AS last_call_et_secs,b.sql_id
from gv$session b,gv$process a
where b.paddr = a.addr
and a.inst_id = b.inst_id
and type='USER' and b.SID='&SID'
-- and b.status='ACTIVE'
-- and b.status='INACTIVE'
order by logon_time;
/*************************************************************************
Check the ALL Active/Inactive sessions by Username
**************************************************************************/
set linesize 750 pages 9999
column box format a30
column spid format a10
column username format a30
column program format a30
column os_user format a20
col LOGON_TIME for a20
select b.inst_id,b.sid,b.serial#,a.spid, substr(b.machine,1,30) box,to_char (b.logon_time, 'dd-mon-yyyy hh24:mi:ss') logon_time,
substr(b.username,1,30) username,
substr(b.osuser,1,20) os_user,
substr(b.program,1,30) program,status,b.last_call_et AS last_call_et_secs,b.sql_id
from gv$session b,gv$process a
where b.paddr = a.addr
and a.inst_id = b.inst_id
and type='USER' and b.username='&username'
-- and b.status='ACTIVE'
-- and b.status='INACTIVE'
order by logon_time;
/*************************************************************************
SQL Monitor
**************************************************************************/
set lines 1000 pages 9999
column sid format 9999
column serial for 999999
column status format a15
column username format a10
column sql_text format a80
column module format a30
col program for a30
col SQL_EXEC_START for a20
SELECT * FROM
(SELECT status,inst_id,sid,SESSION_SERIAL# as Serial,username,sql_id,SQL_PLAN_HASH_VALUE,
MODULE,program,
TO_CHAR(sql_exec_start,'dd-mon-yyyy hh24:mi:ss') AS sql_exec_start,
ROUND(elapsed_time/1000000) AS "Elapsed (s)",
ROUND(cpu_time /1000000) AS "CPU (s)",
substr(sql_text,1,30) sql_text
FROM gv$sql_monitor where status='EXECUTING' and module not like '%emagent%'
ORDER BY sql_exec_start desc
);
/*************************************************************************
---- Sql-Monitor report for a sql_id ( Like OEM report)
**************************************************************************/
column text_line format a254
set lines 750 pages 9999
set long 20000 longchunksize 20000
select
dbms_sqltune.report_sql_monitor_list() text_line
from dual;
select
dbms_sqltune.report_sql_monitor() text_line
from dual;
4. Blocking sessions
**** To find Blocking GOOD query
set lines 750 pages 9999
col blocking_status for a100
select s1.inst_id,s2.inst_id,s1.username || '@' || s1.machine
|| ' ( SID=' || s1.sid || ' ) is blocking '
|| s2.username || '@' || s2.machine || ' ( SID=' || s2.sid || ' ) ' AS blocking_status
from gv$lock l1, gv$session s1, gv$lock l2, gv$session s2
where s1.sid=l1.sid and s2.sid=l2.sid and s1.inst_id=l1.inst_id and s2.inst_id=l2.inst_id
and l1.BLOCK=1 and l2.request > 0
and l1.id1 = l2.id1
and l2.id2 = l2.id2
order by s1.inst_id;
**** Check who is blocking who in RAC, including objects
SELECT DECODE(request,0,'Holder: ','Waiter: ') || gv$lock.sid sess, machine, do.object_name as locked_object,id1, id2, lmode, request, gv$lock.type
FROM gv$lock join gv$session on gv$lock.sid=gv$session.sid and gv$lock.inst_id=gv$session.inst_id
join gv$locked_object lo on gv$lock.SID = lo.SESSION_ID and gv$lock.inst_id=lo.inst_id
join dba_objects do on lo.OBJECT_ID = do.OBJECT_ID
WHERE (id1, id2, gv$lock.type) IN (
SELECT id1, id2, type FROM gv$lock WHERE request>0)
ORDER BY id1, request;
5. Kill Sessions
select 'alter system kill session ' || '''' || sid || ',' || serial# ||',@'|| inst_id || '''' || ' immediate;' from gv$session where sid='&sid';
6. SQL History
set lines 1000 pages 9999
