Thursday, May 8, 2014

Top and load average in Linux


It always practice to see top command output in the linux servers to identify the resource utilization.

We try to check load average and assume the performence of the system.

The top output looks like below

load average: 2.39, 1.70, 1.81

The same can be checked from 
$ cat  /proc/loadavg
2.70 2.45 2.13 1/450 6959

What are these 3 number?  how to analyze them ? What should be normal numbers?

The load average is computed based on CPU utilization, and includes the number of processes using or waiting to use the CPU,

The load average can be interpreted on a basic level as being a CPU core at full utilization has a system load average of one.

For a quad-core (4 core) machine, a system load average of 4 would mean that the machine had adequate resources to handle the work it needed to do, 

On the same quad-core system, a load average of 8 would mean that if the server had eight cores instead of four, 

It would have been able to handle the work, but it is now overloaded. 

So when you check load average, You also need to check the no of CPU cores on the server.

Use the below command to check the number of CPU cores on the server.

$ grep 'process' /proc/cpuinfo | wc -l
8

So the thumb rule is always load average should be less than the number of CPU (Cores), For 4 core server, Load average should be less than 4 always.


In case the system is showing high load average, but the CPU system and user utilization is low, it is time to start looking at IO wait.

IO wait shows up in system load on Linux because one or more of the cores is busy waiting on something having to do with either disk, or network input or output to finish before it can continue. 

Will post more on the IO waits and finding the IO issues in the next post.

137 comments:

  1. Hi Sir,
    Thanks for the info on load average. We will wait for your next post on IO Wait.
    -Phani

    ReplyDelete
    Replies
    1. Thanks for one marvelous posting! I enjoyed reading it;Great post.The information was very useful.Keep the good work goin on!!
      Tally training in coimbatore | embedded systems training in coimbatore | Ansys training in coimbatore

      Delete
  2. No confusion here. You can use data installer to solve your problem.

    Java training in Chennai | Android training in chennai | Java training in Chennai

    ReplyDelete
  3. Welcome, You may hadoop training in chennai have done a surprising calling. I'll unequivocally oracle training in chennai bing them and my see inclination to my mates. I am sure are going oracle dba training in chennai to mishandled this site.

    ReplyDelete
  4. Welcome, You may have oracle training in chennai done an amazing calling. I'll unequivocally oracle dba training in chennai bing them and my see slant to my mates. I am certain hadoop training in chennai are going to misused this site.

    ReplyDelete

  5. Hi friends, This is Jamuna from Chennai. Your technical information is really useful for me. Keep update your blog.
    Regards..
    Oracle Training Institutes in Chennai

    ReplyDelete
  6. Hi, I have read your blog and I got a useful information from this blog. Thanks for sharing, keep posting..Salesforce is a cloud based CRM software. Today's most of the IT industry use this software for customer relationship management.
    Regards
    Salesforce Course in Chennai



    ReplyDelete
  7. I get a lot of great information from this blog. Thank you for your sharing this informative blog. Recently I did PHP course at a leading academy. If you are looking for best PHP Training Institute in Chennai visit FITA IT training academy which offer real timePHP Training Chennai.

    ReplyDelete
  8. Thanks for sharing this informative blog. SAP CRM is used for maintaining and managing relationship with customers by firm. If you want to know more about SAP, please visit FITA located at Chennai Velachery.
    Regards..
    SAP Training Institute in Chennai

    ReplyDelete
  9. Really awesome blog. Software testing is a method of executing the application or program with the intent of searching the software errors. Software Testing Training in Chennai offering this course at reasonable cost.

