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Displaying posts with tag: Intel (reset)
20-30% Performance Hit from the Spectre Bug Fix on Ubuntu

In this blog post, we’ll look at the performance hit from the Spectre bug fix on Ubuntu.

Recently we measured the performance penalty from the Meltdown fix on Ubuntu servers. It turned out to be negligible.

Today, Ubuntu made a Spectre bug fix on Ubuntu available, shipped in kernel 4.4.0-112. As with the Meltdown fix, we measured the effect of this update. Unfortunately, we observed a major performance penalty on MySQL workloads with this new kernel.

Our benchmark used the following:


  • CPU:
    • 2 x Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz (Codename Haswell)
    • /proc/cpuinfo has 48 …
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Meltdown and Spectre: CPU Security Vulnerabilities

In this blog post, we examine the recent revelations about CPU security vulnerabilities.

The beginning of the new year also brings to light fresh and new CPU security vulnerabilities. Today’s big offenders originate on the hardware side – more specifically, the CPU. The reported hardware kernel bugs allow for direct access to data held in the computer/server’s memory, which in turn might leak sensitive data. Some of the most popular CPUs affected by these bugs are Intel, AMD and ARM.

The most important thing to know is that this vulnerability is not exploitable remotely, and requires that someone execute the malicious code locally. However, take extra precaution when running in virtualized environments (see below for more information).

A full overview (including a technical, in-depth …

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Performance of Percona Server for MySQL on Intel Server Systems using HDD, SATA SSD, and NVMe SSD as Different Storage Mediums

We’re moving along on the first day at Percona Live Data Performance Conference 2016, and I was able to attend a lecture from Intel’s Ken LeTourneau on Performance of Percona Server for MySQL on Intel Server Systems using HDD, SATA SSD, and NVMe SSD as Different Storage Mediums. In this talk, Ken reviewed some benchmark testing he did using MySQL on various types of storage mediums. This talk looked at the performance of Percona Server for MySQL for Linux running on the same Intel system, but with three different storage configurations. We looked at and compared the performance of:

  1. a RAID of HDD
  2. a RAID of SATA SSD
  3. a RAID of NVMe SSD

In the talk,  Ken covered the hardware and system …

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Smallest MySQL Server in the World (under $60) which can even make you toast while fixing MySQL bug #2

In my last blog post, Internet of Things, Messaging and MySQL, I have showed how to start your own Internet of Things with Particle Photon board. That implementation is great, but requires constant internet (wi-fi) access as the Particle Photon board does not have any local storage. If you do not have a reliable network access (i.e. in some remote places) or need something really small to store your data you can now use Intel Edison. I’ve even install MySQL on Edison, which makes it the smallest (in size) MySQL server in the world! Other options include:

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Hyper-threading – how does it double CPU throughput?

The other day a customer asked me to do capacity planning for their web server farm. I was looking at the CPU graph for one of the web servers that had Hyper-threading switched ON and thought to myself: “This must be quite a misleading graph – it shows 30% CPU usage. It can’t really be that this server can handle 3 times more work?”

Or can it?

I decided to do what we usually do in such case – I decided to test it and find out the truth. Turns out – there’s more to it than meets the eye.

How Intel Hyper-Threading works

Before we get to my benchmark results, let’s talk a little bit about hyper-threading. According to Intel, Intel® Hyper-Threading Technology (Intel® HT Technology) uses processor resources more …

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On SSDs – Lifespans, Health Measurement and RAID

Solid State Drive (SSD) have made it big and have made their way not only in desktop computing but also in mission-critical servers. SSDs have proved to be a break-through in IO performance and leave HDD far far behind in terms of Random IO performance. Random IO is what most of the database administrators would be concerned about as that is 90% of the IO pattern visible on database servers like MySQL. I have found Intel 520-series and Intel 910-series to be quite popular and they do give very good numbers in terms of Random IOPS. However, its not just performance that you should be concerned about, failure predictions and health gauges are also very important, as loss of data is a big NO-NO. There is a great deal of misconception about the endurance level of SSD, as its mostly compared to rotating disks even when measuring endurance levels, however, there is a big difference in how both SSD and HDD work, and that has a direct impact on the endurance …

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Speaking in the US - San Francisco User Group - Community Summit - OSCON
On July 15th and 16th I will be in San Francisco for a few meetings, and it will be my pleasure to meet the San Francisco MySQL User Group, where I will talk about MySQL Sandbox.
From there, I will continue to Portland, to attend the Community Leadership Forum and, of course OSCON, where I will have three talks: two in the main event, and one at the Intel booth.

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CAOS Theory Podcast 2010.02.19

Topics for this podcast:

*Jacobsen v. Katzer and open source impact
*Intel, Nokia team up for MeeGo open source OS
*Open source continues in embedded space
*MongoDB and the advent of the NoSQL databases
*Copyrights, complexities, control and conflict

iTunes or direct download (21:48, 6.07 MB)

451 CAOS Links 2009.06.05

Spring forward. Freeloaders, leeches and hermits. Intel buys Wind River. And more.

Follow 451 CAOS Links live @caostheory

A Spring in its step
SpringSource boasted of rapid revenue growth while CEO Rod Johnson claimed that Red Hat’s Open Choice initiative is defensive response to SpringSource, a suggestion that was denied by Rich Sharples.

Freeloaders, leeches and hermits

I already provided my views earlier this week on Infoworld’s report about open source ‘leeches’ and corporate contributions. The debate continued as Dave Rosenberg …

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451 CAOS Links 2009.06.02

Cloudera lands funding. SourceForge acquires Ohloh. Novell reports Linux growth. And more.

Follow 451 CAOS Links live @caostheory

Cloudera shows signs of progress

GigaOM reported that Cloudera raised $6m Series B funding from Accel and Greylock and is now looking beyond web applications to wider enterprise adoption of Hadoop. Cloudera also announced its first certification program for Hadoop.

Open source goes mainstream in the UK
There have been signs of change recently with regards to open source adoption in the UK, which has traditionally lagged behind the rest of Europe and the US. CBR Magazine provided an analysis of …

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