Welcome!

Article

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.

Conclusion

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: http://www.raqsoft.com/product-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 ReadyTalk, a leading provider of online conferencing and webinar services, has been named Vendor Presentation Sponsor at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. ReadyTalk delivers audio and web conferencing services that inspire collaboration and enable the Future of Work for today’s increasingly digital and mobile workforce. By combining intuitive, innovative tec...
There is growing need for data-driven applications and the need for digital platforms to build these apps. In his session at 19th Cloud Expo, Muddu Sudhakar, VP and GM of Security & IoT at Splunk, will cover different PaaS solutions and Big Data platforms that are available to build applications. In addition, AI and machine learning are creating new requirements that developers need in the building of next-gen apps. The next-generation digital platforms have some of the past platform needs a...
Almost two-thirds of companies either have or soon will have IoT as the backbone of their business in 2016. However, IoT is far more complex than most firms expected. How can you not get trapped in the pitfalls? In his session at @ThingsExpo, Tony Shan, a renowned visionary and thought leader, will introduce a holistic method of IoTification, which is the process of IoTifying the existing technology and business models to adopt and leverage IoT. He will drill down to the components in this fra...
SYS-CON Events announced today that Pulzze Systems will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Pulzze Systems, Inc. provides infrastructure products for the Internet of Things to enable any connected device and system to carry out matched operations without programming. For more information, visit http://www.pulzzesystems.com.
I'm a lonely sensor. I spend all day telling the world how I'm feeling, but none of the other sensors seem to care. I want to be connected. I want to build relationships with other sensors to be more useful for my human. I want my human to understand that when my friends next door are too hot for a while, I'll soon be flaming. And when all my friends go outside without me, I may be left behind. Don't just log my data; use the relationship graph. In his session at @ThingsExpo, Ryan Boyd, Engi...
The Transparent Cloud-computing Consortium (abbreviation: T-Cloud Consortium) will conduct research activities into changes in the computing model as a result of collaboration between "device" and "cloud" and the creation of new value and markets through organic data processing High speed and high quality networks, and dramatic improvements in computer processing capabilities, have greatly changed the nature of applications and made the storing and processing of data on the network commonplace.
In his general session at 18th Cloud Expo, Lee Atchison, Principal Cloud Architect and Advocate at New Relic, discussed cloud as a ‘better data center’ and how it adds new capacity (faster) and improves application availability (redundancy). The cloud is a ‘Dynamic Tool for Dynamic Apps’ and resource allocation is an integral part of your application architecture, so use only the resources you need and allocate /de-allocate resources on the fly.
Using new techniques of information modeling, indexing, and processing, new cloud-based systems can support cloud-based workloads previously not possible for high-throughput insurance, banking, and case-based applications. In his session at 18th Cloud Expo, John Newton, CTO, Founder and Chairman of Alfresco, described how to scale cloud-based content management repositories to store, manage, and retrieve billions of documents and related information with fast and linear scalability. He addres...
From wearable activity trackers to fantasy e-sports, data and technology are transforming the way athletes train for the game and fans engage with their teams. In his session at @ThingsExpo, will present key data findings from leading sports organizations San Francisco 49ers, Orlando Magic NBA team. By utilizing data analytics these sports orgs have recognized new revenue streams, doubled its fan base and streamlined costs at its stadiums. John Paul is the CEO and Founder of VenueNext. Prior ...
SYS-CON Events announced today that Numerex Corp, a leading provider of managed enterprise solutions enabling the Internet of Things (IoT), will exhibit at the 19th International Cloud Expo | @ThingsExpo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Numerex Corp. (NASDAQ:NMRX) is a leading provider of managed enterprise solutions enabling the Internet of Things (IoT). The Company's solutions produce new revenue streams or create operating...
WebRTC adoption has generated a wave of creative uses of communications and collaboration through websites, sales apps, customer care and business applications. As WebRTC has become more mainstream it has evolved to use cases beyond the original peer-to-peer case, which has led to a repeating requirement for interoperability with existing infrastructures. In his session at @ThingsExpo, Graham Holt, Executive Vice President of Daitan Group, will cover implementation examples that have enabled ea...
Kubernetes is a new and revolutionary open-sourced system for managing containers across multiple hosts in a cluster. Ansible is a simple IT automation tool for just about any requirement for reproducible environments. In his session at @DevOpsSummit at 18th Cloud Expo, Patrick Galbraith, a principal engineer at HPE, discussed how to build a fully functional Kubernetes cluster on a number of virtual machines or bare-metal hosts. Also included will be a brief demonstration of running a Galera M...
IoT offers a value of almost $4 trillion to the manufacturing industry through platforms that can improve margins, optimize operations & drive high performance work teams. By using IoT technologies as a foundation, manufacturing customers are integrating worker safety with manufacturing systems, driving deep collaboration and utilizing analytics to exponentially increased per-unit margins. However, as Benoit Lheureux, the VP for Research at Gartner points out, “IoT project implementers often ...
SYS-CON Events announced today that Tintri Inc., a leading producer of VM-aware storage (VAS) for virtualization and cloud environments, will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Tintri VM-aware storage is the simplest for virtualized applications and cloud. Organizations including GE, Toyota, United Healthcare, NASA and 6 of the Fortune 15 have said “No to LUNs.” With Tintri they mana...
The Jevons Paradox suggests that when technological advances increase efficiency of a resource, it results in an overall increase in consumption. Writing on the increased use of coal as a result of technological improvements, 19th-century economist William Stanley Jevons found that these improvements led to the development of new ways to utilize coal. In his session at 19th Cloud Expo, Mark Thiele, Chief Strategy Officer for Apcera, will compare the Jevons Paradox to modern-day enterprise IT, e...