COL instance_number FOR 9999 HEA 'Inst';
COL end_time HEA 'End Time';
COL plan_hash_value HEA 'Plan|Hash Value';
COL executions_total FOR 999,999 HEA 'Execs|Total';
COL rows_per_exec HEA 'Rows Per Exec';
COL et_secs_per_exec HEA 'Elap Secs|Per Exec';
COL cpu_secs_per_exec HEA 'CPU Secs|Per Exec';
COL io_secs_per_exec HEA 'IO Secs|Per Exec';
COL cl_secs_per_exec HEA 'Clus Secs|Per Exec';
COL ap_secs_per_exec HEA 'App Secs|Per Exec';
COL cc_secs_per_exec HEA 'Conc Secs|Per Exec';
COL pl_secs_per_exec HEA 'PLSQL Secs|Per Exec';
COL ja_secs_per_exec HEA 'Java Secs|Per Exec';
SELECT 'gv$dba_hist_sqlstat' source,h.instance_number,
TO_CHAR(CAST(s.begin_interval_time AS DATE), 'DD-MM-YYYY HH24:MI') snap_time,
TO_CHAR(CAST(s.end_interval_time AS DATE), 'DD-MM-YYYY HH24:MI') end_time,
h.sql_id,
h.plan_hash_value,
h.executions_total,
TO_CHAR(ROUND(h.rows_processed_total / h.executions_total), '999,999,999,999') rows_per_exec,
TO_CHAR(ROUND(h.elapsed_time_total / h.executions_total / 1e6, 3), '999,990.000') et_secs_per_exec,
TO_CHAR(ROUND(h.cpu_time_total / h.executions_total / 1e6, 3), '999,990.000') cpu_secs_per_exec,
TO_CHAR(ROUND(h.iowait_total / h.executions_total / 1e6, 3), '999,990.000') io_secs_per_exec,
TO_CHAR(ROUND(h.clwait_total / h.executions_total / 1e6, 3), '999,990.000') cl_secs_per_exec,
TO_CHAR(ROUND(h.apwait_total / h.executions_total / 1e6, 3), '999,990.000') ap_secs_per_exec,
TO_CHAR(ROUND(h.ccwait_total / h.executions_total / 1e6, 3), '999,990.000') cc_secs_per_exec,
TO_CHAR(ROUND(h.plsexec_time_total / h.executions_total / 1e6, 3), '999,990.000') pl_secs_per_exec,
TO_CHAR(ROUND(h.javexec_time_total / h.executions_total / 1e6, 3), '999,990.000') ja_secs_per_exec
FROM dba_hist_sqlstat h,
dba_hist_snapshot s
WHERE h.sql_id = '&sql_id'
AND h.executions_total > 0
AND s.snap_id = h.snap_id
AND s.dbid = h.dbid
AND s.instance_number = h.instance_number
UNION ALL
SELECT 'gv$sqlarea_plan_hash' source,h.inst_id,
TO_CHAR(sysdate, 'DD-MM-YYYY HH24:MI') snap_time,
TO_CHAR(sysdate, 'DD-MM-YYYY HH24:MI') end_time,
h.sql_id,
h.plan_hash_value,
h.executions,
TO_CHAR(ROUND(h.rows_processed / h.executions), '999,999,999,999') rows_per_exec,
TO_CHAR(ROUND(h.elapsed_time / h.executions / 1e6, 3), '999,990.000') et_secs_per_exec,
TO_CHAR(ROUND(h.cpu_time / h.executions / 1e6, 3), '999,990.000') cpu_secs_per_exec,
TO_CHAR(ROUND(h.USER_IO_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') io_secs_per_exec,
TO_CHAR(ROUND(h.CLUSTER_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') cl_secs_per_exec,
TO_CHAR(ROUND(h.APPLICATION_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') ap_secs_per_exec,
TO_CHAR(ROUND(h.CLUSTER_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') cc_secs_per_exec,
TO_CHAR(ROUND(h.PLSQL_EXEC_TIME / h.executions / 1e6, 3), '999,990.000') pl_secs_per_exec,
TO_CHAR(ROUND(h.JAVA_EXEC_TIME / h.executions / 1e6, 3), '999,990.000') ja_secs_per_exec
FROM gv$sqlarea_plan_hash h
WHERE h.sql_id = '&sql_id'
AND h.executions > 0
order by source ;
7. Find Force Matching Signature
col exact_matching_signature for 99999999999999999999999999
col sql_text for a50
set long 20000
set lines 750 pages 9999
select sql_id, exact_matching_signature, force_matching_signature, SQL_TEXT from v$sqlarea where sql_id='&sql_id';
UNION ALL
select sql_id,force_matching_signature,SQL_TEXT from dba_hist_sqltext where sql_id='&sql_id'
/
-- If you want to find Bind variable for SQL_ID
col VALUE_STRING for a50
SELECT NAME,POSITION,DATATYPE_STRING,VALUE_STRING FROM gv$sql_bind_capture WHERE sql_id='&sql_id';
8. SQL Tuning Advisor
http://www.br8dba.com/sql-tuning-advisor-manually/
