For adding about 70 shift registers to my VI , will it affect the performance of the project or it depends on my PC ??

I have 70 shift registers to accumulate date from 70 channels to plot it every channel individually , will these shift registers affect the performance of the project or it depends on my PC ??

Osama90 wrote:
I have 70 shift registers to accumulate date from 70 channels to plot it every channel individually , will these shift registers affect the performance of the project or it depends on my PC ??
It will certainly affect your performance and ability to handle/change your code. Change it to an array of plots, either as a 2D array (if using the same sampling rate), or an array of clusters with the channels (1D array?) as data. From a machine perspective 70 SRs should work, but not from a person perspective.
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

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Want to learn more about shift registers and formula nodes

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Attachments:
shift (LV7.1).vi ‏19 KB

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Hi
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hi,
check in a sql client the sql created by Bi and the query that you use directy from your physical layer...
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fact
quantity
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Do you use partioning functionality???
i hope i helped....
http://greekoraclebi.blogspot.com/
///////////////////////////////////////

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I intended to buy new mac pro, is it better to wait for new OS X moutain or can buy it now and update it later as it will not affect its performance???

khalid.mktaka76 wrote:
I intended to buy new mac pro, is it better to wait for new OS X moutain or can buy it now and update it later as it will not affect its performance???
If you can wait about a 3 months after 10.8 is released this summer and upon new hardware you should be in excellent shape to have not only a fastest latest machine, but a OS X version that all the bugs have been worked out. Plus the three free months of Apple hand holding while they figure out what they did wrong with the new OS version.
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Need help in improving the performance for the sql query

Thanks in advance for helping me.
I was trying to improve the performance of the below query. I tried the following methods used merge instead of update, used bulk collect / Forall update, used ordered hint, created a temp table and upadated the target table using the same. The methods which I used did not improve any performance. The data count which is updated in the target table is 2 million records and the target table has 15 million records.
Any suggestions or solutions for improving performance are appreciated
SQL query:
update targettable tt
set mnop = 'G',
where ( x,y,z ) in
select a.x, a.y,a.z
from table1 a
where (a.x, a.y,a.z) not in (
select b.x,b.y,b.z
from table2 b
where 'O' = b.defg
and mnop = 'P'
and hijkl = 'UVW';

987981 wrote:
I was trying to improve the performance of the below query. I tried the following methods used merge instead of update, used bulk collect / Forall update, used ordered hint, created a temp table and upadated the target table using the same. The methods which I used did not improve any performance. And that meant what? Surely if you spend all that time and effort to try various approaches, it should mean something? Failures are as important teachers as successes. You need to learn from failures too. :-)
The data count which is updated in the target table is 2 million records and the target table has 15 million records.Tables have rows btw, not records. Database people tend to get upset when rows are called records, as records exist in files and a database is not a mere collection of records and files.
The failure to find a single faster method with the approaches you tried, points to that you do not know what the actual performance problem is. And without knowing the problem, you still went ahead, guns blazing.
The very first step in dealing with any software engineering problem, is to identify the problem. Seeing the symptoms (slow performance) is still a long way from problem identification.
Part of identifying the performance problem, is understanding the workload. Just what does the code task the database to do?
From your comments, it needs to find 2 million rows from 15 million rows. Change these rows. And then write 2 million rows back to disk.
That is not a small workload. Simple example. Let's say that the 2 million row find is 1ms/row and the 2 million row write is also 1ms/row. This means a 66 minute workload. Due to the number of rows, an increase in time/row either way, will potentially have 2 million fold impact.
So where is the performance problem? Time spend finding the 2 million rows (where other tables need to be read, indexes used, etc)? Time spend writing the 2 million rows (where triggers and indexes need to be fired and maintained)? Both?

Tool used for knowing the performance

Which is tool used in oracle to know the performance of the query executed with time taken for execution???

hi
In SQL plus, please use the below command and then run the Query to know the time taken by the query.
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How can i use Bi-Technical Content is used for measuring the performance of

Hi
recenetly i implemented the BI7.0 for one client. I want to know how to use 'BI Administraction Cockpit,.
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Hi Ravi,
BI Admin Cockpit is enhancement of BW Statistics.
http://help.sap.com/saphelp_nw2004s/helpdata/en/44/08a75d19e32d2fe10000000a11466f/frameset.htm
Check this thread also:
BI Statistics comparision with the old
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Re: Query - Performance
http://help.sap.com/saphelp_nw2004s/helpdata/en/43/15c54048035a39e10000000a422035/frameset.htm
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For adding about 70 shift registers to my VI , will it affect the performance of the project or it depends on my PC ??

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