Saturday 26 October 2019

query is running slow --session wait query

Active session


select sid, serial#, username, status, sql_id,to_char(LOGON_TIME, 'DD-MON-YYYY HH24:MI:SS') AS LOGON, event from v$session where username='&username';

SELECT sql_id, status, sql_text FROM v$sql_monitor WHERE  username='&username' and status not like '%DONE%';

monitor the sql execution plan whether its hangs or not .. execute two or three times to check the rows are changing


column plan_line_id format 9999 heading 'LINE'
column plan_options format a10 heading 'OPTIONS'
column status format a10
column output_rows heading 'ROWS'
break on sid on sql_id on status
SELECT sid, sql_id, status, plan_line_id,
plan_operation || ' ' || plan_options operation, output_rows
FROM v$sql_plan_monitor
WHERE status not like '%DONE%' and sid='&sid' <---
ORDER BY 1,4;

-- OR ---

column plan_line_id format 9999 heading 'LINE'
column plan_options format a10 heading 'OPTIONS'
column status format a10
column output_rows heading 'ROWS'
break on sid on sql_id on status
SELECT sid, sql_id, status, plan_line_id,
plan_operation || ' ' || plan_options operation, output_rows
FROM v$sql_plan_monitor
WHERE status not like '%DONE%'
ORDER BY 1,4;



Oracle current session wait



SET TIME ON VERIFY OFF
set linesize 200
COLUMN event FORMAT A30 HEADING 'Event' TRUNCATE
COLUMN wait_state FORMAT A7 HEADING 'State'
COLUMN seconds_in_wait FORMAT 999999999 HEADING 'Time|Waiting'
COLUMN wait_time FORMAT 999999 HEADING 'Time|Waited'
COLUMN p1 FORMAT A20 HEADING 'P1' TRUNCATE
COLUMN p2 FORMAT A20 HEADING 'P2' TRUNCATE
COLUMN p3 FORMAT A20 HEADING 'P3' TRUNCATE
col sid_serial format a15
col username format a20

SELECT vs.sid||','||vs.serial# sid_serial,
vs.username username,
vs.event,
CASE WHEN vs.state = 'WAITING' THEN vs.state
ELSE 'WAITED'
END wait_state,
vs.seconds_in_wait,
vs.wait_time,
DECODE(vs.p1text, NULL, NULL, vs.p1text||'='||vs.p1) p1,
DECODE(vs.p2text, NULL, NULL, vs.p2text||'='||vs.p2) p2,
DECODE(vs.p3text, NULL, NULL, vs.p3text||'='||vs.p3) p3
FROM v$session vs



3) REPORT_SQL_MONITOR in HTML (OR) TEXT format

SET LONG 1000000
SET LONGCHUNKSIZE 1000000
SET LINESIZE 1000
SET PAGESIZE 0
SET TRIM ON
SET TRIMSPOOL ON
SET ECHO OFF
SET FEEDBACK OFF

SPOOL report_sql_monitor.txt
SELECT DBMS_SQLTUNE.report_sql_monitor(
  sql_id       => 'jjxdhjkk3vp', <--- SQLID
  type         => 'TEXT',         <--- HTML
  report_level => 'ALL') AS report
FROM dual;
SPOOL OFF




Oracle Response Time report


SET LINESIZE 132 PAGESIZE 100 FEEDBACK OFF
COLUMN time_sum NOPRINT
COLUMN total_time NOPRINT
COLUMN wait_class FORMAT A15 HEADING 'Class'
COLUMN event FORMAT A40 HEADING 'Event'
COLUMN wait_seconds FORMAT 999,999,999,999.99 HEADING 'Wait Seconds'
COLUMN wait_pct FORMAT 99.999999 HEADING '% of T' NOPRINT
COLUMN nonidle_pct FORMAT 99.999999 HEADING '% of R'

BREAK ON wait_class SKIP PAGE
COMPUTE SUM OF wait_seconds nonidle_pct ON wait_class

TTITLE LEFT "*** Response Time Components by Class ***"

