XQuery elapsed time varies significantly

Dear all,
I am a student and exploring xml databses for my final year project. I am executing xqueries on Berkley DB XML 2.4.13. The eapsed time on first execution is 3.343 seconds and upon immediate tries it is 0.844, 0.907, 0.86 seconds.
The XQuery is as follows
let $auction("Auciton.dbxml")/site
return count( for $i in $auction/closed_auctions/closed_auction where $i/price[., >= 40] return $i/price)
I have created Index on price node as node-element-equality-float. When I check QPlan i cannot see any index usage. same time difference is noticed when I execute queries from my java application. My machine is notebook running on intel core2duo 1.55Mgh with 1GB RAM.
Please share your valuable knowledge on this issue.
Thanks in advance,
Kotti

Kotti
The reason the query is slower the first time you execute it is because DB XML has a cache for the database pages. So the first time the query executes the database pages have to be gotten from disk, but the rest of the times the pages are likely already in memory.
Lauren Foutz

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Elapsed Time in my V$SQL

Hi,
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Table created.
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ORA-1555 ORA-3136 errors:: elapsed time vs Query Duration

Dear all,
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NAME                                 TYPE        VALUE
undo_management                      string      AUTO
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Thank you. Please let me know if it is enough or you need more information;
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ntDeviceId, d.created, d.lastModified AS devLastMod, d.customerI
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ily, d.softwareVer, d.serialNum, d.ip, d.mac, d.userKey3, d.user
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tTime <= :3 ) AND (endTime IS NULL OR endTime >= :4 )
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SELECT d.devId, d.vendor, d.model, d.productClass, d.oui, d.pare
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d, d.userKey1, d.userKey2, d.userKey4, d.userKey5, d.firmwareFam
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-> SQL reported below exceeded 1.0% of Total Buffer Gets
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Buffer Gets    Executions Gets per Exec %Total Time (s) Time (s) Hash Value
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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

How can I display the elapsed time of the course using Advanced Actions in Captivate?

I have a Captivate course which is approximately 35 minutes in length. On each slide I would like to display to the user, the current elapsed time.
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I talked about that Timer widget in that blog post and pointed to another one:
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Hi ,
How can I get the elapse time for execution of a Query for a session?
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Is there any possible way to capture this session info. for this particular execution of query along with it's execution elapse time?
Thanks in advance.

Hi
You can use the dbms_utility.get_time tool (gives binary_integer type value).
1/ Initialize you time and date of beginning :
v_beginTime := dbms_utility.get_time ;
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Then you can format you result to give correct print time.
Hope it will help you.
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How to use elapsed time function with state machine in Lab VIEW

Hello
I've been trying to use state machine with elapsed time function in order to sequentially start and stop my code. The arrangement is to start the code for 1 minute then stop for 5 minutes. I've attached the code, the problem is when I place the elapsed time function out of the while loop it doesn't work, on the other hand when I place it inside the loop it does work but it doesn't give the true signal to move to the next state.
Could you please have a look to my code and help me to solve this issue.
Regards
Rajab
Solved!
Go to Solution.
Attachments:
daq assistance thermocouple(sate machine raj).vi ‏436 KB

Rajab84 wrote:
Thanks apok for your help
even with pressing start it keeps running on wait case
could you please explain the code for me, the use of Boolean crossing, increment , and equal functions
Best Regards
Rajab
OK..I modded the example to stop after 2 cycles. Also recommend taking the free online LabVIEW tutorials.
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Attachments:
Untitled%202[1].vi ‏42 KB

Direct Path Read waits are not showing in Elapsed time

Hi,
I'm having a question regarding interpretation of a SQL trace file. I'm on Oracle 11.2.0.1 HP/UX 64 bit.
Following is only the overall result of the trace (it is quite big).
My question is about the Direct Path Read waits which are totallizing 268s of wait but are not showing in the fetch elapsed time (49.58s) and are not showing anywhere in the trace except in the overall result.
I do not understand why it is not part of the Elapsed time...
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Execute     62      0.01       0.01          0          0          0           0
Fetch      579      4.01      49.06       3027     153553          0        5516
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Event waited on                             Times   Max. Wait Total Waited
----------------------------------------   Waited ---------- ------------
SQL*Net message to client                   32754        0.00          0.03
SQL*Net message from client                 32753        2.33        232.01
Disk file operations I/O                      179        0.00          0.02
db file sequential read                      2979        0.54         45.72
SQL*Net more data to client                133563        0.04          5.30
direct path read                            34840        0.94        268.21
SQL*Net more data from client                1075        0.00          0.02
db file scattered read                          6        0.03          0.11
asynch descriptor resize                       52        0.00          0.00
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Parse       25      0.00       0.02          0          0          0           0
Execute     58      0.05       0.04          0          0          0           0
Fetch      126      0.00       0.04          4        161          0         123
total      209      0.05       0.11          4        161          0         123
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Elapsed times include waiting on following events:
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----------------------------------------   Waited ---------- ------------
Disk file operations I/O                        1        0.00          0.00
db file sequential read                         4        0.01          0.03
asynch descriptor resize                        1        0.00          0.00
   37 user SQL statements in session.
   57 internal SQL statements in session.
   94 SQL statements in session.
Trace file: oxd1ta00_ora_16542.trc
Trace file compatibility: 11.1.0.7
Sort options: default
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241517 lines in trace file.
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Christophe