    ReplyDelete
  10. There are lots of information about latest technology and how to get trained in them, like Hadoop Training Chennai have spread around the web, but this is a unique one according to me. The strategy you have updated here will make me to get trained in future technologies(Hadoop Training in Chennai). By the way you are running a great blog. Thanks for sharing this. FITA chennai reviews

    ReplyDelete
  11. Thanks for the article. It has given me some idea of what I have been looking for and helped a lot, thank you. Come up with more such articles, wish to follow.
    Best PHP training in Chennai | Best PHP training in Chennai | Best PHP training in Chennai

    ReplyDelete
  12. Excellent Post, I welcome your interest about to post blogs. It will help many of them to update their skills in their interesting field.
    Regards,
    SAP training in chennai|sap training in Chennai|sap course in Chennai|SAP Training in Chennai

    ReplyDelete
  13. This information is impressive..I am inspired with your post writing style & how continuously you describe this topic. After reading your post,thanks for taking the time to discuss this, I feel happy about it and I love learning more about this topic iOS Training in chennai

    ReplyDelete
  14. Thanks for sharing such a great information..Its really nice and informative.
    java training in Chennai

    ReplyDelete
  15. The blog very wonderful and no confusions on studying times and thanks for sharing that the post.
    It is very helpful for me.
    html5 training in chennai

    ReplyDelete
  16. Thanks for sharing the valuable information with this site it will be useful for the people like beginners. Thank you and please keep updating like this information with this sites.

    digital marketing training Chennai

    ReplyDelete
  17. Perfect information to be shared through this post and the more new information to get after refer that post.I like that kind of information.

    iOS Training in Chennai

    ReplyDelete
  18. Wonderful blog. The information you have provided with us is really great. Thanks for sharing this useful information with us.
    Informatica Training in Chennai

    ReplyDelete
  19. thank you for sharing the information with this site this was really amazing i got some valuable information with this.

    SQL DBA Training in Chennai

    ReplyDelete
  20. Nice blog.It helps in knowing about the allocation of cpu resource utilisation.please update this kind of informationssis-training-in-chennai

    ReplyDelete
  21. Thanks for the useful information.Hadoop is an open-source software for storing data and running applications on a hardware. It provides storage for any kind of data, enormous processing power and the ability to handle tasks. Hadoop changes the enterprise store, process, and analyze data.

    Hadoop training in chennai

    ReplyDelete
  22. very informative blog. It clearly explains about the allocation of CPU resources. thanks for providing this information ios training in chennai

    ReplyDelete

  23. A very nice guide. I will definitely follow these tips. Thank you for sharing such detailed article. I am learning a lot from you. Helpful as always. Every post you write produce a massive value to your readers that is the only reason it is so popular and has great authority.

    Peridot Systems Chennai Reviews

    ReplyDelete
  24. All are saying the same thing repeatedly, but in your blog I had a chance to get some useful and unique information, I love your writing style very much, I would like to suggest your blog in my dude circle, so keep on updates.


    Java training in Adyar

    ReplyDelete
  25. Really impressive post with Telephony Applications, Wordpress Plugins, Android IOS, Website Design And Development at most cost effective and affordable rates Contact Us Content

    ReplyDelete
  26. I am very much satisfied by the nice info is visible in this log that to providing the great info in this blog. I have gathered info in the different areas in this blog and the nice approach is visible in this blog. This is really very happy for the nice technology in this blog and the amazing services in this blog. Thanks a lot for sharing the great info that to using the nice technology in this blog
    Oracle Apps Technical Online Training

    ReplyDelete
  27. This is the best application on the drop today. There access to enjoy great moments of relaxation: age of war 2|
    age of war 5
    Great! Thanks for sharing the information.Summon creatures to fight enemy units and demolish the opposing castle. Your castle is equipped with a crossbow, which you can use to shoot enemies age of war 6. Make sure you upgrade skills to increase your chances of winning battles.
    The goal of Age of War is to survive longer than the computer and to outlast him you’ll need to train the right troops while balancing your offence and defence in this high paced, quick thinking flash game age of war 4
    . Train troops of you own to combat the computers. As you kill off the computer troops, you will gain EXP and you will eventually advance to the next age.
    Choose a starter deck and prepare for an epic war!age of war 3

    Command your units in each battle to attack the enemy’s castle, while protecting your own base earn to die 2. Earn and upgrade cards to help you conquer the land.age of war

    happy wheels | tank trouble
    Thanks for the best blog.it was very useful for me.keep sharing such ideas in the future as well.this was actually what i was looking for,and i am glad to came here!
    cubefield It contains a plethora of tools and objects for level building such as harpoon guns,blocks and vans. Users can upload their maps to a public server where they are accessible

    ReplyDelete

  28. Inspiring writings and I greatly admired what you have to say , I hope you continue to provide new ideas for us all and greetings success always for you..Keep update more information..