SELECT vswc.time_waited time_sum,
ven.wait_class,
vse.event,
ROUND((vse.time_waited_micro/1000000),4) wait_seconds,
instime.time_waited total_time,
(ROUND((vse.time_waited_micro/1000000),6)/(instime.time_waited/100))*100 wait_pct,
TO_NUMBER(DECODE(vswc.wait_class, 'Idle', NULL, 'Network', NULL,
(ROUND((vse.time_waited_micro/1000000),6)/
((instime.time_waited - idletime.time_waited)/100))*100)) nonidle_pct
FROM v$system_event vse,
v$event_name ven,
v$system_wait_class vswc,
(SELECT SUM(time_waited) time_waited
FROM (SELECT time_waited
FROM v$system_wait_class
UNION
SELECT value
FROM v$sysstat
WHERE name = 'CPU used when call started')) instime,
(SELECT SUM(time_waited) time_waited
FROM v$system_wait_class
WHERE wait_class IN ('Idle', 'Network')) idletime
WHERE ven.event_id = vse.event_id
AND vswc.wait_class = ven.wait_class
UNION
SELECT vss.value time_sum,
'CPU Utilization' wait_class,
NULL,
vss.value/100 wait_seconds,
instime.time_waited total_time,
(ROUND((vss.value/100),6)/(instime.time_waited/100))*100 wait_pct,
((ROUND((vss.value/100),6)/((instime.time_waited - idletime.time_waited)/100))*100) nonidle_pct
FROM v$sysstat vss,
(SELECT SUM(time_waited) time_waited
FROM (SELECT time_waited
FROM v$system_wait_class
UNION
SELECT value
FROM v$sysstat
WHERE name = 'CPU used when call started')) instime,
(SELECT SUM(time_waited) time_waited
FROM v$system_wait_class
WHERE wait_class IN ('Idle', 'Network')) idletime
WHERE vss.name = 'CPU used when call started'
ORDER BY time_sum, wait_class, wait_seconds DESC
/

CLEAR BREAK
CLEAR COMPUTE

TTITLE LEFT "*** Response Time Components by Time ***"

SELECT vse.event,
ROUND((vse.time_waited_micro/1000000),4) wait_seconds,
(ROUND((vse.time_waited_micro/1000000),6)/((nonidletime.time_waited)/100))*100 nonidle_pct
FROM v$system_event vse,
v$event_name ven,
v$system_wait_class vswc,
(SELECT SUM(time_waited) time_waited
FROM (SELECT time_waited
FROM v$system_wait_class
WHERE wait_class NOT IN ('Idle', 'Network')
UNION
SELECT value
FROM v$sysstat
WHERE name = 'CPU used when call started')) nonidletime
WHERE ven.event_id = vse.event_id
AND vswc.wait_class = ven.wait_class
AND vswc.wait_class NOT IN ('Idle', 'Network')
UNION
SELECT 'CPU Utilization' wait_class,
vss.value/100 wait_seconds,
(ROUND((vss.value/100),6)/((nonidletime.time_waited)/100))*100 nonidle_pct
FROM v$sysstat vss,
(SELECT SUM(time_waited) time_waited
FROM (SELECT time_waited
FROM v$system_wait_class
WHERE wait_class NOT IN ('Idle', 'Network')
UNION
SELECT value
FROM v$sysstat
WHERE name = 'CPU used when call started')) nonidletime
WHERE vss.name = 'CPU used when call started'
ORDER BY wait_seconds DESC
/

