Click here to close now.



esProc Optimizes the Performance of Oracle Datasource Report

New reporting tool to optimize the reporting data source preparation performance in iReport and Oracle database

Description of the Issue

Some reports in a project suffered from very low speed. Despite various iReport and Oracle database optimizations, the situation is not yet satisfying. For example, there is a detail report, involving large data volume, many (dozens of) data tables, and frequent inter-table join (including self join). This report includes inter-cell computing expressions (ratios and sum). Here are some complicated data set SQL statements from this report:

(select * from (select syb.org_abbn as syb, max(xmb.org_abbn) as xmb, sub.org_subjection_id as sub_id, oi.org_abbn as org_abb, rm.rec_notice_org_id, rm.synergic_team as xz_team, xzdw.coding_name as xz_org, l.requisition_cd as req_cd, l.requisition_id as req_id, l.note as req_note, nvl(decode(l.ops_content6, 2000200012, 'Yes', 2000200011, 'No'), '') as sflj, --too long, most part from the select clause is omitted. fromlcr l left join lcrrm on rm.requisition_id = l.master_bill_id andrm.table_type = '0' andnvl(rm.bsflag, 0) != 1
left join cos sub on l.org_id = sub.org_id andnvl(sub.bsflag, 0) != 1 left join coioi on oi.org_id = sub.org_id andnvl(oi.bsflag, 0) != 1
--too long, most part from the join is omitted. wherel.table_type = '1' andl.requisition_state = '0101020304' andnvl(l.bsflag, 0) != 1 andto_char(l.back_date, 'yyyy-MM-dd') between '2012-01-01' and '2012-04-25' group by l.requisition_id, l.note, l.requisition_type, sub.org_subjection_id, syb.org_abbreviation, rm.rec_notice_org_id, oi.org_abbreviation, --too long, most of the group by fields are omitted ) a-- main query a LEFT JOIN crviewve-- viewve ON ve.requisition_id = a.req_id

If you check these SQL statements carefully, you'll find immediately that there are too many tables associated, including a lot of self-join. Meanwhile, there are many sub query embedded in it. To make this worse, it is also associated with a view, which is very complicated.

Currently the data presentation time for this report, when querying against 4 months data volume, is 6 minutes 42 seconds. This is far from what the end-user could accept.

As mentioned before, the report has been optimized several times. The data set SQL and report expressions have gone through careful tuning process. The above data set SQL is very complicated, with no room for further optimization. Meanwhile, as real time query, the use of pre-computed intermediate table for acceleration is also not a feasible approach.

After analyzing the report we find that it involves two stages: 1) the data loading stage (data set SQL execution stage), and 2) report computation and presentation stage. The first stage requires 5 minutes, and the second stage requires more than 1 minute. The reason for the slowing running of data set SQL is caused by the extremely low efficiency of the join in two sub queries (main querya and view ve).

Thus we find a new approach for optimization: we'll mainly optimize the data set loading by improving the efficiency of SQL join. At the same time, we'll optimize the computation and presentation part.

Resolution Process

The esProc approach for resolution of this issue is as following: 1. Split the data set SQL of the report As previously mentioned, the join between the two sub queries is causing the slow running of the SQL. We use esProc to execute the SQL for two sub queries, and then complete the association in esProc with "switch" ("switch" or "join" is used accordingly) statement. After test run we find significant improvement on efficiency. esProc

2. Eliminate inter-cell computing from the report The inter-cell computing (ratios and sum) part in the original report template is moved into esProc, thus the report generation could be speed up due to the removal of grid scanning.
3. Return the result set to the report all together After all data preparation is done through esProc, the result will be returned to reporting tool all together. Once data source is received, the presentation will be done directly, without any computation (such as inter-cell computing) that might affect efficiency.

The complete codes for esProc are as following:

Solution Result

Through the above process, total report presentation time is radically reduced from the original 6 minutes 42 seconds to 57seconds - less than 1 minute. The benefit of this optimization is remarkable. This is what the end-user is happy to see.


In the process of the problem resolution, we found that the main query a and view ve in the original SQL statement requires only 10 to 40 seconds when executed in Oracle separately. However, a join between a and view ve requires several minutes. This is because Oracle cannot always find a reasonable approach when automatic execution plan is used. If human interference is required, it will be very tedious and time consuming.
esProc could improve the performance, because we know that ve is actually a dimensional table of a. Thus we can use a particular method of "switch". This allows human definition of the execution plan for complicated query. In combination with Oracle's basic query statement, it will speed up the process significantly.
About esProc:

More Stories By Jessica Qiu

Jessica Qiu is the editor of Raqsoft. She provides press releases for data computation and data analytics.