    Digital marketing company in Chennai

    ReplyDelete
  29. Regards
    Sridevi Koduru (Senior Oracle Apps Trainer Oracleappstechnical.com)
    LinkedIn profile - https://in.linkedin.com/in/sridevi-koduru-9b876a8b
    Please Contact for One to One Online Training on Oracle Apps Technical, Financials, SCM, Oracle Manufacturing, OAF, ADF, SQL, PL/SQL, D2K at sridevikoduru@oracleappstechnical.com | +91 - 9581017828.

    ReplyDelete
  30. Professional Expert level Android Training in chennai, Android App Development
    Android Training | Android App Development | Training in chennai

    ReplyDelete
  31. I like to post here something useful for the freshers and the experienced professionals out well who are looking for an Android App which helps you in developing your own Android App Development and also it provides Android training and placement in Chennai

    ReplyDelete

  32. Thanks of sharing this post…Informatica is the fastest growing technology that helps to get your dream job in a best way, so if you wants to become a expertise in Informatica get some training on that Technology.
    Regards,

    ETL Training in Chennai | Informatica Training Institutes in Chennai

    ReplyDelete
  33. Pretty article! I found some useful information in your blog, it was awesome to read, thanks for sharing this great content to my vision, keep sharing.
    Regards,
    JAVA Training | Multimedia Training in Chennai

    ReplyDelete
  34. Nice post, Thanks for sharing this information with us.
    IT Job Training in Chennai

    ReplyDelete
  35. Thank you for sharing in this article, I can learn a lot and could also be a reference, I hope to read the next your article updates.
    oracle dba training institutes in chennai | oracle institute in chennai | Oracle Training in Chennai

    ReplyDelete
  36. You have done really great job. Your blog is very unique and informative. Thanks. Devops Online Training | Data Science Online Training

    ReplyDelete
  37. This blog post is a great information. I like that our share this topics.We upade our site has a lot of uses.Many useful interesting blogs found off here.
    Selenium Training in Chennai | Selenium Testing Training in Chennai

    ReplyDelete
  38. Hi, I am really happy to found such a helpful and fascinating post that is written in well manner. Thanks for sharing such an informative post. keep update your blog. R Programming Online Training

    ReplyDelete
  39. great information about java. keep sharing this type of useful article. Java Training Institute in Chennai | Java Training Institute in Velachery.

    ReplyDelete
  40. I have read your blog its very Interesting. Thanks for sharing. ERP Providers in Chennai | ERP Software Company Chennai. We provide best quality cost effective ERP software applications and end to end enterprise solutions to all the industry verticals with the affordable cost.

    ReplyDelete
  41. Really Nice Blog. Thank you for Sharing. We are the best erp software providers in chennai. For more details call +91 9677025199 or email us on info@bravetechnologies.in. ERP Software in Chennai | ERP Providers in Chennai

    ReplyDelete
  42. Excellent post. I have read your blog it's very interesting and informative. Keep sharing.
    erp in chennai

    ReplyDelete
  43. Hi,
    I found your blog has very interesting topics,thanks for sharing such an interesting information with us. Erp tree provides best oracle financials online coaching globally.people who interested in oracle go through our site and for more info call us .
    thank you,
    Oracle EBS training

    ReplyDelete
  44. I really appreciate information shared above. It’s of great help. If someone want to learn Online (Virtual) instructor lead live training in TECHNOLOGY , kindly contact us http://www.maxmunus.com/contact
    MaxMunus Offer World Class Virtual Instructor-led training on TECHNOLOGY. We have industry expert trainer. We provide Training Material and Software Support. MaxMunus has successfully conducted 100000+ pieces of training in India, USA, UK, Australia, Switzerland, Qatar, Saudi Arabia, Bangladesh, Bahrain and UAE etc.
    For Demo Contact us.
    Pratik Shekhar
    MaxMunus
    E-mail: pratik@maxmunus.com
    Ph:(0) +91 9066268701
    http://www.maxmunus.com/

