Where did track information / elapsed time go?
Just lost my track information during listening to a song. The scrollbar has gone and so did the elapsed time / time to go counter. Where can I find it back?
Thanks a lot!
To have the scrubber available for the song that is playing - which is what you are referring to, tap on the album cover art area for the song that is playing.
Similar Messages
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Check Scan for NI435X and elapsed time doesn't run in loop
Dear all Labview Experts
i have 2 questions
(1) i written program with Check Scan for NI435X (input to no of scan to NI 435X read ) and one with only NI435X read( to read in voltage) with constant input to no of scan,
the data i obtained is attached in 2 doucments; With Check Scan and without check scan ( the left column is temperature read in ( a formula is used to convert volt to temperature, right column is time)
strangely the program with check scan shows values in negative ==> Voltage read in is 0, strange, why is this so??? and why is there a diff?? Hope u understand my question
(2) For elapsed time, i want to find the total elapsed time for the whole program as well as individual cases, there is no "running" elapsed time or individual running time,
what happen is that when the each case end, the time will jump (e.g. from 0 at start, it will change to 5.35 at end of case) , is there any where to make the time run, i need it because some case required
c
ondition such as case will move to next after 5 seconds, but if above case happen, the vi will only stop if i put >= 5 rather than just place = 5
hope u understand,
does it help if i placed the condition as another loop , will it mean the same things
Attach are vi and some doucments, however as my vi contains PID tool kit as will as ni435x ni DC power which cannot be opened if you do
not have these kits.......however mayb u can help to look at the portion of timing as this is the main problem i faced now.........
Hope it is not too confusing for you to understand me...........
i can only attach max 3, the next post i will attach 2 vis...........
Attachments:
Picture of check scan and without.rtf 15 KB
With Check Scan.txt 4 KB
Without Check Scan.txt 1 KBThks Brian
Attached are 3 VIs
1.the first vi is the one with the check scan
2. the next two vi the only diff is the placement of the where i put the elapsed time and time of each case.........(without check scan)--the first
one is within the big loop, the other outside big loop -- the purpose i did this is because when i run the vi with the timing in the big loop, the timing does not run continuously but "skip". for e.g. Denature time: from 0 . it jump to 5.15s without showing the running.............
i will attached another 2 vi s in my next attachment
Hope this clarifies a bit
your help is really appreciated
thks
Attachments:
PCR Control_State Machine_4 channel_Timing within Loop.vi 438 KB
PCR Control_State Machine_4 channel_with_check scan.vi 443 KB
PCR Control_State Machine_4 channel_Timing outside of loop.vi 442 KB -
After using time machine my users folder cannot be seen, but all information is still intact. Where did it go?
This is a new feature or bug if you want to call it that in OS X 10.9.3
Until Apple fixes this, here is a temporary work around.
Copy and paste the following command in the Terminal and then hit Enter, followed by your password.
sudo ln -s /Users /Users\ Folder; ln -s /Users/Shared /Users/Shared\ Folder
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Dbms_lob , where did my time go ?
Hi all
After using 10046 to identify the sql that is causing the slowness in a program “ less commits cause my program to go slower” i realised that i am missing something ,
There was a lot of time missing in the tkprof file , and no sql or wait event allocate the missing time , so i put the following test case together in an attempt to understand where the time is going .
Version of test database : 11.1.0.6.0
Name of test database: stdby ( :-) used my standby database)
Database non-default values
# Parameter Value1
1: audit_file_dest /u01/app/oracle/admin/stdby/adump
2: audit_trail DB
3: compatible 11.1.0.0.0
4: control_files /u01/app/oracle/oradata/stdby/control01.ctl
5: control_files /u01/app/oracle/oradata/stdby/control02.ctl
6: control_files /u01/app/oracle/oradata/stdby/control03.ctl
7: db_block_size 8192
8: db_domain
9: db_name stdby
10: db_recovery_file_dest /u01/app/oracle/flash_recovery_area
11: db_recovery_file_dest_size 2147483648
12: diagnostic_dest /u01/app/oracle
13: dispatchers (PROTOCOL=TCP) (SERVICE=stdbyXDB)
14: memory_target 314572800
15: open_cursors 300
16: processes 150
17: remote_login_passwordfile EXCLUSIVE
18: undo_tablespace UNDOTBS1More accurately I used existing example from http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:4084920819312
I hope Tom does not mind .
