Read: Up to 520 MB/s
Write: Up to 480 MB/s
Sustained Write: Up to 420 MB/s
Random Write 4KB : 70,000 IOPS
The good thing there is that vendor put both maximal write ( most likely from state A ) and Sustained Write ( I guess from state C ).
However if you multiply 4KB*70000IOS, you will get 280000KB/s = 274MB/s, which is quite far from
declared 520MB/s.
What is the trick there: the trick is that maximal throughput in MB/sec you are getting when you use big block size, …
- Labnotes: Tools of the trade
- till's blog: Shopping for a CDN
- Mental Paging Space: Vmware - Leasons Learned - View ESX vs ESXi ISCSI Backup
- Brightbox Blog: The Brightbox Toolkit
- Transcending Frontiers: Do you want to work with us?
- Effectif Development: MongoDB Administration - Mathias Stearn
…of the second type you better use Transactions/Second/ User or Transactions/Second/ MB (which is similar measures as users in average have certain amount of data each). Doubling traffic for system of such type means handling twice amount of transactions on the twice amount of data.
Increasing amount of data is very serious implication for system performance. Some queries have relatively small impact (having LOG(N) scalability), others may have linear or even square complexity which …
- Ruby Inside: Best of RubyFlow: 12 Ruby Links From March 2010
- elc technologies - Blog : Ruby on Rails, iPhone, Flash, Agile, Interactive Design: Amazon's MySQL in the Cloud (RDS)
- How Software is Built: Interview with Daniel Jacobson - Digital Media - National Public Radio
- a work on process: Weekend Links
- igvita.com: Future of RDBMS is RAM Clouds & SSD
- Home - Leading Ruby on Rails Development and Consulting firm in India - Vinsol: 11 Things to Consider Before Deploying Your Rails Application
500 MB of storage
10,000 storage transactions
SQL Azure
1 Web Edition database (available for first 3 months only)
AppFabric
100,000 Access Control transactions
2 Service Bus connections
Data Transfers (per region)
500 MB in
500 MB out
Any monthly usage in excess of the above amounts will be charged at the standard rates. This introductory special will end on October 31, 2010 and all usage will then be charged at the standard rates.
This special …
- Vineet Gupta | Computer Programmer: Azure - Microsoft's Cloud Platform
- New Relic: Want real-time visibility into web apps deployed on Microsoft Windows Azure? We've got you covered.
- How Software is Built: Interview with Shaun Walker - DotNetNuke Co-Founder
By default, you'll get an alert when a request results in a memory increase of 50 MB. You can change this threshold in the plugin settings.
The summary memory data is automatically added to your daily Rails performance report.
Scout comes with a free 30 day trial, so you take it for a spin and see if it meets your needs. View our pricing information here .
Feedback
If you run into any issues we want to hear about it. You can email us at support@scoutapp.com or …
- Rails Envy » Home: Rails Envy Podcast - Episode #094: 10/02/2009
- Rails Inside: Scout Improves App Monitoring for Rails Developers
- Ruby on Rails Podcast: James Edward Gray II - Ruby on Rails Podcast
- igvita.com: Cluster Monitoring with Ganglia & Ruby
- Ruby Inside: New Relic RPM Officially Supports Rack and Sinatra - Finally!
- : Partner Thursday: Start monitoring your Servers in minutes with Scout
…Mark discusses how his team works with the development teams, their experience with cloud deployments, some of the challenges they have faced as well as a few lessons learned. We filmed this outside, so you will hear some wind noise and some chatter from the next picnic table over in the first five minutes, but the noise subsides after a few minutes. Thanks, Mark.
Play Video ( 184.6 MB, 15:16, MPEG-4)
- Signal vs. Noise: This week in Twitter
- Signal vs. Noise: Who would win in a fight between Erlang and Rails?
