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Focal Point    Focal Point Forums  Hop To Forum Categories  WebFOCUS/FOCUS Forum on Focal Point     Master File performance

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Hi All

I have joined a set of master files using synonym editor.Those synonyms have close to 20 million records.The performance is too slow .Is there a way to achieve the performance of it.I have searched a lot for that but i cant get one document or any related articles. IF anyone knows the way/document/article/an idea to achieve the performance please pass it across.

I cant achive that by sqlpassthru'.We are looking for ways to achive the performance by master file joins.
 
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Danny-SRL
Virtuoso
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Naveen,

I suspect you mean that you have one (1) master file with many segments, each pointing to a relational table. And that the underlying tables have all in all 20M records. And that you would want to read 20M records in a few seconds.
Not very feasible. But:
You could build a sort of data warehouse.
You could change the structure to a hierarchy FOCUS file so that when using screening conditions you address only a small subset.
Or you could invest in a supercomputer.


Daniel
In Focus since 1982
wf 8.202M/Win10/IIS/SSA - WrapApp Front End for WF

 
Posts: 1980 | Location: Tel Aviv, Israel | Registered: March 23, 2006Report This Post
Dr. Nick
Gold member
posted Hide Post
Hi Naveen and Daniel,
A technique I used successfully when processing over a billion records was to simulate an index search by creating a higher level segment composed of part of the key. For example, if the search field is SSN, compose a higher level segment as the last two digits of SSN. Since the last four digits of SSN is sequentially assigned, in a large enough sample, data should be evenly distributed across all hundred values (00 - 99).

In another case, this technique was also used to partition data into ten partitions (0 - 9). The data maintenance and reporting processes would stage their activity to take advantage of this setup and would first setoff ten jobs then reassemble the extracted data into one file as the last step in the process.

Hope this helps.
Nick


WebFOCUS 7.7.03 & 8.0.7
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HTML, Excel, PDF, etc.
Also, using Maintain, etc.
 
Posts: 83 | Registered: February 26, 2009Report This Post
PBrightwell
Master
posted Hide Post
You might try building an Oracle view and building you synonym on that.


Pat
WF 7.6.8, AIX, AS400, NT
AS400 FOCUS, AIX FOCUS,
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Posts: 755 | Location: TX | Registered: September 25, 2007Report This Post
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