create table t ( x clob );
create or replace procedure p( p_open_close in boolean default false,
p_iters in number default 100 )
as
l_clob clob;
begin
insert into t (x) values ( empty_clob() )
returning x into l_clob;
if ( p_open_close )
then
dbms_lob.open( l_clob, dbms_lob.lob_readwrite );
end if;
for i in 1 .. p_iters
loop
dbms_lob.WriteAppend( l_clob, 5, 'abcde' );
end loop;
if ( p_open_close )
then
dbms_lob.close( l_clob );
end if;
commit;
end;I did the tracing and the run of the pkg with this
alter session set timed_statistics = true;
alter session set max_dump_file_size = unlimited;
alter session set tracefile_identifier = 'test_clob_commit';
alter session set events '10046 trace name context forever, level 12';
exec p(TRUE,20000);
exitDid the tkprof of the 10046 trace file with
tkprof stdby_ora_3656_test_clob_commit.trc stdby_ora_3656_test_clob_commit.trc.tkp sort=(prsela,exeela,fchela) aggregate=yes waits=yes sys=yesWith output of
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 1 0.02 0.02 0 0 0 0
Execute 1 46.89 147.81 38915 235267 492471 1
Fetch 0 0.00 0.00 0 0 0 0
total 2 46.92 147.83 38915 235267 492471 1
Misses in library cache during parse: 1
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 2 0.00 0.00
SQL*Net message from client 2 0.00 0.00
latch: shared pool 24 0.05 0.07
latch: row cache objects 2 0.00 0.00
log file sync 1 0.01 0.01
OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS
call count cpu elapsed disk query current rows
Parse 117 0.11 0.10 0 0 2 0
Execute 426 0.37 0.40 6 4 9 2
Fetch 645 0.17 0.51 63 1507 0 1952
total 1188 0.65 1.03 69 1511 11 1954
Misses in library cache during parse: 22
Misses in library cache during execute: 22
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 19778 1.12 30.31
direct path write 19209 0.00 0.44
direct path read 19206 0.00 0.37
log file switch completion 8 0.20 0.70
latch: cache buffers lru chain 5 0.01 0.02
3 user SQL statements in session.
424 internal SQL statements in session.
427 SQL statements in session.And it’s here where the time is being lost.The time of the main pkg p(TRUE,2000) takes 147.83 sec, which is correct , but what is making this time up.
From sorted trace file
SQL ID : catnjk0zv6jz1
BEGIN p(TRUE,20000); END;
call count cpu elapsed disk query current rows
Parse 1 0.02 0.02 0 0 0 0
Execute 1 46.89 147.81 38915 235267 492471 1
Fetch 0 0.00 0.00 0 0 0 0
total 2 46.92 147.83 38915 235267 492471 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 81
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
latch: shared pool 24 0.05 0.07
latch: row cache objects 2 0.00 0.00
log file sync 1 0.01 0.01
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 0.00 0.00
SQL ID : db78fxqxwxt7r
select /*+ rule */ bucket, endpoint, col#, epvalue
from
histgrm$ where obj#=:1 and intcol#=:2 and row#=:3 order by bucket
intresting , oracle is still using the rule hint in 11g ?
call count cpu elapsed disk query current rows
Parse 3 0.00 0.00 0 0 0 0
Execute 98 0.05 0.05 0 0 0 0
Fetch 98 0.04 0.17 28 294 0 1538
total 199 0.10 0.22 28 294 0 1538
Misses in library cache during parse: 0
Optimizer mode: RULE
Parsing user id: SYS (recursive depth: 3)
Rows Row Source Operation
20 SORT ORDER BY (cr=3 pr=1 pw=1 time=8 us cost=0 size=0 card=0)
20 TABLE ACCESS CLUSTER HISTGRM$ (cr=3 pr=1 pw=1 time=11 us)
1 INDEX UNIQUE SCAN I_OBJ#_INTCOL# (cr=2 pr=0 pw=0 time=0 us)(object id 408)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 28 0.02 0.12
SQL ID : 5n1fs4m2n2y0r
select pos#,intcol#,col#,spare1,bo#,spare2,spare3
from
icol$ where obj#=:1
call count cpu elapsed disk query current rows
Parse 2 0.00 0.00 0 0 0 0
Execute 19 0.03 0.03 0 0 0 0
Fetch 60 0.00 0.04 1 120 0 41
total 81 0.04 0.08 1 120 0 41
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer mode: CHOOSE
Parsing user id: SYS (recursive depth: 2)
Rows Row Source Operation
1 TABLE ACCESS BY INDEX ROWID ICOL$ (cr=4 pr=0 pw=0 time=0 us cost=2 size=54 card=2)
1 INDEX RANGE SCAN I_ICOL1 (cr=3 pr=0 pw=0 time=0 us cost=1 size=0 card=2)(object id 42)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 1 0.04 0.04None of the parse , execute ,fetch and wait times makes up the 147.83 seconds.
So i turned to oracles trcanlzr.sql that Carlos Sierra wrote and parsed the same trace file to find the offending sql .
And it starts getting intrestting
Trace Analyzer 11.2.6.2 Report: trcanlzr_75835.html
stdby_ora_3656_test_clob_commit.trc (6970486 bytes)
Total Trace Response Time: 148.901 secs.