9. SQLT
http://www.br8dba.com/sqlt/
10. SQL Health Check
SQL Tuning Health-Check Script (SQLHC) (Doc ID 1366133.1)
11. SQL Plan Flip
set lines 1000 pages 9999
COL instance_number FOR 9999 HEA 'Inst';
COL end_time HEA 'End Time';
COL plan_hash_value HEA 'Plan|Hash Value';
COL executions_total FOR 999,999 HEA 'Execs|Total';
COL rows_per_exec HEA 'Rows Per Exec';
COL et_secs_per_exec HEA 'Elap Secs|Per Exec';
COL cpu_secs_per_exec HEA 'CPU Secs|Per Exec';
COL io_secs_per_exec HEA 'IO Secs|Per Exec';
COL cl_secs_per_exec HEA 'Clus Secs|Per Exec';
COL ap_secs_per_exec HEA 'App Secs|Per Exec';
COL cc_secs_per_exec HEA 'Conc Secs|Per Exec';
COL pl_secs_per_exec HEA 'PLSQL Secs|Per Exec';
COL ja_secs_per_exec HEA 'Java Secs|Per Exec';
SELECT 'gv$dba_hist_sqlstat' source,h.instance_number,
TO_CHAR(CAST(s.begin_interval_time AS DATE), 'DD-MM-YYYY HH24:MI') snap_time,
TO_CHAR(CAST(s.end_interval_time AS DATE), 'DD-MM-YYYY HH24:MI') end_time,
h.sql_id,
h.plan_hash_value,
h.executions_total,
TO_CHAR(ROUND(h.rows_processed_total / h.executions_total), '999,999,999,999') rows_per_exec,
TO_CHAR(ROUND(h.elapsed_time_total / h.executions_total / 1e6, 3), '999,990.000') et_secs_per_exec,
TO_CHAR(ROUND(h.cpu_time_total / h.executions_total / 1e6, 3), '999,990.000') cpu_secs_per_exec,
TO_CHAR(ROUND(h.iowait_total / h.executions_total / 1e6, 3), '999,990.000') io_secs_per_exec,
TO_CHAR(ROUND(h.clwait_total / h.executions_total / 1e6, 3), '999,990.000') cl_secs_per_exec,
TO_CHAR(ROUND(h.apwait_total / h.executions_total / 1e6, 3), '999,990.000') ap_secs_per_exec,
TO_CHAR(ROUND(h.ccwait_total / h.executions_total / 1e6, 3), '999,990.000') cc_secs_per_exec,
TO_CHAR(ROUND(h.plsexec_time_total / h.executions_total / 1e6, 3), '999,990.000') pl_secs_per_exec,
TO_CHAR(ROUND(h.javexec_time_total / h.executions_total / 1e6, 3), '999,990.000') ja_secs_per_exec
FROM dba_hist_sqlstat h,
dba_hist_snapshot s
WHERE h.sql_id = '&sql_id'
AND h.executions_total > 0
AND s.snap_id = h.snap_id
AND s.dbid = h.dbid
AND s.instance_number = h.instance_number
UNION ALL
SELECT 'gv$sqlarea_plan_hash' source,h.inst_id,
TO_CHAR(sysdate, 'DD-MM-YYYY HH24:MI') snap_time,
TO_CHAR(sysdate, 'DD-MM-YYYY HH24:MI') end_time,
h.sql_id,
h.plan_hash_value,
h.executions,
TO_CHAR(ROUND(h.rows_processed / h.executions), '999,999,999,999') rows_per_exec,
TO_CHAR(ROUND(h.elapsed_time / h.executions / 1e6, 3), '999,990.000') et_secs_per_exec,
TO_CHAR(ROUND(h.cpu_time / h.executions / 1e6, 3), '999,990.000') cpu_secs_per_exec,
TO_CHAR(ROUND(h.USER_IO_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') io_secs_per_exec,
TO_CHAR(ROUND(h.CLUSTER_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') cl_secs_per_exec,
TO_CHAR(ROUND(h.APPLICATION_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') ap_secs_per_exec,
TO_CHAR(ROUND(h.CLUSTER_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') cc_secs_per_exec,
TO_CHAR(ROUND(h.PLSQL_EXEC_TIME / h.executions / 1e6, 3), '999,990.000') pl_secs_per_exec,
TO_CHAR(ROUND(h.JAVA_EXEC_TIME / h.executions / 1e6, 3), '999,990.000') ja_secs_per_exec
FROM gv$sqlarea_plan_hash h
WHERE h.sql_id = '&sql_id'
AND h.executions > 0
order by source ;
12. Find Stale Stats
http://www.br8dba.com/statistics/
exec DBMS_STATS.FLUSH_DATABASE_MONITORING_INFO;
select OWNER,TABLE_NAME,LAST_ANALYZED,STALE_STATS from DBA_TAB_STATISTICS where STALE_STATS='YES' and OWNER='&owner;
*** statistics of objects of a specific sql id
set lines 300 set pages 300
col table_name for a40
col owner for a30
select distinct owner, table_name, STALE_STATS, last_analyzed, stattype_locked
from dba_tab_statistics