Christophe Lize wrote:
Closing this thread even if it's not answered...Sorry, I don't have time to test this myself now, but you shouldn't mark this thread as answered if it is not, because other people might find it and think they find an answer if they have a similar question.
I suggest you try the following to narrow down things:
1. Open the RAW trace file and check the cursor numbers of the "direct path reads" - check if you can find any references for those cursor numbers manually. The cursor numbers are those numbers behind the WAIT #<xx>, and you can check if you find any other entry unequal to WAIT #<xx> with the same #<xx>, for example EXEC #<xx> or FETCH #<xx>
A short primer on how to interpret the raw trace file can also be found in MOS document 39817.1
2. Run the RAW trace file through alternative free trace file analyzers like SQLDeveloper (yes it can process raw trace files), OraSRP or Christian Antognini's TVD$XTAT. If you have My Oracle Support access you can also try Oracle's own extended Trace Analyzer (TRCA / TRCANLZR). See MOS Note 224270.1
Check if these tools tell you more about your specific wait event and oddities with the trace file in general.
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
Co-author of the "OakTable Expert Oracle Practices" book:
http://www.apress.com/book/view/1430226684
http://www.amazon.com/Expert-Oracle-Practices-Database-Administration/dp/1430226684

Same sqlID with different execution plan and Elapsed Time (s), Executions time

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221,808,602
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2tc2d3u52rppt
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1kn9bv63xvjtc
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Av Blks/Rd
Writes
Av Writes/s
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59
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4.86
185,084
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2,887
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112,070
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18
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223,581
14
11.50
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4
533
4.26
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198,936
12
2.77
17.88
11,179
1
732
2.13
INDUS_LOG_DATA01
45,838
3
4.81
14.36
348
0
1
0.00
INDUS_TMP_DATA01
44,020
3
4.41
16.55
244
0
1,587
4.79
SYSAUX
19,373
1
19.81
1.05
14,489
1
0
0.00
INDUS_LOG_INDX01
17,559
1
4.75
1.96
2,837
0
2
0.00
SYSTEM
7,881
0
12.15
1.04
1,361
0
109
7.71
INDUS_TMP_INDX01
1,873
0
11.48
13.62
231
0
0
0.00
INDUS_MST_INDX01
256
0
13.09
1.04
194
0
2
10.00
UNDOTBS1
70
0
1.86
1.00
60
0
0
0.00
STG_DATA01
63
0
1.27
1.00
60
0
0
0.00
USERS
63
0
0.32
1.00
60
0
0
0.00
INDUS_LOB_DATA01
62
0
0.32
1.00
60
0
0
0.00
TS_AUDIT
62
0
0.48
1.00
60
0
0
0.00
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Tablespace
Reads
Av Reads/s
Av Rd(ms)
Av Blks/Rd
Writes
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Buffer Waits
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INDUS_TRN_DATA01
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91
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The AWR reports for two days with same sqlID with different execution plan and Elapsed Time (s), Executions time please help me to find out what is reason for this change.
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You wrote with different execution plan, I think, you saw plans. It is very difficult, you get old plan.
I think Execution plans is not changed in different days, if you not added index or ...
What say ADDM report about this script?
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It is depend your database workload.
It think you must use SQL Access and SQl Tuning advisor for this script.
You can get solution for slow running problem.
Regards
Mahir M. Quluzade