2009-MAY-03 20:03:51.771 (start of first db call in trace).
2009-MAY-03 20:06:20.672 (end of last db call in trace).
RESPONSE TIME SUMMARY
~~~~~~~~~~~~~~~~~~~~~
pct of pct of pct of
Time total Time total Time total
Response Time Component (in secs) resp time (in secs) resp time (in secs) resp time
CPU: 47.579 32.0%
Non-idle Wait: 0.467 0.3%
ET Unaccounted-for: 100.825 67.7%
Total Elapsed(1): 148.871 100.0%
Idle Wait: 0.001 0.0%
RT Unaccounted-for: 0.029 0.0%
Total Response(2): 148.901 100.0%
(1) Total Elapsed = "CPU" + "Non-Idle Wait" + "ET Unaccounted-for".
(2) Total Response = "Total Elapsed Time" + "Idle Wait" + "RT Unaccounted-for".
Total Accounted-for = "CPU" + "Non-Idle Wait" + "Idle Wait" = 148.872 secs.
Total Unccounted-for = "ET Unaccounted-for" + "RT Unaccounted-for" = 100.854 secs.{font:Courier}
{color:red}
{size:19}100.825 seconds Wow , that is a lot 67.7 % of the time is not accounted for {size}
{color}
{font}
I even used TVD$XTAT TriVaDis eXtended Tracefile Analysis Tool with the same conclution .
{font:Courier}
{color:green}
{size:19}Looking at the raw trace file i see a lot of lines like this{size}
{color}
{font}
WAIT #7: nam='direct path read' ela= 11 file number=4 first dba=355935 block cnt=1 obj#=71067 tim=1241337833498756
WAIT #7: nam='direct path write' ela= 12 file number=4 first dba=355936 block cnt=1 obj#=71067 tim=1241337833499153
WAIT #7: nam='db file sequential read' ela= 1095 file#=4 block#=399 blocks=1 obj#=71067 tim=1241337833501366{font:Courier}
{color:green}
{size:19}
What is even more interesting is the sql for "PARSING IN CURSOR #7" is not in the trace file !
The question is where is the time going or is the parser of the 10046 trace file just not putting the detail in ? How do i fix this, without speculating, if I do not know where the problem is ?
I thought of doing a strace on the process . Where else can i look for my 100 sec
Please point me in a direction where i can look for my 100,825 seconds as this is a test case with a production system that is loosing the same amount of time but with a lot more sql arround its dbms_lob.writeappend.
{size}
{color}
{font}
Edited by: user5174849 on 2009/05/16 11:17 PMuser5174849 wrote:
After using 10046 to identify the sql that is causing the slowness in a program “ less commits cause my program to go slower” i realised that i am missing something ,
There was a lot of time missing in the tkprof file , and no sql or wait event allocate the missing time , so i put the following test case together in an attempt to understand where the time is going .
Version of test database : 11.1.0.6.0
What is even more interesting is the sql for "PARSING IN CURSOR #7" is not in the trace file !
The question is where is the time going or is the parser of the 10046 trace file just not putting the detail in ? How do i fix this, without speculating, if I do not know where the problem is ?
I thought of doing a strace on the process . Where else can i look for my 100 sec
Please point me in a direction where i can look for my 100,825 seconds as this is a test case with a production system that is loosing the same amount of time but with a lot more sql arround its dbms_lob.writeappend.I guess that the separate cursor that is opened for the LOB operation is where the time is spent, and unfortunately this part is not very well exposed via the usual interfaces (V$SQL, 10046 trace file etc).
You might want to read this post where Kerry identifies the offending SQL via V$OPEN_CURSOR: http://kerryosborne.oracle-guy.com/2009/04/hidden-sql-why-cant-i-find-my-sql-text/
The waits of this cursor #7 are quite likely rather relevant since they probably show you what the LOB operation is waiting for.
The LOB is created with the default NOCACHE attribute therefore it's read and written using direct path operations.
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/ -
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Hi
I do
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ORA-1555 ORA-3136 errors:: elapsed time vs Query Duration
Dear all,
- My Database version is 11.2.0.2, Solaris.
- We have been having a problem in the production database where the front end nodes start going up and down for couple of hours sometimes. ; When node flapping is going on we get connection timed out alerts.
WARNING: inbound connection timed out (ORA-3136) opiodr aborting
process unknown ospid (4342) as a result of ORA-609 opiodr aborting
process unknown ospid (4532) as a result of ORA-609 opiodr aborting
process unknown ospid (4534) as a result of ORA-609 opiodr aborting....
Since this week node flapping is happening every day. Since past 2 days after or during node flapping we are getting ORA-1555 error.