where (owner, table_name) in
(select distinct owner, table_name
from dba_tables
where ( table_name)
in ( select object_name
from gv$sql_plan
where upper(sql_id) = upper('&sql_id') and object_name is not null))
--and STALE_STATS='YES'
/
13. Gather Stats
http://www.br8dba.com/statistics/
http://www.br8dba.com/oracle-histograms/
14. PIN Optimal Plan
-- Run below script, you can download this script from SQLT
-- Reference: http://www.br8dba.com/how-to-create-custom-sql-profile/
@coe_xfr_sql_monitor.sql <sql_id> <plan_hash_value> -- to create SQL profile
The coe_xfr_sql_profile.sql script would create another sql file, which should be run to create manual sql profile for the sql
The new sql file created.
ls -ltr coe_xfr_sql_profile_<sql_id>_<plan_hash_value>.sql
cat coe_xfr_sql_profile_<sql_id>_<plan_hash_value>.sql
@coe_xfr_sql_profile_<sql_id>_<plan_hash_value>.sql
15. Find Fragmentation
*** Table Fragmentation
select
table_name,round((blocks*8),2) "size (kb)" ,
round((num_rows*avg_row_len/1024),2) "actual_data (kb)",
(round((blocks*8),2) - round((num_rows*avg_row_len/1024),2)) "wasted_space (kb)"
from
dba_tables
where owner='&OWNER' and table_name='&TABLE_NAME' and
(round((blocks*8),2) > round((num_rows*avg_row_len/1024),2))
order by 4 desc;
16. De-Fragmentation
*** There are many methods.
Option 1: Shrink command
alter table enable row movement;
/*
Using the enable row movement clause can reduce the clustering_factor for a primary access index, causing excessive I/O. Oracle introduced the sorted gash cluster as a way to keep an index in-order with the table rows, a technique that greatly reduces I/O for common queries.
Beware that using "enable row movement" can cause Oracle to move rows to discontinuous data blocks, causing a performance problem. Remember, the physical placement of rows on data blocks can still make a huge difference in query performance.
*/
alter table shrink space compact;
alter table shrink space cascade;
http://www.dba-oracle.com/t_enable_row_movement.htm
Option 2: Table move
Alter table move - The alter table xxx move command moves rows down into un-used space and adjusts the HWM but does not adjust the segments extents, and the table size remains the same. The alter table move syntax also preserves the index and constraint definitions.
ALTER TABLE <table_name> MOVE;
Option 3: EXPORT / IMPORT
** EXPORT
** DROP ALL RESPECTIVE OBJECTS
** IMPORT FROM EXPORT BACKUP
Option 4: EXPORT / IMPORT WITH TABLE_EXISTS_ACTION=REPLACE
** EXPORT
** IMPORT USING TABLE_EXISTS_ACTION=REPLACE
Option 5: Other methods
Check the ALL Active/Inactive session
**************************************************************************/
set linesize 750 pages 9999
column box format a30
column spid format a10
column username format a30
column program format a30
column os_user format a20
col LOGON_TIME for a20
select b.inst_id,b.sid,b.serial#,a.spid, substr(b.machine,1,30) box,to_char (b.logon_time, 'dd-mon-yyyy hh24:mi:ss') logon_time,
substr(b.username,1,30) username,
substr(b.osuser,1,20) os_user,
substr(b.program,1,30) program,status,b.last_call_et AS last_call_et_secs,b.sql_id
from gv$session b,gv$process a
where b.paddr = a.addr
and a.inst_id = b.inst_id
and type='USER'
order by logon_time;
/*************************************************************************
Check the all Active session
**************************************************************************/
set linesize 750 pages 9999
column box format a30
column spid format a10
column username format a30
column program format a30
column os_user format a20
col LOGON_TIME for a20