How to get Sum for my Elapse Time string for my group

Hi,
How can I get the sum of an elapse time string in my group footer 2 and group footer 1 from the report screenshot attached.
I have a report that display TimeIn and TimeOut of an employee.
For the total time I have created a formula that will take my time in seconds and displaying it in hrs, minutes and seconds.
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The formula I have for the total time is as follow:
WhileReadingRecords;
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NumberVar Hours := Truncate (Remainder ( TotalSec , 86400) / 3600) ;
NumberVar Minutes := Truncate (Remainder ( TotalSec , 3600) / 60) ;
NumberVar Seconds := Remainder (TotalSec , 60) ;
Totext ( Hours , '00' ) + ':' +
Totext ( Minutes , '00' ) + ':' +
Totext ( Seconds , '00' )
This is a seperate question below but related as well to this report.
Another question I have is how can I round up for example 03:30:58 to 03:31:00
And also how can I round down for example 03:26:10 to 03:26:00
Any help would be appreciated.
Thank you,
Joe

Hi Jamie,
Well I ran into an issue with this. My Daily Total, there is no issue, it is displaying the proper time. But when I add a summary to my Group Footer 1, it doesn't add up properly.
If I select only 1, 2, or 3 days my Date Range Total is adding fine but when selecting 5 days for example, as you can see from the picture below, for an unknowned reason the total of hrs is wrong.
Do you know why this is happening.
Than you for your help.
Joe
Picture below, this is working fine?

Write elapsed time to a spreadsheet in hours:minutes:seconds format

Hi everyone,
I've been trying to write an elapsed time to a spreadsheet file in an hours:minutes:seconds format, but the time is displayed in a floating point value of seconds..
how can I write to a spreadsheet in an hours:minutes:seconds format.
Thank you,
James-

I often use a subVI that converts Seconds to Hours, Minutes and Seconds. Use the Quotient and Remainder function to divide your elapsed time by 3600, 60 and 1. You can then convert those values to a modified string and use the Write to Spreadsheet File.
As Dennis said, newer versions of LabVIEW's Write to Spreadsheet File.VI can handle arrays of Double, Integer or String automatically, and in older versions, the Write to Spreadsheet File.VI can be modified and copied to handle strings.
Hope this helps.
(Written in 8.5)
Message Edited by LabViewGuruWannabe on 01-18-2008 09:28 PM
Attachments:
TimeToSpreadsheet.vi ‏26 KB
SecondstoHMS.png ‏32 KB

How can I make a timer that will record elapsed time up to 15 hours with a PCI-6503E DAQ card?

I'm a beginner LabVIEW programmer, but need to take measurements of elapsed time from the start of data acquisition for up to 15 hours. I'm using a PCI-6503E card. Looking at examples on the web and LabVIEW, itself, I was only able to find a way to take time measurements with a DAQ card up to 167 s, unless two counters were tied together, but there are no instructions on how to do that. Could someone help me? Thanks.

I suggest you to look in the Resouce Library: inside it there is plenty of useful examples.
I found this VI with two cascaded timers in the Measurement hardware > Counter/Timer > Event/Time Measurement cathegory:
http://zone.ni.com/devzone/devzoneweb.nsf/opendoc?openagent&5293158F4EC950C4862568C1005F6CD9&cat=C7029C9ACBD3DF7386256786000F8EE6
Hope this helps.
Roberto
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

File adapter - Write - Elapsed Time based batching not working.

We are creating an asynchronous BPEL process that creates a file every 2 mins with the messages the BPEL process received in the last 2 minutes. We are using a file adapter with only "elapsed time" set to 2 minutes (Number of Messages and File size disabled) . If we deploy this into BPEL console and use bpel console's stress test feature, it doesnt create any file at all. If we use a file adapter based on Number of messages, it works fine. Can any one of you suggest what could be the problem ?

Unfortunately, this is documented bahaviour (solution/workaround anyone?!):
Elapsed Time Exceeds:
Specify a time which, when exceeded, causes a new outgoing file to be created.
Note:
The Elapsed Time Exceeds batching criteria is evaluated and a new outgoing file is created, only when an invocation happens.
For example, if you specify that elapsed time exceeds 15 seconds, then the first message that is received is not written out, even after 15 seconds, as batching conditions are not valid. If a second message is received, then batching conditions become valid for the first one, and an output file is created when the elapsed time exceeds 15 seconds.

How to get elapsed time of the query in form 6i

hi
I used to use " set timing on " in sql to get the elapsed time
set timing on
elapsed time :XX:XX:XX ,
but i dont know how to get it in fom
its really imporant to measure the time elapsed for me cuz i am student an need to get the time
thanx alot

regarding to point 1 : u know there are three modes for system ; query, enter_qeury,and normal. when the system is not noraml so it is either query or enter_query , and both are query processing ( as i think) so it the elapsed time . it also by using timer stpos when system finish query ( normal)
why you dont prefer timers ..... ( it important please to explain )
thank you very much Navnit Punj
Edited by: user8652693 on 22/07/2009 07:33 ص

XQuery elapsed time varies significantly

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