Oracle Session Wait on single instance / RAC


Currently connected sessions waits, longops, sql, etc...
Oracle Wait info



select/*+ rule*/ distinct--because of multiple records in v$sql may exist
to_char(gv$session.LOGON_TIME,'YYYY.MM.DD HH24:MI:SS') as LOGON_TIME
, gv$session.STATUS
, gv$session.USERNAME
, gv$session.PROGRAM
, gv$session.INST_ID
, gv$session.SID
, gv$session.SERIAL#
, gv$transaction.START_TIME as TX_STIME
, gv$session.LAST_CALL_ET as LAST_CALL_ET
, gv$session_wait.EVENT
, v$latchname.NAME as LATCHNAME
, gv$session_wait.SECONDS_IN_WAIT
, dba_objects.owner||'.'||dba_objects.object_name req_object
, decode(nvl(gv$session.ROW_WAIT_OBJ#,-1),-1,'NONE',DBMS_ROWID.ROWID_CREATE( 1,
gv$session.ROW_WAIT_OBJ#, gv$session.ROW_WAIT_FILE#, gv$session.ROW_WAIT_BLOCK#,
gv$session.ROW_WAIT_ROW# )) req_rowid
, lockhold.inst_id as BLOCKING_INSTANCE
, lockhold.sid as BLOCKING_SESSION
, gv$session.COMMAND
, gv$session_longops.TIME_REMAINING as LONGOPS_CALL_RT
, gv$session_longops.MESSAGE as LONGOPS_MESSAGE
, gv$session_wait.P1
, gv$session_wait.P1TEXT
, gv$session_wait.P2 P2
, gv$session_wait.P2TEXT
, gv$session_wait.P3
, gv$session_wait.P3TEXT
, gv$sql.ADDRESS as SQL_ADDRESS
, gv$sql.HASH_VALUE as HASH_VALUE
, gv$sql.PLAN_HASH_VALUE as PLAN_HASH_VALUE
, gv$sql.OPTIMIZER_MODE as SQL_OPTIMIZER_MODE
, gv$sql.sql_text as SQL_TEXT
, sql1.ADDRESS as PREV_SQL_ADDRESS
, sql1.HASH_VALUE as PREV_HASH_VALUE
, sql1.PLAN_HASH_VALUE as PREV_PLAN_HASH_VALUE
, sql1.OPTIMIZER_MODE as PREV_SQL_OPTIMIZER_MODE
, sql1.sql_text as PREV_sql_text
--Network connection properties
, gv$session.SERVER
, gv$session.FAILOVER_TYPE
, gv$session.FAILOVER_METHOD
, gv$session.FAILED_OVER
, gv$session.FIXED_TABLE_SEQUENCE
--OS properties
, gv$session.MACHINE
, gv$session.MODULE
, gv$session.OSUSER
, gv$session.OWNERID
, gv$session.TERMINAL
, 'Alter system kill session '''||gv$session.SID||','||gv$session.SERIAL#||''';'
as KILL_SESSION
, gv$instance.HOST_NAME
, 'kill '||gv$process.SPID as KILL_SPID
from gv$session
, gv$instance
, gv$process
, gv$session_wait
, gv$sql
, gv$sql sql1
, gv$transaction
, v$latchname
, dba_objects
, gv$session_longops
, gv$lock lockwait
, gv$lock lockhold
where gv$session.INST_ID = gv$instance.INST_ID
and gv$session.PADDR=gv$process.ADDR(+)
and gv$session.INST_ID = gv$process.INST_ID(+)
and gv$session.sql_address=gv$sql.address(+)
and gv$session.INST_ID = gv$sql.INST_ID(+)
and gv$session.sql_hash_value=gv$sql.hash_value(+)
and gv$session.PREV_SQL_ADDR = sql1.address(+)
and gv$session.PREV_HASH_VALUE = sql1.hash_value(+)
and gv$session.SID=gv$session_wait.SID(+)
and gv$session.INST_ID = gv$session_wait.INST_ID(+)
and gv$session.SADDR=gv$transaction.SES_ADDR(+)
and gv$session.INST_ID = gv$transaction.INST_ID(+)
and (gv$session.SERIAL# <> 1 or upper(gv$session.PROGRAM) like '%LGWR%'
or upper(gv$session.PROGRAM) like '%DBW%' )--System session excluded,exc. DBWR
and upper(gv$session.PROGRAM) not like '%QMNC%'--Queue Monitor Coordinator excluded
and upper(gv$session.PROGRAM) not like '%Q0%'--Queue monitor processes excluded
and gv$session_wait.P2=v$latchname.LATCH#(+)
and gv$session.ROW_WAIT_OBJ# = dba_objects.object_id(+)
and gv$session.SID = gv$session_longops.sid(+)
and gv$session.INST_ID = gv$session_longops.INST_ID(+)
and gv$session.SERIAL# = gv$session_longops.SERIAL#(+)
and gv$session.sql_address = gv$session_longops.SQL_ADDRESS(+)
and gv$session.sql_hash_value = gv$session_longops.SQL_HASH_VALUE(+)
and nvl(gv$session_longops.SOFAR,0) <> nvl(gv$session_longops.TOTALWORK,1)
and gv$session.LOCKWAIT = lockwait.KADDR(+)
and lockwait.id1 = lockhold.id1(+)
and lockwait.id2 = lockhold.id2(+)
and nvl(lockwait.REQUEST,1) > 0
and nvl(lockwait.LMODE,0) = 0
and nvl(lockhold.REQUEST,0) = 0
and nvl(lockhold.LMODE,1) > 0
and nvl(lockwait.SID,0) <> nvl(lockhold.SID,1)
order by tx_stime, status, LOGON_TIME, username, machine asc;

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