Extract from alert log error:
ORA-01555 caused by SQL statement below (SQL ID: g8804k5pkmtyt, Query Duration=19443 sec, SCN: 0x0001.07bd90ed):
SELECT d.devId, d.vendor, d.model, d.productClass, d.oui, d.parentDeviceId, d.created, d.lastModified AS devLastMod, d.customerId, d.userKey1, d.userKey2, d.userKey4, d
.userKey5, d.firmwareFamily, d.softwareVer, d.serialNum, d.ip, d.mac, d.userKey3, d.userKey6, d.provisioningId, d.status, d.classification, d.population, d.name, d.ipRe
solver, d.ipExpirationTime, d.geoLocationId,contact.firstContactTime, ifaces.id, ifaces.type AS ifaceType, ifaces.lastModified AS ifaceLastMod, ifaces.timeoutname, ifac
es.username1, ifaces.password1, ifaces.username2, ifaces.password2, ifaces.connReqUrl, ifaces.connReqScheme, ifaces.srvNonce, ifaces.deviceNonce, ifaces.phoneNumber,ifa
ces.bootstrapSecMethod, ifaces.srvAuthentication, ifaces.deviceAuthentication, ifaces.userPIN, ifaces.networkID, ifaces.omaSessionID, ifaces.portNum, ifaces.mgtIp, ifac
es.cmtsIp, ifaces.mgtReadCommunity, ifaces.mgtWriteCommunity, ifaces.cmtsReadCommunity, ifaces.cmtsWriteCommunity, devto.name AS devtoName, devto.rebootTimeout, devto.sessionInitiationI run Statspack report from the whole day duration, and looking into the elapsed time in seconds no more than 3739.61 sec (too lower than run duration in the alert log file of 19443 sec); So I would like to know if there is any co-relations between the ORA-3136 errors and the ORA-1555 errors?
CPU CPU per Elapsd Old
Time (s) Executions Exec (s) %Total Time (s) Buffer Gets Hash Value
tTime <= :3 ) AND (endTime IS NULL OR endTime >= :4 )
2773.77 7,787,914 0.00 3.4 3739.61 112,671,645 1909376826
Module: JDBC Thin Client
SELECT d.devId, d.vendor, d.model, d.productClass, d.oui, d.pare
ntDeviceId, d.created, d.lastModified AS devLastMod, d.customerI
d, d.userKey1, d.userKey2, d.userKey4, d.userKey5, d.firmwareFam
ily, d.softwareVer, d.serialNum, d.ip, d.mac, d.userKey3, d.user
SQL> show parameter UNDO_MANAGEMENT
NAME TYPE VALUE
undo_management string AUTO
SQL> show parameter UNDO_RETENTION
NAME TYPE VALUE
undo_retention integer 10800BR,
DiegoThank you. Please let me know if it is enough or you need more information;
SQL ordered by Gets DB/Inst: DB01/db01 Snaps: 14835-14846
-> End Buffer Gets Threshold: 100000 Total Buffer Gets: 677,689,568
-> Captured SQL accounts for 73.6% of Total Buffer Gets
-> SQL reported below exceeded 1.0% of Total Buffer Gets
CPU Elapsd Old
Buffer Gets Executions Gets per Exec %Total Time (s) Time (s) Hash Value
21,286,248 2,632,793 8.1 3.4 666.73 666.76 3610154549
Module: JDBC Thin Client
SELECT d.devId, d.vendor, d.model, d.productClass, d.oui, d.pare
ntDeviceId, d.created, d.lastModified AS devLastMod, d.customerI
d, d.userKey1, d.userKey2, d.userKey4, d.userKey5, d.firmwareFam
ily, d.softwareVer, d.serialNum, d.ip, d.mac, d.userKey3, d.user
17,029,561 1,176,849 14.5 2.7 417.32 416.73 1909376826
Module: JDBC Thin Client
SELECT d.devId, d.vendor, d.model, d.productClass, d.oui, d.pare
ntDeviceId, d.created, d.lastModified AS devLastMod, d.customerI
d, d.userKey1, d.userKey2, d.userKey4, d.userKey5, d.firmwareFam
ily, d.softwareVer, d.serialNum, d.ip, d.mac, d.userKey3, d.user
17,006,795 37 459,643.1 2.7 367.61 368.95 4045552861
Module: JDBC Thin Client
SELECT d.devId, d.vendor, d.model, d.productClass, d.oui, d.pare
ntDeviceId, d.created, d.lastModified AS devLastMod, d.customerI
