Vertical Scaling of Oracle 10g Performance on Red Hat

Transcription

1 Vertical Scaling of Oracle 10g Performance on Red Hat Enterprise Linux 5 on Intel Xeon-Based Servers Oracle 10g Red Hat Enterprise Linux 5 Intel Xeon-based servers 3 1. Introduction and executive summary 4 2. Performance testing methodology 5 3. Oracle oltp performance and scaling on red hat enterprise linux 5 / harpertown (Intel e5540) 6 4. Oracle OLTP Performance and Scaling on Red Hat Enterprise Linux 5 / Tigerton (Intel X7350) 7 5. Oracle OLTP Performance and Scaling on Red Hat Enterprise Linux 5 / Dunnington (Intel X7600) 8 6. Conclusions 8 7. References

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3 1. Introduction and Executive Summary Customers seriously considering migrating mission-critical applications from UNIX to Red Hat Enterprise Linux are demanding up-to-date vertical scaling data for Oracle performance. This is an update of an earlier study which demonstrated scaling up to eight cores. The goal of this study is to characterize the performance and vertical scaling of Oracle OLTP performance on Red Hat Enterprise Linux 5 running on Intel Xeon-based servers (up to 24 cores). The OLTP workload was used because it represents a very common type of database workload that exercises both the memory and I/O sub-systems. The performance metric is transactions per minute (TPM). Since this TPM performance metric is for a synthetic benchmark workload, the actual TPM for a real application will depend on the characteristics of the application. Figure 1 illustrates the excellent scaling achieved up to 24 cores. Figure Oracle OLTP performance scaling on Red Hat Enterprise Linux 5 / Intel Xeon Thousands of TPM Number of cores Harpertown Tigerton Dunnington 3

4 2. Performance Testing Methodology Database performance and scalability often depend on many factors. However, it is impractical to try and collect data for all values of all factors that can influence Oracle performance on Red Hat Enterprise Linux. In order to get some useful information out to our sales, support, and consultants in the field in a timely manner, some judgment must be exercised in selecting the subset of the data that can be collected with the time and resources available. Specifically selected were: 1. Workload types: Online Transaction Processing (OLTP) Decision Support System (DSS) The OLTP workload was used because it represents a very common type of database workload which exercises both memory and I/O sub-systems. DSS workloads are less common and require large storage sub-systems. Since access to such storage subsystems was limited, we limited this version of the study to OLTP workloads. 2. File systems: EXT3 GFS NFS RAW device pseudo-files The EXT3 file system was selected as the basis for most of the experiments. EXT3 is a journalled file system and is the default system on Red Hat Enterprise Linux. Using a file system and/or LVM volumes for the Oracle databases maps to a large percent of users of Oracle on Red Hat Enterprise Linux. 3. I/O modes: Synchronous I/O Asynchronous I/O (AIO) Direct I/O (DIO) AIO with DIO (AIO + DIO) Raw I/O In previous experiments, it was observed that AIO+DIO consistently performed better than synch I/O, asynch I/O (AIO) and direct I/O (DIO) for OLTP workloads. So, studying AIO+DIO would yield the upper bound OLTP performance and scaling. AIO+DIO is what we recommend to our customers for OLTP workloads. 4. X86_64 servers: Intel Xeon AMD Opteron Processors from Intel s Harpertown, Tigerton, and Dunnington families were used. The enterprise customers simulated in these experiments, used the above OLTP workload with an average database size between GB. 4

5 3. Oracle OLTP Performance and Scaling on Red Hat Enterprise Linux 5 / Harpertown (Intel E5440) 3.1 Configuration Processor Dual socket, quad-core (total of eight cores) Intel Xeon E5440 (Harpertown) 2.83 GHz, 8 GB RAM Storage EqualLogic PS3800XV iscsi array 4.8 TB (16 x 300 GB, 15 K RPM SAS drives) Operating system Red Hat Enterprise Linux 5.1 File system EXT3 Database Oracle 10g R2 3.2 Results (Figure 2) Oracle scaling on Red Hat Enterprise Linux 5 / Harpertown Thousands of TPM Number of cores 5

6 4. Oracle OLTP Performance and Scaling on Red Hat Enterprise Linux 5 / Tigerton (Intel X7350) 4.1 Configuration Processor Quad socket, quad-core (total of 16 cores) Intel Xeon X7350 (Tigerton) 2.93 GHz, 32 GB RAM Storage HP StorageWorks 4400 Enterprise Virtual Array (EVA) 5.6 TB (20 x 280 GB drives) Operating system Red Hat Enterprise Linux 5.3 File system EXT3 Database Oracle 10g R2 4.2 Results (Figure 3) Oracle scaling on Red Hat Enterprise Linux 5 / Tigerton Thousands of TPM Number of cores 6

7 5. Oracle OLTP Performance and Scaling on Red Hat Enterprise Linux 5 / Dunnington (Intel X7600) 5.1 Configuration Processor Storage Quad socket, hex-core (total of 24 cores) Intel Xeon E7350 (Tigerton) 2.93 GHz, 32 GB RAM HP StorageWorks 2000 Modular Smart Array (MSA) TB (12 x 146 GB drives) for data + 2 x 80 GB Fusion IO SSD for logs Operating system Red Hat Enterprise Linux 5.3 File system Database EXT3 Oracle 10g R2 5.2 Results (Figure 4) Oracle scaling on Red Hat Enterprise Linux 5 / Dunnington Thousands of TPM Number of cores 7

8 6. Conclusions Database OLTP workloads represent a large portion of enterprise database customers real environments today. Chip vendors are driving scalability and innovation through larger processor counts and cores/ chips. As this trend continues to increase from dual-to-quad, quad-to-hex core on x86_64 servers open source Red Hat Enterprise Linux will continue to optimize the operating system (OS) for database scalability. Enterprise applications like Oracle can benefit from incremental improvement in real customer environments as CPU-cores increase. While the hardware design ultimately determines the position of the scale curve, the operating system and its capabilities affect the slope of the curve. This study demonstrates that given adequate I/O bandwidth, Oracle database OLTP performance scales very well up to 24 cores with Red Hat Enterprise Linux 5 on Intel Xeon servers. In the future, we expect to demonstrate vertical scaling of database OLTP performance to servers with: even larger numbers of cores or hyper-threads newer chip technology, such as Intel Nehalem 7. References 1. Red Hat Reference Architecture: Tuning & Optimizing Red Hat Enterprise Linux for Oracle 9i and 10g Databases. Version 1.1, November redhat.com/rhel/resource_center/reference_architecture.html 2. Red Hat Reference Architecture: Performance & Scalability of Virtualized Oracle 10g Servers on Red Hat Enterprise Linux, Version 1.0, June redhat.com/rhel/resource_center/reference_architecture.html Red Hat Reference Architecture: Oracle g Server on Red Hat Enterprise Linux 5 Deployment Recommendations, Version 1.2, November redhat.com/rhel/resource_center/reference_architecture.html Red Hat Sales and Inquiries NORTH AMERICA REDHAT1 EUROPE, MIDDLE EAST AND AFRICA europe@redhat.com ASIA PACIFIC apac@redhat.com LATIN AMERICA info-latam@redhat.com Copyright 2010 Red Hat, Inc. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, JBoss, MetaMatrix, and RHCE are trademarks of Red Hat, Inc., registered in the U.S. and other countries. Linux is the registered trademark of Linus Torvalds in the U.S. and other countries. All other trademarks referenced herein are the property of their respective owners. # _0610