select b.inst_id,b.sid,b.serial#,a.spid, substr(b.machine,1,30) box,to_char (b.logon_time, 'dd-mon-yyyy hh24:mi:ss') logon_time,
substr(b.username,1,30) username,
substr(b.osuser,1,20) os_user,
substr(b.program,1,30) program,status,b.last_call_et AS last_call_et_secs,b.sql_id
from gv$session b,gv$process a
where b.paddr = a.addr
and a.inst_id = b.inst_id
and type='USER' and b.status='ACTIVE'
order by logon_time;
/*************************************************************************
Check the ALL Active/Inactive sessions by SID
**************************************************************************/
set linesize 750 pages 9999
column box format a30
column spid format a10
column username format a30
column program format a30
column os_user format a20
col LOGON_TIME for a20
select b.inst_id,b.sid,b.serial#,a.spid, substr(b.machine,1,30) box,to_char (b.logon_time, 'dd-mon-yyyy hh24:mi:ss') logon_time,
substr(b.username,1,30) username,
substr(b.osuser,1,20) os_user,
substr(b.program,1,30) program,status,b.last_call_et AS last_call_et_secs,b.sql_id
from gv$session b,gv$process a
where b.paddr = a.addr
and a.inst_id = b.inst_id
and type='USER' and b.SID='&SID'
-- and b.status='ACTIVE'
-- and b.status='INACTIVE'
order by logon_time;
/*************************************************************************
Check the ALL Active/Inactive sessions by Username
**************************************************************************/
set linesize 750 pages 9999
column box format a30
column spid format a10
column username format a30
column program format a30
column os_user format a20
col LOGON_TIME for a20
select b.inst_id,b.sid,b.serial#,a.spid, substr(b.machine,1,30) box,to_char (b.logon_time, 'dd-mon-yyyy hh24:mi:ss') logon_time,
substr(b.username,1,30) username,
substr(b.osuser,1,20) os_user,
substr(b.program,1,30) program,status,b.last_call_et AS last_call_et_secs,b.sql_id
from gv$session b,gv$process a
where b.paddr = a.addr
and a.inst_id = b.inst_id
and type='USER' and b.username='&username'
-- and b.status='ACTIVE'
-- and b.status='INACTIVE'
order by logon_time;
/*************************************************************************
SQL Monitor
**************************************************************************/
set lines 1000 pages 9999
column sid format 9999
column serial for 999999
column status format a15
column username format a10
column sql_text format a80
column module format a30
col program for a30
col SQL_EXEC_START for a20
SELECT * FROM
(SELECT status,inst_id,sid,SESSION_SERIAL# as Serial,username,sql_id,SQL_PLAN_HASH_VALUE,
MODULE,program,
TO_CHAR(sql_exec_start,'dd-mon-yyyy hh24:mi:ss') AS sql_exec_start,
ROUND(elapsed_time/1000000) AS "Elapsed (s)",
ROUND(cpu_time /1000000) AS "CPU (s)",
substr(sql_text,1,30) sql_text
FROM gv$sql_monitor where status='EXECUTING' and module not like '%emagent%'
ORDER BY sql_exec_start desc
);
/*************************************************************************
---- Sql-Monitor report for a sql_id ( Like OEM report)
**************************************************************************/
column text_line format a254
set lines 750 pages 9999
set long 20000 longchunksize 20000
select
dbms_sqltune.report_sql_monitor_list() text_line
from dual;
select
dbms_sqltune.report_sql_monitor() text_line
from dual;
4. Blocking sessions
**** To find Blocking GOOD query
set lines 750 pages 9999
col blocking_status for a100
select s1.inst_id,s2.inst_id,s1.username || '@' || s1.machine
|| ' ( SID=' || s1.sid || ' ) is blocking '
|| s2.username || '@' || s2.machine || ' ( SID=' || s2.sid || ' ) ' AS blocking_status