d, d.userKey1, d.userKey2, d.userKey4, d.userKey5, d.firmwareFam
ily, d.softwareVer, d.serialNum, d.ip, d.mac, d.userKey3, d.userAnother Statspack report for the whole day shows;
SQL ordered by CPU DB/Inst: DB01/db01 Snaps: 14822-14847
-> Total DB CPU (s): 82,134
-> Captured SQL accounts for 40.9% of Total DB CPU
-> SQL reported below exceeded 1.0% of Total DB CPU
CPU CPU per Elapsd Old
Time (s) Executions Exec (s) %Total Time (s) Buffer Gets Hash Value
tTime <= :3 ) AND (endTime IS NULL OR endTime >= :4 )
2773.77 7,787,914 0.00 3.4 3739.61 112,671,645 1909376826
Module: JDBC Thin Client
SELECT d.devId, d.vendor, d.model, d.productClass, d.oui, d.pare
ntDeviceId, d.created, d.lastModified AS devLastMod, d.customerI
d, d.userKey1, d.userKey2, d.userKey4, d.userKey5, d.firmwareFam
ily, d.softwareVer, d.serialNum, d.ip, d.mac, d.userKey3, d.user
SQL ordered by Gets DB/Inst: DB01/db01 Snaps: 14822-14847
-> End Buffer Gets Threshold: 100000 Total Buffer Gets: 1,416,456,340
-> Captured SQL accounts for 55.8% of Total Buffer Gets
-> SQL reported below exceeded 1.0% of Total Buffer Gets
CPU Elapsd Old
Buffer Gets Executions Gets per Exec %Total Time (s) Time (s) Hash Value
86,354,963 7,834,326 11.0 6.3 2557.34 2604.08 906944860
Module: JDBC Thin Client
SELECT d.devId, d.vendor, d.model, d.productClass, d.oui, d.pare
ntDeviceId, d.created, d.lastModified AS devLastMod, d.customerI
d, d.userKey1, d.userKey2, d.userKey4, d.userKey5, d.firmwareFam
ily, d.softwareVer, d.serialNum, d.ip, d.mac, d.userKey3, d.user
.....BR,
Diego
Edited by: 899660 on 27-ene-2012 7:43
Edited by: 899660 on 27-ene-2012 7:45 -
Diffrence between cpu and elapse time in tkprof
Hi All
i found huge diffrence between cpu and elapsed time in tkprof. can you please advice me on this issue.
>call count cpu elapsed disk query current rows
==================================================
Parse 1 0.12 1.36 2 11 0 0
Execute 1 14.30 720.20 46548 190520 205 100
Fetch 0 0.00 0.00 0 0 0 0
======================================================
total 2 14.42 721.56 46550 190531 205 100
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 173 (recursive depth: 1)
Elapsed times include waiting on following events:
Event waited on Times waited Max. Wait Total Waited
===========================================
db file sequential read 46544 0.49 632.12
db file scattered read 1 0.00 0.00
my select statement
SELECT cst.customer_id> ,DECODE(COUNT(cr.deposit_date), 0, 0, ROUND(SUM(cr.deposit_date - ps.trx_date) / COUNT(cr.deposit_date))) avgdays
> ,DECODE(COUNT(cr.deposit_date), 0, 0, ROUND(SUM(cr.deposit_date - ps.due_date) / COUNT(cr.deposit_date))) avgdayslate
> ,NVL(SUM(DECODE(SIGN(cr.deposit_date - ps.due_date),1, 1, 0)), 0) newlate
> ,NVL(SUM( DECODE(SIGN(cr.deposit_date - ps.due_date),1, 0, 1)), 0) newontime
>
> FROM ar_receivable_applications_all ra
> ,ar_cash_receipts_all cr
> ,ar_payment_schedules_all ps
> ,zz_ar_customer_summary_all cst
> WHERE ra.cash_receipt_id = cr.cash_receipt_id
> AND ra.apply_date BETWEEN ADD_MONTHS(SYSDATE, -12) AND SYSDATE
> AND ra.status = 'APP'
> AND ra.display = 'Y'
> AND ra.applied_payment_schedule_id = ps.payment_schedule_id
> AND ps.customer_id = cst.customer_id
> AND NVL(ps.receipt_confirmed_flag,'Y') = 'Y'
> group by cst.customer_id ;
Thanks,
Anuuser653066 wrote:
Hi All
i found huge diffrence between cpu and elapsed time in tkprof. can you please advice me on this issue.
