Click here to close now.



EsProc Enables Oracle JDBC to Speed Up Retrieve Process

EsProc's New Function

Recently, a performance issue occurs in a big detail report, where the original data volume in the two data tables as it involved has exceeded 3 million rows; the data volume that the report can retrieve after filtering remains at round 2 million rows. As we expected before, by using paged retrieve method, this report would present a much higher performance. However, for the fact that the user also needs to export the data from the report, the only option is that the data retrieve can be achieved from Oracle at a time. As the JDBC of Oracle runs quite slowly, it takes least 6-7 minutes to retrieve the data of more than 2 million rows from the Oracle. In general, such performance cannot meet the expectation of the customer.

Through great efforts we have made for a long period, this issue was finally solved by a way that the retrieve time can be cut down to dozens of seconds, thus to achieve the performance as the user requires. The solution mainly involves the use of parallel mechanism of esProc, and by multiple JDBCs, to achieve the synchronization of data retrieves.

Basic Information


HP ProLiant DL380 G7, CPU Intel Xeon E5620*2, RAM 20G, HDD Raid5 1T


Oracle11g64-bit, esProc, CentOS 6.0, JDK 1.6u43

Data Volumes of 2 Data Tables:

VM: 100K rows, 168 cols; and 65k rows after filtering

CT: 3 million rows, 16 cols; and 1.95 million rows after filtering

Basic Idea

By utilizing the parallel mechanism of esProc, the task of retrieving data from the two Oracle tables can be divided into a number of sub-tasks, which can be executed synchronously. And then the retrieved results are merged into one for each table. Finally, the two tables with merged results are joined to return the set of results for the report.


Main Program Script

Main Program Script

First, the database connection is created, in order to fetch the records from the two tables. Second, the data is segmented as per the number of sub-tasks (the screen shot shows the case of 16 sub-tasks), and the query range is assigned for a subroutine. Third, the subroutine is called by using callx to complete the query process. In the end, the main program is available to merge the results and produce a set of the end results which will then be returned to the report.

Subroutine Script

It is easy for the subroutine to complete the query process within a specified query range.



Performance Comparison

Pre-parallel (No Parallel)

Post-parallel (Parallel)

4 Parallels

8 Parallels

16 Parallels






As a result, here we see a leap from 400s to 40s in the data retrieve process.


1. What is described here covers only the part on how the data retrieve process can be expedited and how the esProc is used to generate the data source for the report in a fast way. However, the description on design and presentation of report is not mentioned here.

2. When the parallel retrieve process is used, it is required to create a connection with the database by each subtask, for example, connect(conn), which can be found in the subroutine script;

3. Parallel retrieve process is suitable for the case where the Oracle resources are spare (e.g., the number of connections is still far below the upper limit). In other words, this feature can enable the report to make full use of the database resources.

