Expecting Sum-Of-Parts Performance From Shared Solid State Storage? I Didn’t Think So. Neither Should Exadata Customers. Here’s Why.

 

sum-of-parts

Last month I had the privilege of delivering the key note session to the quarterly gathering of Northern California Oracle User Group. My session was a set of vignettes in a theme regarding modern storage advancements. I was mistaken on how much time I had for the session so I skipped over a section about how we sometimes still expect systems performance to add up to a sum of its parts. This blog post (more...)

You Scratch Your Head And Ponder Why It Is You Go With Maximum Core Count Xeons. I Can’t Explain That, But This Might Help.

Folks that have read my blog for very long know that I routinely point out that Intel Xeon processors with fewer cores (albeit same TDP) get more throughput per core. Recently I had the opportunity to do some testing of a 2-socket host with 6-core Haswell EP Xeons (E5-2643v3) connected to networked all-flash storage. This post is about host capability so I won’t be elaborating on the storage. I’ll say that it was block storage, (more...)

Yes, You Must Use CALIBRATE_IO. No, You Mustn’t Use It To Test Storage Performance.

I occasionally get questions from customers and colleagues about performance expectations for the Oracle Database procedure called calibrate_io on XtremIO storage. This procedure must be executed in order to update the data dictionary. I assert, however, that it shouldn’t be used to measure platform suitability for Oracle Database physical I/O. The main reason I say this is because calibrate_io is a black box, as it were.

The procedure is, indeed, documented so it can’t (more...)

Is SLOB AWR Generation Really, Really, Really Slow on Oracle Database 11.2.0.4? Yes, Unless…

If you are testing SLOB against 11.2.0.4 and find that the AWR report generation phase of runit.sh is taking an inordinate amount of time (e.g., more than 10 seconds) then please be aware that, in the SLOB/awr subdirectory, there is a remedy script rightly called 11204-awr-stall-fix.sql.

Simply execute this script when connected to the instance with sysdba privilege and the problem will be solved. 

11.2.0.4-awr-stall-fix.sql

 


Filed under: oracle

Performance Data Visualization for SLOB. The SLOB Expert Community is Vibrant!

Thanks to Nikolay Savvinov (@oradiag) for his excellent post on how to wrap his scripts around the SLOB test driver (runit.sh) to capture and produce performance data visualization graphs.  I recommend a visit to his post here:

Performance Data Visualization with SLOB

 

As always, the link for SLOB is: Obtain the SLOB Kit and Helpful Information Here


Filed under: oracle

Little Things Doth Crabby Make – Part XVIV: Enterprise Manager 12c Cloud Control 12.1.0.5 Install Problem.

This is a short post to help out any possible “googlers” looking for an answer to why their 12.1.0.5 EM Cloud Control install is failing in the make phase with ins_calypso.mk.

Note, this EM install was taking place on an Oracle Linux 7.1 host.

The following snippet shows the text that was displayed in the dialogue box when the error was hit:


INFO: 11/12/15 12:10:37 PM PST: ----------------------------------
INFO: 11/12/15  (more...)

Oracle OpenWorld 2015. Additional Attractions to Consider: OakTable World and EMC Rocks Oracle OpenWorld.

This is a quick blog entry to to share some information with readers who are attending Oracle OpenWorld 2015.

EMC Rocks Oracle OpenWorld

EMC has a concurrent event at the Elan Event Center (directly across the street from Moscone West) during OpenWorld. This event is a great opportunity to come see the most unique and powerful solutions and products EMC has to offer to folks using Oracle Database. You can register for the event at (more...)

Copy Data Management for Oracle Database with EMC AppSync and XtremIO

This is a quick blog entry to invite readers to view this little demonstration video I created. The topic is Copy Data Management in an Oracle Database environment. We all know the pains involved with the number of database copies needed in today’s Oracle environment. Well, how about technology with these characteristics:

  1. 100% space efficient. There is no need for any full-copy “donor” in this solution. You can create 8192 XtremIO Virtual Copies of volumes (more...)

Focusing on Ext4 and XFS TRIM Operations – Part I.

I’ve been doing some testing that requires rather large file systems. I have an EMC XtremIO Dual X-Brick array from which I provision a 10 terabyte volume. Volumes in XtremIO are always thinly provisioned. The testing I’m doing required me to scrutinize default Linux mkfs(8) behavior for both Ext4 and XFS. This is part 1 in a short series and it is about Ext4.

Discard the Discard Option

The first thing I noticed in this (more...)

Announcing “SLOB Recipes”

I’ve started updating the SLOB Resources page with links to “recipes” for certain SLOB testing. The first installment is the recipe for loading 8TB scale SLOB 2.3 Multiple Schema Model with a 2-Socket Linux host attached to EMC XtremIO. Recipes will include (at a minimum) the relevant SLOB program output (e.g., setup.sh or runit.sh), init.ora and slob.conf.