call count cpu elapsed disk query current rows
================================================================================
Parse 1 0.12 1.36 2 11 0 0
Execute 1 14.30 720.20 46548 190520 205 100
Fetch 0 0.00 0.00 0 0 0 0
================================================================================
total 2 14.42 721.56 46550 190531 205 100
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 173 (recursive depth: 1)
Elapsed times include waiting on following events:
Event waited on Times waited Max. Wait Total Waited
===========================================================================
db file sequential read 46544 0.49 632.12
db file scattered read 1 0.00 0.00
SELECT cst.customer_id
,DECODE(COUNT(cr.deposit_date), 0, 0, ROUND(SUM(cr.deposit_date - ps.trx_date) / COUNT(cr.deposit_date))) avgdays
,DECODE(COUNT(cr.deposit_date), 0, 0, ROUND(SUM(cr.deposit_date - ps.due_date) / COUNT(cr.deposit_date))) avgdayslate
,NVL(SUM(DECODE(SIGN(cr.deposit_date - ps.due_date),1, 1, 0)), 0) newlate
,NVL(SUM( DECODE(SIGN(cr.deposit_date - ps.due_date),1, 0, 1)), 0) newontime
FROM ar_receivable_applications_all ra
,ar_cash_receipts_all cr
,ar_payment_schedules_all ps
,zz_ar_customer_summary_all cst
WHERE ra.cash_receipt_id = cr.cash_receipt_id
AND ra.apply_date BETWEEN ADD_MONTHS(SYSDATE, -12) AND SYSDATE
AND ra.status = 'APP'
AND ra.display = 'Y'
AND ra.applied_payment_schedule_id = ps.payment_schedule_id
AND ps.customer_id = cst.customer_id
AND NVL(ps.receipt_confirmed_flag,'Y') = 'Y'
group by cst.customer_id ; Toon Koppelaars seems to have pinpointed the problem. Where are the 74 seconds unaccounted for seconds (I might have calculated it incorrectly, but I arrived at 88.08 seconds of unaccounted for time: 721.56 total - 1.36 parse - 632.12 db file sequential reads)?
It is interesting that the maximum wait for a single block read reported by TKPROF is 0.49 seconds - this might be an indication of excessive competition for the server's CPU - processes are waiting in the CPU run queue, and therefore not on the CPU. As Toon indicated, 632.12 of the 721.56 seconds were spent waiting for single block reads to complete with 46,544 blocks read. Note also that the query executed at dep=1, and TKPROF may be providing misleading information about what actually happened during those executions. An example of misleading information:
CREATE TABLE T11 (
C1 NUMBER,
C2 VARCHAR2(30));
CREATE TABLE T12 (
C1 NUMBER,
C2 VARCHAR2(30));
CREATE TABLE T13 (
C1 NUMBER,
C2 VARCHAR2(30));
CREATE TABLE T14 (
C1 NUMBER,
C2 VARCHAR2(30));
CREATE OR REPLACE TRIGGER HPM_T11 AFTER
INSERT OR DELETE OR UPDATE OF C1 ON T11
REFERENCING OLD AS OLDDATA NEW AS NEWDATA FOR EACH ROW
BEGIN
IF INSERTING THEN
INSERT INTO T12
SELECT
ROWNUM,
DBMS_RANDOM.STRING('A',25)
FROM
DUAL
CONNECT BY
LEVEL <= 100;
END IF;
END;
CREATE OR REPLACE TRIGGER HPM_T12 AFTER
INSERT OR DELETE OR UPDATE OF C1 ON T12
REFERENCING OLD AS OLDDATA NEW AS NEWDATA FOR EACH ROW
BEGIN
IF INSERTING THEN
INSERT INTO T13
SELECT
ROWNUM,
DBMS_RANDOM.STRING('A',25)
FROM
DUAL
CONNECT BY
LEVEL <= 100;
END IF;
END;
CREATE OR REPLACE TRIGGER HPM_T13 AFTER
INSERT OR DELETE OR UPDATE OF C1 ON T13
REFERENCING OLD AS OLDDATA NEW AS NEWDATA FOR EACH ROW
BEGIN
IF INSERTING THEN
INSERT INTO T14
SELECT
ROWNUM,
DBMS_RANDOM.STRING('A',25)
FROM
DUAL
CONNECT BY
LEVEL <= 100;
END IF;
END;
ALTER SESSION SET TRACEFILE_IDENTIFIER = 'MY_TEST_FIND_ME2';
ALTER SESSION SET EVENTS '10046 TRACE NAME CONTEXT FOREVER, LEVEL 8';
SET TIMING ON
INSERT INTO T11 VALUES (1,'MY LITTLE TEST CASE');
ALTER SESSION SET EVENTS '10046 TRACE NAME CONTEXT OFF';The partial TKPROF output:
INSERT INTO T11
VALUES
(1,'MY LITTLE TEST CASE')
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 8 0 0
Execute 1 0.00 0.00 0 9788 29 1
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.00 0.00 0 9796 29 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 56
Rows Row Source Operation
0 LOAD TABLE CONVENTIONAL (cr=9788 pr=7 pw=0 time=0 us)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
SQL*Net message to client 1 0.00 0.00