Latest Stories
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies leverage disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 17th Cloud Expo, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advance...
Cloud and datacenter migration innovator AppZero has joined the Microsoft Enterprise Cloud Alliance Program. AppZero is a fast, flexible way to move Windows Server applications from any source machine – physical or virtual – to any destination server, in any cloud or datacenter, using its patented container technology. AppZero’s container is also called a Virtual Application Appliance (VAA). To facilitate Microsoft Azure onboarding, AppZero has two purpose-built offerings: AppZero SP for Azure,...
eCube Systems has released NXTmonitor, a full featured application orchestration solution. NXTmonitor, which inherited the code base of NXTminder, has been extended to support multi-discipline processes and will act as a DevOps utility in a heterogeneous enterprise environment. Previously, NXTminder was packaged with NXTera middleware to configure and manage Entera and NXTera RPC servers. “Since we are widening the focus of this solution to DevOps, we felt the need to change the name to NXTmon...
In today's digital world, change is the one constant. Disruptive innovations like cloud, mobility, social media, and the Internet of Things have reshaped the market and set new standards in customer expectations. To remain competitive, businesses must tap the potential of emerging technologies and markets through the rapid release of new products and services. However, the rigid and siloed structures of traditional IT platforms and processes are slowing them down – resulting in lengthy delivery ...
Contrary to mainstream media attention, the multiple possibilities of how consumer IoT will transform our everyday lives aren’t the only angle of this headline-gaining trend. There’s a huge opportunity for “industrial IoT” and “Smart Cities” to impact the world in the same capacity – especially during critical situations. For example, a community water dam that needs to release water can leverage embedded critical communications logic to alert the appropriate individuals, on the right device, as...
In his session at @ThingsExpo, Lee Williams, a producer of the first smartphones and tablets, will talk about how he is now applying his experience in mobile technology to the design and development of the next generation of Environmental and Sustainability Services at ETwater. He will explain how M2M controllers work through wirelessly connected remote controls; and specifically delve into a retrofit option that reverse-engineers control codes of existing conventional controller systems so the...
This Enterprise Strategy Group lab validation report of the NEC Express5800/R320 server with Intel® Xeon® processor presents the benefits of 99.999% uptime NEC fault-tolerant servers that lower overall virtualized server total cost of ownership. This report also includes survey data on the significant costs associated with system outages impacting enterprise and web applications. Click Here to Download Report Now!
U.S. companies are desperately trying to recruit and hire skilled software engineers and developers, but there is simply not enough quality talent to go around. Tiempo Development is a nearshore software development company. Our headquarters are in AZ, but we are a pioneer and leader in outsourcing to Mexico, based on our three software development centers there. We have a proven process and we are experts at providing our customers with powerful solutions. We transform ideas into reality.
Skeuomorphism usually means retaining existing design cues in something new that doesn’t actually need them. However, the concept of skeuomorphism can be thought of as relating more broadly to applying existing patterns to new technologies that, in fact, cry out for new approaches. In his session at DevOps Summit, Gordon Haff, Senior Cloud Strategy Marketing and Evangelism Manager at Red Hat, discussed why containers should be paired with new architectural practices such as microservices rathe...
SYS-CON Events announced today that IceWarp will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. IceWarp, the leader of cloud and on-premise messaging, delivers secured email, chat, documents, conferencing and collaboration to today's mobile workforce, all in one unified interface
Whether you like it or not, DevOps is on track for a remarkable alliance with security. The SEC didn’t approve the merger. And your boss hasn’t heard anything about it. Yet, this unruly triumvirate will soon dominate and deliver DevSecOps faster, cheaper, better, and on an unprecedented scale. In his session at DevOps Summit, Frank Bunger, VP of Customer Success at ScriptRock, will discuss how this cathartic moment will propel the DevOps movement from such stuff as dreams are made on to a prac...
It’s been proven time and time again that in tech, diversity drives greater innovation, better team productivity and greater profits and market share. So what can we do in our DevOps teams to embrace diversity and help transform the culture of development and operations into a true “DevOps” team? In her session at DevOps Summit, Stefana Muller, Director, Product Management – Continuous Delivery at CA Technologies, answered that question citing examples, showing how to create opportunities for ...
WebRTC has had a real tough three or four years, and so have those working with it. Only a few short years ago, the development world were excited about WebRTC and proclaiming how awesome it was. You might have played with the technology a couple of years ago, only to find the extra infrastructure requirements were painful to implement and poorly documented. This probably left a bitter taste in your mouth, especially when things went wrong.
SYS-CON Events announced today that DataClear Inc. will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. The DataClear ‘BlackBox’ is the only solution that moves your PC, browsing and data out of the United States and away from prying (and spying) eyes. Its solution automatically builds you a clean, on-demand, virus free, new virtual cloud based PC outside of the United States, and wipes it clean...
Too often with compelling new technologies market participants become overly enamored with that attractiveness of the technology and neglect underlying business drivers. This tendency, what some call the “newest shiny object syndrome,” is understandable given that virtually all of us are heavily engaged in technology. But it is also mistaken. Without concrete business cases driving its deployment, IoT, like many other technologies before it, will fade into obscurity.