    ReplyDelete
  45. hi sir this post is very useful to us thank u so much for sharing .for more information about Oracle fusion financials training

    ReplyDelete
  46. I really appreciate information shared above. It’s of great help. If someone want to learn Online (Virtual) instructor lead live training in Oracle DBA TECHNOLOGY , kindly contact us http://www.maxmunus.com/contact
    MaxMunus Offer World Class Virtual Instructor-led training on TECHNOLOGY. We have industry expert trainer. We provide Training Material and Software Support. MaxMunus has successfully conducted 100000+ pieces of training in India, USA, UK, Australia, Switzerland, Qatar, Saudi Arabia, Bangladesh, Bahrain and UAE etc.
    For Demo Contact us.
    Pratik Shekhar
    MaxMunus
    E-mail: pratik@maxmunus.com
    Ph:(0) +91 9066268701
    http://www.maxmunus.com/

    ReplyDelete
  47. Nice one, Thanks for your valuable information, it is very easy to learn and understand.
    Oracle DBA Training in chennai | Oracle DBA Training in velachery

    ReplyDelete
  48. Good and nice article, thanks for sharing your information... keep rocks...
    Android Training in chennai | Android Training institute in velachery

    ReplyDelete
  49. Good one, very informative.. thanks for sharing your views and ideas.. it is very useful to me.. thanks once again..

    Java Training in chennai

    Software Testing Training in chennai

    ReplyDelete
  50. Dealkare Movers packers bharuch, being one of the best & reliable packing and moving company, is engaged in providing best services to their customers. For more details visit to our website at www.dealkare.com.

    ReplyDelete
  51. If you are looking for manual testing company in delhi, then ITSWS technologies is best company which provides manual testing at cheap cost.

    ReplyDelete


  52. Thanks for sharing this valuable information to our vision. If anyone looking for best training institute for learning various courses like IOT Training then this is the right time.

    ReplyDelete
  53. Very interesting blog which helps me to get the in depth knowledge about the technology, Thanks for sharing such a nice blog..CCNA Training Institute in Chennai | CCNA Training Institute in Velachery.

    ReplyDelete
  54. Thanks for your informative blog on Linux. Your post helped me to understand the future and career prospects in Linux. Keep on updating your blog with such awesome blog. Software Testing Course in Chennai | Selenium Course in Chennai | ISTQB Course in Chennai

    ReplyDelete
  55. Really it was an awesome article...very interesting to read..You have provided an nice article....Thanks for sharing..
    Android Training in Chennai
    Ios Training in Chennai

    ReplyDelete
  56. You are using load average concepts...I really understand the concepts clearly..Thanks for updating linux operating system..
    Java Training Institute in Chennai | DotNet Training Institute in Chennai | Web Designing Training Institute in Chennai

    ReplyDelete
  57. Thanks for sharing this excellent blog with us.keep updating such a informative post.
    Android Project Center in Chennai | Android Project Center in Velachery

    ReplyDelete

  58. Interesting post! This is really helpful for me. I like it! Thanks for sharing!
    microsoft office online

    ReplyDelete
  59. Hi dear, I like your post so much, and it is very good. Hope that we can communicate with each other. I want to introduce an aso services, I try it and I feel it is so good to us beginners.

    ReplyDelete
  60. Interesting post! This is really helpful for me. I like it! Thanks for sharing!
    online marketing lüdenscheid

    ReplyDelete
  61. Very nice Blog..Thanks for sharing your amazing article... great
    word cookies answersaz
    archery games
    scratch games

    ReplyDelete
  62. a pride for me to be able to discuss on a quality website because I just learned to make an article on
    cara menggugurkan kandungan

    ReplyDelete
  63. Thank you for sharing such a nice and interesting blog with us. I have seen that all will say the same thing repeatedly. But in your blog, I had a chance to get some useful and unique information.