SQL*Net message from client 1 0.00 0.00
SQL ID : 6asaf110fgaqg
INSERT INTO T12 SELECT ROWNUM, DBMS_RANDOM.STRING('A',25) FROM DUAL CONNECT
BY LEVEL <= 100
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.04 0.09 0 2 130 100
Fetch 0 0.00 0.00 0 0 0 0
total 2 0.04 0.09 0 2 130 100
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 56 (recursive depth: 1)
Rows Row Source Operation
0 LOAD TABLE CONVENTIONAL (cr=9754 pr=7 pw=0 time=0 us)
100 COUNT (cr=0 pr=0 pw=0 time=0 us)
100 CONNECT BY WITHOUT FILTERING (cr=0 pr=0 pw=0 time=0 us)
1 FAST DUAL (cr=0 pr=0 pw=0 time=0 us cost=2 size=0 card=1)
SQL ID : db46bkvy509w4
INSERT INTO T13 SELECT ROWNUM, DBMS_RANDOM.STRING('A',25) FROM DUAL CONNECT
BY LEVEL <= 100
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 100 1.31 1.27 0 93 10634 10000
Fetch 0 0.00 0.00 0 0 0 0
total 101 1.31 1.27 0 93 10634 10000
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 56 (recursive depth: 2)
Rows Row Source Operation
0 LOAD TABLE CONVENTIONAL (cr=164 pr=0 pw=0 time=0 us)
100 COUNT (cr=0 pr=0 pw=0 time=0 us)
100 CONNECT BY WITHOUT FILTERING (cr=0 pr=0 pw=0 time=0 us)
1 FAST DUAL (cr=0 pr=0 pw=0 time=0 us cost=2 size=0 card=1)
SQL ID : 6542yyk084rpu
INSERT INTO T14 SELECT ROWNUM, DBMS_RANDOM.STRING('A',25) FROM DUAL CONNECT
BY LEVEL <= 100
call count cpu elapsed disk query current rows
Parse 2 0.00 0.00 0 0 0 0
Execute 10001 41.60 41.84 0 8961 52859 1000000
Fetch 0 0.00 0.00 0 0 0 0
total 10003 41.60 41.84 0 8961 52859 1000000
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 56 (recursive depth: 3)
Rows Row Source Operation
0 LOAD TABLE CONVENTIONAL (cr=2 pr=0 pw=0 time=0 us)
100 COUNT (cr=0 pr=0 pw=0 time=0 us)
100 CONNECT BY WITHOUT FILTERING (cr=0 pr=0 pw=0 time=0 us)
1 FAST DUAL (cr=0 pr=0 pw=0 time=0 us cost=2 size=0 card=1)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
log file switch completion 2 0.07 0.07
********************************************************************************In the above note that the "INSERT INTO T11" is reported as completing in 0 seconds, but it actually required roughly 42 seconds - and that would be visible by manually reviewing the resulting trace file. Also note that the log file switch completion wait was not reported for the "INSERT INTO T11" even though it impacted the execution time.
Back to the possibility of CPU starvation causing lost time. Another test with an otherwise idle server, followed by a second test with the same server having 240 other processes fighting for CPU resources (a simulated load).
ALTER SYSTEM FLUSH BUFFER_CACHE;
ALTER SESSION SET TRACEFILE_IDENTIFIER = 'MY_TEST_QUERY_NO_LOAD';
ALTER SESSION SET EVENTS '10046 TRACE NAME CONTEXT FOREVER, LEVEL 8';
SET TIMING ON
SELECT
COUNT(*)
FROM
T14;
SELECT
SYSDATE
FROM
DUAL;
SQL> SELECT
2 COUNT(*)
3 FROM
4 T14;
COUNT(*)
1000000
Elapsed: 00:00:01.37With no load the COUNT(*) completed in 1.37 seconds. The TKPROF output looks like this:
SQL ID : gy8nw9xzyg3bj
SELECT /* OPT_DYN_SAMP */ /*+ ALL_ROWS IGNORE_WHERE_CLAUSE
NO_PARALLEL(SAMPLESUB) opt_param('parallel_execution_enabled', 'false')
NO_PARALLEL_INDEX(SAMPLESUB) NO_SQL_TUNE */ NVL(SUM(C1),:"SYS_B_0"),
NVL(SUM(C2),:"SYS_B_1")
FROM
(SELECT /*+ NO_PARALLEL("T14") FULL("T14") NO_PARALLEL_INDEX("T14") */
:"SYS_B_2" AS C1, :"SYS_B_3" AS C2 FROM "T14" SAMPLE BLOCK (:"SYS_B_4" ,
:"SYS_B_5") SEED (:"SYS_B_6") "T14") SAMPLESUB
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.01 0.84 523 172 1 1
total 3 0.01 0.84 523 172 1 1
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer mode: ALL_ROWS
Parsing user id: 56 (recursive depth: 1)
Rows Row Source Operation
1 SORT AGGREGATE (cr=172 pr=523 pw=0 time=0 us)
8733 TABLE ACCESS SAMPLE T14 (cr=172 pr=523 pw=0 time=0 us cost=2 size=12 card=1)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 3 0.02 0.04
db file parallel read 1 0.31 0.31
db file scattered read 52 0.03 0.47
SQL ID : 96g93hntrzjtr
select /*+ rule */ bucket_cnt, row_cnt, cache_cnt, null_cnt, timestamp#,
sample_size, minimum, maximum, distcnt, lowval, hival, density, col#,
spare1, spare2, avgcln