from gv$lock l1, gv$session s1, gv$lock l2, gv$session s2
where s1.sid=l1.sid and s2.sid=l2.sid and s1.inst_id=l1.inst_id and s2.inst_id=l2.inst_id
and l1.BLOCK=1 and l2.request > 0
and l1.id1 = l2.id1
and l2.id2 = l2.id2
order by s1.inst_id;
**** Check who is blocking who in RAC, including objects
SELECT DECODE(request,0,'Holder: ','Waiter: ') || gv$lock.sid sess, machine, do.object_name as locked_object,id1, id2, lmode, request, gv$lock.type
FROM gv$lock join gv$session on gv$lock.sid=gv$session.sid and gv$lock.inst_id=gv$session.inst_id
join gv$locked_object lo on gv$lock.SID = lo.SESSION_ID and gv$lock.inst_id=lo.inst_id
join dba_objects do on lo.OBJECT_ID = do.OBJECT_ID
WHERE (id1, id2, gv$lock.type) IN (
SELECT id1, id2, type FROM gv$lock WHERE request>0)
ORDER BY id1, request;
5. Kill Sessions
select 'alter system kill session ' || '''' || sid || ',' || serial# ||',@'|| inst_id || '''' || ' immediate;' from gv$session where sid='&sid';
6. SQL History
set lines 1000 pages 9999
COL instance_number FOR 9999 HEA 'Inst';
COL end_time HEA 'End Time';
COL plan_hash_value HEA 'Plan|Hash Value';
COL executions_total FOR 999,999 HEA 'Execs|Total';
COL rows_per_exec HEA 'Rows Per Exec';
COL et_secs_per_exec HEA 'Elap Secs|Per Exec';
COL cpu_secs_per_exec HEA 'CPU Secs|Per Exec';
COL io_secs_per_exec HEA 'IO Secs|Per Exec';
COL cl_secs_per_exec HEA 'Clus Secs|Per Exec';
COL ap_secs_per_exec HEA 'App Secs|Per Exec';
COL cc_secs_per_exec HEA 'Conc Secs|Per Exec';
COL pl_secs_per_exec HEA 'PLSQL Secs|Per Exec';
COL ja_secs_per_exec HEA 'Java Secs|Per Exec';
SELECT 'gv$dba_hist_sqlstat' source,h.instance_number,
TO_CHAR(CAST(s.begin_interval_time AS DATE), 'DD-MM-YYYY HH24:MI') snap_time,
TO_CHAR(CAST(s.end_interval_time AS DATE), 'DD-MM-YYYY HH24:MI') end_time,
h.sql_id,
h.plan_hash_value,
h.executions_total,
TO_CHAR(ROUND(h.rows_processed_total / h.executions_total), '999,999,999,999') rows_per_exec,
TO_CHAR(ROUND(h.elapsed_time_total / h.executions_total / 1e6, 3), '999,990.000') et_secs_per_exec,
TO_CHAR(ROUND(h.cpu_time_total / h.executions_total / 1e6, 3), '999,990.000') cpu_secs_per_exec,
TO_CHAR(ROUND(h.iowait_total / h.executions_total / 1e6, 3), '999,990.000') io_secs_per_exec,
TO_CHAR(ROUND(h.clwait_total / h.executions_total / 1e6, 3), '999,990.000') cl_secs_per_exec,
TO_CHAR(ROUND(h.apwait_total / h.executions_total / 1e6, 3), '999,990.000') ap_secs_per_exec,
TO_CHAR(ROUND(h.ccwait_total / h.executions_total / 1e6, 3), '999,990.000') cc_secs_per_exec,
TO_CHAR(ROUND(h.plsexec_time_total / h.executions_total / 1e6, 3), '999,990.000') pl_secs_per_exec,
TO_CHAR(ROUND(h.javexec_time_total / h.executions_total / 1e6, 3), '999,990.000') ja_secs_per_exec
FROM dba_hist_sqlstat h,
dba_hist_snapshot s
WHERE h.sql_id = '&sql_id'
AND h.executions_total > 0
AND s.snap_id = h.snap_id
AND s.dbid = h.dbid
AND s.instance_number = h.instance_number
UNION ALL
SELECT 'gv$sqlarea_plan_hash' source,h.inst_id,
TO_CHAR(sysdate, 'DD-MM-YYYY HH24:MI') snap_time,
TO_CHAR(sysdate, 'DD-MM-YYYY HH24:MI') end_time,
h.sql_id,
h.plan_hash_value,
h.executions,
TO_CHAR(ROUND(h.rows_processed / h.executions), '999,999,999,999') rows_per_exec,
TO_CHAR(ROUND(h.elapsed_time / h.executions / 1e6, 3), '999,990.000') et_secs_per_exec,
TO_CHAR(ROUND(h.cpu_time / h.executions / 1e6, 3), '999,990.000') cpu_secs_per_exec,
TO_CHAR(ROUND(h.USER_IO_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') io_secs_per_exec,
TO_CHAR(ROUND(h.CLUSTER_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') cl_secs_per_exec,