More Stories By Jessica Qiu

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

Latest Stories
In his General Session at DevOps Summit, Asaf Yigal, Co-Founder & VP of Product at, explored the value of Kibana 4 for log analysis and provided a hands-on tutorial on how to set up Kibana 4 and get the most out of Apache log files. He examined three use cases: IT operations, business intelligence, and security and compliance. Asaf Yigal is co-founder and VP of Product at log analytics software company In the past, he was co-founder of social-trading platform Currensee, which...
Container technology is shaping the future of DevOps and it’s also changing the way organizations think about application development. With the rise of mobile applications in the enterprise, businesses are abandoning year-long development cycles and embracing technologies that enable rapid development and continuous deployment of apps. In his session at DevOps Summit, Kurt Collins, Developer Evangelist at, examined how Docker has evolved into a highly effective tool for application del...
Discussions of cloud computing have evolved in recent years from a focus on specific types of cloud, to a world of hybrid cloud, and to a world dominated by the APIs that make today's multi-cloud environments and hybrid clouds possible. In this Power Panel at 17th Cloud Expo, moderated by Conference Chair Roger Strukhoff, panelists addressed the importance of customers being able to use the specific technologies they need, through environments and ecosystems that expose their APIs to make true ...
In recent years, at least 40% of companies using cloud applications have experienced data loss. One of the best prevention against cloud data loss is backing up your cloud data. In his General Session at 17th Cloud Expo, Sam McIntyre, Partner Enablement Specialist at eFolder, presented how organizations can use eFolder Cloudfinder to automate backups of cloud application data. He also demonstrated how easy it is to search and restore cloud application data using Cloudfinder.
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo 2016 in New York and Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud Expo and will feature technical sessions from a rock star conference faculty ...
Internet of @ThingsExpo, taking place June 7-9, 2016 at Javits Center, New York City and Nov 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 18th International @CloudExpo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo New York Call for Papers is now open.
The cloud. Like a comic book superhero, there seems to be no problem it can’t fix or cost it can’t slash. Yet making the transition is not always easy and production environments are still largely on premise. Taking some practical and sensible steps to reduce risk can also help provide a basis for a successful cloud transition. A plethora of surveys from the likes of IDG and Gartner show that more than 70 percent of enterprises have deployed at least one or more cloud application or workload. Y...
Cloud computing delivers on-demand resources that provide businesses with flexibility and cost-savings. The challenge in moving workloads to the cloud has been the cost and complexity of ensuring the initial and ongoing security and regulatory (PCI, HIPAA, FFIEC) compliance across private and public clouds. Manual security compliance is slow, prone to human error, and represents over 50% of the cost of managing cloud applications. Determining how to automate cloud security compliance is critical...
Growth hacking is common for startups to make unheard-of progress in building their business. Career Hacks can help Geek Girls and those who support them (yes, that's you too, Dad!) to excel in this typically male-dominated world. Get ready to learn the facts: Is there a bias against women in the tech / developer communities? Why are women 50% of the workforce, but hold only 24% of the STEM or IT positions? Some beginnings of what to do about it! In her Day 2 Keynote at 17th Cloud Expo, San...
As organizations shift towards IT-as-a-service models, the need for managing & protecting data residing across physical, virtual, and now cloud environments grows with it. CommVault can ensure protection & E-Discovery of your data - whether in a private cloud, a Service Provider delivered public cloud, or a hybrid cloud environment – across the heterogeneous enterprise.
In his keynote at @ThingsExpo, Chris Matthieu, Director of IoT Engineering at Citrix and co-founder and CTO of Octoblu, focused on building an IoT platform and company. He provided a behind-the-scenes look at Octoblu’s platform, business, and pivots along the way (including the Citrix acquisition of Octoblu).
Today air travel is a minefield of delays, hassles and customer disappointment. Airlines struggle to revitalize the experience. GE and M2Mi will demonstrate practical examples of how IoT solutions are helping airlines bring back personalization, reduce trip time and improve reliability. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Dr. Sarah Cooper, M2Mi’s VP Business Development and Engineering, explored the IoT cloud-based platform technologies driving t...
There are over 120 breakout sessions in all, with Keynotes, General Sessions, and Power Panels adding to three days of incredibly rich presentations and content. Join @ThingsExpo conference chair Roger Strukhoff (@IoT2040), June 7-9, 2016 in New York City, for three days of intense 'Internet of Things' discussion and focus, including Big Data's indespensable role in IoT, Smart Grids and Industrial Internet of Things, Wearables and Consumer IoT, as well as (new) IoT's use in Vertical Markets.
The Internet of Things (IoT) is growing rapidly by extending current technologies, products and networks. By 2020, Cisco estimates there will be 50 billion connected devices. Gartner has forecast revenues of over $300 billion, just to IoT suppliers. Now is the time to figure out how you’ll make money – not just create innovative products. With hundreds of new products and companies jumping into the IoT fray every month, there’s no shortage of innovation. Despite this, McKinsey/VisionMobile data...
We all know that data growth is exploding and storage budgets are shrinking. Instead of showing you charts on about how much data there is, in his General Session at 17th Cloud Expo, Scott Cleland, Senior Director of Product Marketing at HGST, showed how to capture all of your data in one place. After you have your data under control, you can then analyze it in one place, saving time and resources.