from
hist_head$ where obj#=:1 and intcol#=:2
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.06 2 2 0 0
total 3 0.00 0.06 2 2 0 0
Misses in library cache during parse: 0
Optimizer mode: RULE
Parsing user id: SYS (recursive depth: 2)
Rows Row Source Operation
0 TABLE ACCESS BY INDEX ROWID HIST_HEAD$ (cr=2 pr=2 pw=0 time=0 us)
0 INDEX RANGE SCAN I_HH_OBJ#_INTCOL# (cr=2 pr=2 pw=0 time=0 us)(object id 413)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 2 0.02 0.04
SELECT
COUNT(*)
FROM
T14
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 1 1 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.03 0.43 6558 6983 0 1
total 4 0.03 0.44 6559 6984 0 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 56
Rows Row Source Operation
1 SORT AGGREGATE (cr=6983 pr=6558 pw=0 time=0 us)
1000000 TABLE ACCESS FULL T14 (cr=6983 pr=6558 pw=0 time=0 us cost=1916 size=0 card=976987)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 1 0.02 0.02
SQL*Net message to client 2 0.00 0.00
db file scattered read 111 0.02 0.38
SQL*Net message from client 2 0.00 0.00Note that TKPROF reported that it only required 0.44 seconds for the query to execute while the SQL*Plus timing indicate that it required 1.37 seconds for the SQL statement to execute. The SQL optimization (parse) with dynamic sampling query accounted for the remaining time, yet TKPROF provided no indication that this was the case.
Now the query with 240 other processes competing for CPU time:
ALTER SYSTEM FLUSH BUFFER_CACHE;
ALTER SESSION SET TRACEFILE_IDENTIFIER = 'MY_TEST_QUERY_WITH_LOAD';
SELECT COUNT(*) FROM T14;
SELECT
SYSDATE
FROM
DUAL;
SQL> SELECT COUNT(*) FROM T14;
COUNT(*)
1000000
Elapsed: 00:00:59.03The query this time required just over 59 seconds. The TKPROF output:
SQL ID : gy8nw9xzyg3bj
SELECT /* OPT_DYN_SAMP */ /*+ ALL_ROWS IGNORE_WHERE_CLAUSE
NO_PARALLEL(SAMPLESUB) opt_param('parallel_execution_enabled', 'false')
NO_PARALLEL_INDEX(SAMPLESUB) NO_SQL_TUNE */ NVL(SUM(C1),:"SYS_B_0"),
NVL(SUM(C2),:"SYS_B_1")
FROM
(SELECT /*+ NO_PARALLEL("T14") FULL("T14") NO_PARALLEL_INDEX("T14") */
:"SYS_B_2" AS C1, :"SYS_B_3" AS C2 FROM "T14" SAMPLE BLOCK (:"SYS_B_4" ,
:"SYS_B_5") SEED (:"SYS_B_6") "T14") SAMPLESUB
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 0.00 0.28 423 69 0 1
total 3 0.00 0.28 423 69 0 1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 56 (recursive depth: 1)
Rows Row Source Operation
1 SORT AGGREGATE (cr=69 pr=423 pw=0 time=0 us)
8733 TABLE ACCESS SAMPLE T14 (cr=69 pr=423 pw=0 time=0 us cost=2 size=12 card=1)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file scattered read 54 0.01 0.27
db file sequential read 2 0.00 0.00
SQL ID : 7h04kxpa13w1x
SELECT COUNT(*)
FROM
T14
call count cpu elapsed disk query current rows
Parse 1 0.00 0.03 1 1 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 2 0.06 58.71 6551 6983 0 1
total 4 0.06 58.74 6552 6984 0 1
Misses in library cache during parse: 1
Optimizer mode: ALL_ROWS
Parsing user id: 56
Rows Row Source Operation
1 SORT AGGREGATE (cr=6983 pr=6551 pw=0 time=0 us)
1000000 TABLE ACCESS FULL T14 (cr=6983 pr=6551 pw=0 time=0 us cost=1916 size=0 card=976987)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
db file sequential read 1 0.02 0.02
SQL*Net message to client 2 0.00 0.00
db file scattered read 110 1.54 58.59
SQL*Net message from client 1 0.00 0.00Note in the above that the max wait for the db file scattered read is 1.54 seconds due to the extra CPU competition - about 3 times longer than your max wait for a single block read. On your database platform with single block reads, it might be possible that the time in the CPU run queue is not always counted in the db file sequential read wait time or the CPU wait time - what if your operating system is slow at returning timing information to the database instance due to CPU saturation - this might explain the 74 (or 88) lost seconds.
Charles Hooper
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.
Edited by: Charles Hooper on Aug 28, 2009 10:26 AM
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