TO_CHAR(ROUND(h.APPLICATION_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') ap_secs_per_exec,
TO_CHAR(ROUND(h.CLUSTER_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') cc_secs_per_exec,
TO_CHAR(ROUND(h.PLSQL_EXEC_TIME / h.executions / 1e6, 3), '999,990.000') pl_secs_per_exec,
TO_CHAR(ROUND(h.JAVA_EXEC_TIME / h.executions / 1e6, 3), '999,990.000') ja_secs_per_exec
FROM gv$sqlarea_plan_hash h
WHERE h.sql_id = '&sql_id'
AND h.executions > 0
order by source ;
7. Find Force Matching Signature
col exact_matching_signature for 99999999999999999999999999
col sql_text for a50
set long 20000
set lines 750 pages 9999
select sql_id, exact_matching_signature, force_matching_signature, SQL_TEXT from v$sqlarea where sql_id='&sql_id';
UNION ALL
select sql_id,force_matching_signature,SQL_TEXT from dba_hist_sqltext where sql_id='&sql_id'
/
-- If you want to find Bind variable for SQL_ID
col VALUE_STRING for a50
SELECT NAME,POSITION,DATATYPE_STRING,VALUE_STRING FROM gv$sql_bind_capture WHERE sql_id='&sql_id';
8. SQL Tuning Advisor
http://www.br8dba.com/sql-tuning-advisor-manually/
9. SQLT
http://www.br8dba.com/sqlt/
10. SQL Health Check
SQL Tuning Health-Check Script (SQLHC) (Doc ID 1366133.1)
11. SQL Plan Flip
set lines 1000 pages 9999
COL instance_number FOR 9999 HEA 'Inst';
COL end_time HEA 'End Time';
COL plan_hash_value HEA 'Plan|Hash Value';
COL executions_total FOR 999,999 HEA 'Execs|Total';
COL rows_per_exec HEA 'Rows Per Exec';
COL et_secs_per_exec HEA 'Elap Secs|Per Exec';
COL cpu_secs_per_exec HEA 'CPU Secs|Per Exec';
COL io_secs_per_exec HEA 'IO Secs|Per Exec';
COL cl_secs_per_exec HEA 'Clus Secs|Per Exec';
COL ap_secs_per_exec HEA 'App Secs|Per Exec';
COL cc_secs_per_exec HEA 'Conc Secs|Per Exec';
COL pl_secs_per_exec HEA 'PLSQL Secs|Per Exec';
COL ja_secs_per_exec HEA 'Java Secs|Per Exec';
SELECT 'gv$dba_hist_sqlstat' source,h.instance_number,
TO_CHAR(CAST(s.begin_interval_time AS DATE), 'DD-MM-YYYY HH24:MI') snap_time,
TO_CHAR(CAST(s.end_interval_time AS DATE), 'DD-MM-YYYY HH24:MI') end_time,
h.sql_id,
h.plan_hash_value,
h.executions_total,
TO_CHAR(ROUND(h.rows_processed_total / h.executions_total), '999,999,999,999') rows_per_exec,
TO_CHAR(ROUND(h.elapsed_time_total / h.executions_total / 1e6, 3), '999,990.000') et_secs_per_exec,
TO_CHAR(ROUND(h.cpu_time_total / h.executions_total / 1e6, 3), '999,990.000') cpu_secs_per_exec,
TO_CHAR(ROUND(h.iowait_total / h.executions_total / 1e6, 3), '999,990.000') io_secs_per_exec,
TO_CHAR(ROUND(h.clwait_total / h.executions_total / 1e6, 3), '999,990.000') cl_secs_per_exec,
TO_CHAR(ROUND(h.apwait_total / h.executions_total / 1e6, 3), '999,990.000') ap_secs_per_exec,
TO_CHAR(ROUND(h.ccwait_total / h.executions_total / 1e6, 3), '999,990.000') cc_secs_per_exec,
TO_CHAR(ROUND(h.plsexec_time_total / h.executions_total / 1e6, 3), '999,990.000') pl_secs_per_exec,
TO_CHAR(ROUND(h.javexec_time_total / h.executions_total / 1e6, 3), '999,990.000') ja_secs_per_exec
FROM dba_hist_sqlstat h,
dba_hist_snapshot s
WHERE h.sql_id = '&sql_id'
AND h.executions_total > 0
AND s.snap_id = h.snap_id
AND s.dbid = h.dbid
AND s.instance_number = h.instance_number
UNION ALL
SELECT 'gv$sqlarea_plan_hash' source,h.inst_id,
TO_CHAR(sysdate, 'DD-MM-YYYY HH24:MI') snap_time,
TO_CHAR(sysdate, 'DD-MM-YYYY HH24:MI') end_time,
h.sql_id,
h.plan_hash_value,
h.executions,
TO_CHAR(ROUND(h.rows_processed / h.executions), '999,999,999,999') rows_per_exec,
TO_CHAR(ROUND(h.elapsed_time / h.executions / 1e6, 3), '999,990.000') et_secs_per_exec,
TO_CHAR(ROUND(h.cpu_time / h.executions / 1e6, 3), '999,990.000') cpu_secs_per_exec,
TO_CHAR(ROUND(h.USER_IO_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') io_secs_per_exec,