Please keep an eye on the SLOB Resources page for updates…and (more...)

This Is Not Glossy Marketing But You Still Won’t Believe Your Eyes. EMC XtremIO 4.0 Snapshot Refresh For Agile Test / Dev Storage Provisioning in Oracle Database Environments.

This is just a quick blog post to direct readers to a YouTube video I recently created to help explain to someone how flexible EMC XtremIO Snapshots are. The power of this array capability is probably most appreciated in the realm of provisioning storage for Test and Development environments.

Although this is a silent motion picture I think it will speak volumes–or at least 1,000 words.

Please note: This is just a video demonstration to (more...)

Announcing SLOB 2.3. Tarry Not, Get It While It’s Hot!

This is just a quick post to announce SLOB 2.3. Please visit the SLOB Resources page to download the gzipped tar archive. The SLOB Resources page also has a link the SLOB 2.3 Documentation.

SLOB Resources Page: Click Here.

New in this release:

  1. The documentation is now also included in the tar archive under SLOB/doc in PDF form.
  2. SLOB 2.3 introduces the SLOB Single Schema feature. Please see the documentation.
  3. Because of (more...)

SLOB 2.3 User Guide

SLOB 2.3 is releasing within the next 48 hours. In case anyone wants to read about all the new features here is a link to the SLOB 2.3 User Guide:

SLOB 2.3 User Guide (pdf)

 


Filed under: oracle

SLOB 2.3 Is Getting Close!

SLOB 2.3 is soon to be released. This version has a lot of new, important features but also a significant amount of tuning in the data loading kit. Before sharing where the progress is on the front, I’ll quickly list some of the new important features that will be in SLOB 2.3:

  1. Single Schema Support. SLOB historically avoids application-level contention by having database sessions perform the SLOB workload against a private schema. The (more...)

Lab Report: Oracle Database on EMC XtremIO. A Compression Technology Case Study.

If you are interested in array-level data reduction services and how such technology mixes with Oracle Database application-level compression (such as Advanced Compression Option), I offer the link below to an EMC Lab Report on this very topic.

To read the entire Lab Report please click the following link:   Click Here.

The following is an excerpt from the Lab Report:

Executive Summary
EMC XtremIO storage array offers powerful data reduction features. In addition to (more...)

Whitepaper: Oracle Database 11g and 12c Consolidation and Workload Scalability with EMC XtremIO 3.0

This is a just a quick blog post to direct readers to the best Oracle-related paper detailing the value EMC XtremIO brings to Oracle Database use cases.  I’ve been looking forward to the availability of this paper for quite some time as I supported (minimally, really) the EMC Global Solutions Engineering group in this effort. They really did a great job with this testing! I highly recommend this paper for readers who are interested in:

Adding An EMC XtremIO Volume As An ASM Disk With Oracle Database 12c On Linux – It Does Not Get Any Easier Than This.

When Something Is Simple It Must Be Simple To Prove

Provisioning high-performance storage has always been a chore. Care and concern over spindle count, RAID type, RAID attributes, number of controller arms involved and a long list of other complexities have burdened storage administrators. Some of these troubles were mitigated by the advent of Automatic Storage Management–but not entirely.

Wouldn’t it be nice if the complexity of storage provisioning could be boiled down to but (more...)

Little Things Doth Crabby Make – Part XVIII. Automatic Storage Management Won’t Let Me Use My Disk For My Files! Yes, It Will!

It’s been a long time since my last installment in the Little Things Doth Crabby Make series and to be completely honest this particular topic isn’t really all that fit for a LTDCM installment because it covers something that is possible but less than expedient.  That said, there are new readers of this blog and maybe it’s time they google “Little Things Doth Crabby Make” to see where this series has been. This post might rustle (more...)

Scrutinizing Exadata X5 Datasheet IOPS Claims…and Correcting Mistakes

I want to make these two points right out of the gate:

  1. I do not question Oracle’s IOPS claims in Exadata datasheets
  2. Everyone makes mistakes

Everyone Makes Mistakes

Like me. On January 21, 2015, Oracle announced the X5 generation of Exadata. I spent some time studying the datasheets from this product family and also compared the information to prior generations of Exadata namely the X3 and X4. Yesterday I graphed some of the datasheet numbers (more...)

Recommended Reading: Oracle Database 12c NUMA-Related Topics

This is a short post to recommend some recent blog posts by Nikolay Manchev and Bertrand Drouvot on the topic of Oracle Database 12c NUMA awareness.

Nikolay provides a very helpful overview on Linux Control Groups and how they are leveraged by Oracle Database 12c. Bertrand Drouvot carried the topic a bit further by leveraging SLOB to assess the impact of NUMA remote memory on a cached Oracle Database workload. Yes, SLOB is very useful (more...)