- Trevor Turk: Weekly Digest, 2-1-10
- Momoro Machine: Revisiting the hidden cost of features
- Riding Rails - home: Rails and the Enterprise
- Lee Munroe: Perfecting User Experience Design with A/B Testing
A new edition of Rails Magazine is now available, both in print and as a free pdf (36 pages, 2.8 MB) at http://railsmagazine.com/issues/6 .
In this number:
Beautifying Your Markup With Haml and Sass by Ethan Gunderson
Scaling Rails by Gonçalo Silva
Interview with Sarah Allen by Rupak Ganguly
Data Extraction with Hpricot by Jonas Alves
Deployment with Capistrano by Omar Meeky
Fake Data - The Secret of Great Testing by Robert Hall
Assuming 512 MB of RAM and you are only running Apache and MySQL on the box:
< IfModule mpm prefork module>
StartServers 2
MinSpareServers 2
MaxSpareServers 5
ServerLimit 20
MaxClients 20
MaxRequestsPerChild 10000
</ IfModule>
You can bump ServerLimit and MaxClients to 48 or so if you have 1GB of RAM. Note that this assumes you're using a fairly typical WordPress installation, and you've tried …
- How Software is Built: Interview with Amr Awadallah - Cloudera CTO
- Scout ~ The Blog: Is your Rails app under-provisioned?
- I can't code! Now what?: You got served! The Epic: Part 1.
- High Scalability: 100 Node Hazelcast cluster on Amazon EC2
- Coding Horror: Buy Bad Code Offsets Today!
- starjuice - Home: Saving Uploaded Images to the Database
…and RabbitMQ), both at startup (e.g. >120MB for ActiveMQ vs. <3 MB for ocamlmq) and as new queues are created or new topic subscriptions are added
bad performance with ActiveMQ's scalable (to thousands of queues) storage backends ( KahaDB, JDBC)
bad performance in RabbitMQ's topic message dispatch: RabbitMQ was doing a linear scan of the subscription table per dispatch
RabbitMQ did not guarantee that persistent messages had been saved to disk before sending …
- Litany Against Fear: Messaging with Ruby on Rails Notes
- 4 Lines of Code: Background Jobs in Ruby on Rails
- Alexey Kovyrin's Blog: ActiveMQ Tips: Flow Control and Stalled Producers Problem
- ronin coder: Open Source Bridge presentation
- Jake Scruggs: Rails Conf 2010 Day 2
…concurrency level in the range of a couple of tens, thanks to the fact that Rails needs about 25 MB per process. Multi-threaded Rails app servers can in theory spawn a couple of hundred of threads. After that it's also game over: an operating system thread needs a couple MB of stack space, so after a couple hundreds of threads you'll run out of virtual memory address on 32-bit systems even if you don't actually use that much memory.
There is another class of servers, …
- Phusion Corporate Blog: Making Ruby threadable: properly handling context switching in native extensions
- The Queue Blog: Link dump for June 10th
- RubyLearning Blog: Paul Barry Winner RPCFN #8
- Ruby Inside: JRuby 1.5.0 Released: The Best Alternative Ruby Implementation Gets Even Better
- Intridea - Company Blog: In Memory of Zigzag Chen
- Luigi Montanez: Grassroots Fundraising for Open Source Software
Yehuda Katz from the Rails core team and New Relic's own Justin George talk about what's new in Rails 3. They begin with an overview of current and planned performance improvements, then follow up with a discussion of how instrumentation-like that performed by New Relic's RPM Ruby agent-is better enabled in the Rails 3 framework. Lastly, they touch on what users can expect as they make the change from Rails 2 to Rails 3.
Play Video ( 78.8 MB, 10:22, MPEG-4)
- a work on process: Character encodings, Rails 3 and Ruby 1.9.2
- Engine Yard Ruby on Rails Blog: RailsConf, Here We Come!
- Ruby Inside: 8 Ruby and Rails Jobs for May 2010
- Envy Labs: Railsconf Rails 3 Tutorials
- Eddorre.com: Tutorial: Filtering Results with jQuery UI Slider and Rails 3 Beta 3
- Simone Carletti's Blog: Unobtrusive JavaScript in Rails 3