TO_CHAR(ROUND(h.CLUSTER_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') cl_secs_per_exec,
TO_CHAR(ROUND(h.APPLICATION_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') ap_secs_per_exec,
TO_CHAR(ROUND(h.CLUSTER_WAIT_TIME / h.executions / 1e6, 3), '999,990.000') cc_secs_per_exec,
TO_CHAR(ROUND(h.PLSQL_EXEC_TIME / h.executions / 1e6, 3), '999,990.000') pl_secs_per_exec,
TO_CHAR(ROUND(h.JAVA_EXEC_TIME / h.executions / 1e6, 3), '999,990.000') ja_secs_per_exec
FROM gv$sqlarea_plan_hash h
WHERE h.sql_id = '&sql_id'
AND h.executions > 0
order by source ;
12. Find Stale Stats
http://www.br8dba.com/statistics/
exec DBMS_STATS.FLUSH_DATABASE_MONITORING_INFO;
select OWNER,TABLE_NAME,LAST_ANALYZED,STALE_STATS from DBA_TAB_STATISTICS where STALE_STATS='YES' and OWNER='&owner;
*** statistics of objects of a specific sql id
set lines 300 set pages 300
col table_name for a40
col owner for a30
select distinct owner, table_name, STALE_STATS, last_analyzed, stattype_locked
from dba_tab_statistics
where (owner, table_name) in
(select distinct owner, table_name
from dba_tables
where ( table_name)
in ( select object_name
from gv$sql_plan
where upper(sql_id) = upper('&sql_id') and object_name is not null))
--and STALE_STATS='YES'
/
13. Gather Stats
http://www.br8dba.com/statistics/
http://www.br8dba.com/oracle-histograms/
14. PIN Optimal Plan
-- Run below script, you can download this script from SQLT
-- Reference: http://www.br8dba.com/how-to-create-custom-sql-profile/
@coe_xfr_sql_monitor.sql <sql_id> <plan_hash_value> -- to create SQL profile
The coe_xfr_sql_profile.sql script would create another sql file, which should be run to create manual sql profile for the sql
The new sql file created.
ls -ltr coe_xfr_sql_profile_<sql_id>_<plan_hash_value>.sql
cat coe_xfr_sql_profile_<sql_id>_<plan_hash_value>.sql
@coe_xfr_sql_profile_<sql_id>_<plan_hash_value>.sql
15. Find Fragmentation
*** Table Fragmentation
select
table_name,round((blocks*8),2) "size (kb)" ,
round((num_rows*avg_row_len/1024),2) "actual_data (kb)",
(round((blocks*8),2) - round((num_rows*avg_row_len/1024),2)) "wasted_space (kb)"
from
dba_tables
where owner='&OWNER' and table_name='&TABLE_NAME' and
(round((blocks*8),2) > round((num_rows*avg_row_len/1024),2))
order by 4 desc;
16. De-Fragmentation
*** There are many methods.
Option 1: Shrink command
alter table enable row movement;
/*
Using the enable row movement clause can reduce the clustering_factor for a primary access index, causing excessive I/O. Oracle introduced the sorted gash cluster as a way to keep an index in-order with the table rows, a technique that greatly reduces I/O for common queries.
Beware that using "enable row movement" can cause Oracle to move rows to discontinuous data blocks, causing a performance problem. Remember, the physical placement of rows on data blocks can still make a huge difference in query performance.
*/
alter table shrink space compact;
alter table shrink space cascade;
http://www.dba-oracle.com/t_enable_row_movement.htm
Option 2: Table move
Alter table move - The alter table xxx move command moves rows down into un-used space and adjusts the HWM but does not adjust the segments extents, and the table size remains the same. The alter table move syntax also preserves the index and constraint definitions.
ALTER TABLE <table_name> MOVE;
Option 3: EXPORT / IMPORT
** EXPORT
** DROP ALL RESPECTIVE OBJECTS
** IMPORT FROM EXPORT BACKUP
Option 4: EXPORT / IMPORT WITH TABLE_EXISTS_ACTION=REPLACE
** EXPORT
** IMPORT USING TABLE_EXISTS_ACTION=REPLACE
Option 5: Other methods