    Oracle Fusion HCM Online Training

    ReplyDelete
  64. Excellent blogs.We have to learning that the lot new information.I will be like this information.
    Best MatLab Training Institute in Chennai | MatLab Training Center in Velachery

    ReplyDelete
  65. Interesting post! This is really helpful for me. I like it! Thanks for sharing!
    PHP developers Chennai | PHP developers in Chennai

    ReplyDelete
  66. Needed to compose you a very little word to thank you yet again regarding the nice suggestions you’ve contributed here.

    java training in bangalore

    ReplyDelete
  67. Needed to compose you a very little word to thank you yet again regarding the nice suggestions you’ve contributed here.selenium training in bangalore

    ReplyDelete
  68. Thanks a lot very much for the high your blog post quality and results-oriented help. I won’t think twice to endorse to anybody who wants and needs support about this area.
    ME/M.Tech Project Center in Chennai | ME/M.Tech Project Center in Velachery

    ReplyDelete
  69. Informative blog and it was up to the point describing the information very effectively. Thanks to blog author for wonderful and informative post. Also great with all of the valuable information on mobile app and you are doing well.
    Mobile application developers in Chennai | Android application developers in Chennai | Android app developers Chennai

    ReplyDelete
  70. I have read your blog. Your information is really useful for beginner. Thanks for this useful infromation.
    Java Training in Chennai
    QTP Training in Chennai
    Python Training in Chennai

    ReplyDelete
  71. Your website content nice nice and interesting to observe.
    jobbörse Neunkirchen

    ReplyDelete
  72. Those guidelines additionally worked to become a good way to
    recognize that other people online have the identical fervor like mine
    to grasp great deal more around this condition.
    white label website builder

    ReplyDelete
  73. I believe there are many more pleasurable opportunities ahead for individuals that looked at your site.

    digital marketing training in chennai

    ReplyDelete
  74. I read this article. I think You put a lot of effort to create this article. I appreciate your work.
    Dissertation Writing Services

    ReplyDelete
  75. Impressive blog with lovely information. really very useful article for us thanks for sharing such a wonderful blog...
    Good Technical Boot Camp in Chennai | Best Summer Course in Porur

    ReplyDelete
  76. This what i'm looking for since days ago finally found one useful blog. Thanks for posting please do keep updating us...
    Best Online Software Training Institute | Unix Linux Training

    ReplyDelete
  77. Thank you for your information. I have got some important suggestions from it. Keep on sharing.
    Best Summer Courses for School Students in Chennai | Best Summer Courses for School Students in Velachery

    ReplyDelete
  78. Thanks for this grateful information..All this information is very important to all the users..Summer Courses in Chennai | Summer Courses in Pallavaram

    ReplyDelete
  79. Impressive blog with lovely information. Really very useful article for us thanks for sharing such a wonderful blog...
    JAVA Summer Course training Institute in Chennai|JAVA Summer Course training Institute in St. Thomas Mount

    ReplyDelete
  80. Pretty article! I found some useful information in your blog, it was awesome to read, thanks for updating..Summer Courses in Chennai | Summer Courses in Chrompet

    ReplyDelete
  81. Pretty article! I found some useful information in your blog, it was awesome to read, thanks for sharing this great content to my vision, keep sharing.
    Networking Summer Course training Institute in Chennai|Networking Summer Course training Institute in Ashok Nagar

    ReplyDelete
  82. My rather long internet look up has at the end of the day been compensated with pleasant insight to talk about with my family and friends. AWS Training in chennai

    ReplyDelete
  83. It's interesting that many of the bloggers to helped clarify a few things for me as well as giving. Most of ideas can be nice content.
    Best IT Training Institute in Chennai |Best IT Training Institute in Velachery

    ReplyDelete

  84. Hi there, You have done a great job. I'll certainly digg it and personally suggest to my friends. I'm confident they will be benefited from this website. aol email login

    ReplyDelete
  85. wow! great list, I also have a list for my blog. But your list was amazing, will use some of them. Thanks!
    Best Multimedia Vacation Course in Chennai | No.1 Summer Courses in Porur

    ReplyDelete
  86. me projects chennai is the team looks forward to welcoming you to our project development centre and help you to satisfied there me project centers chennai for developments and presenting project.You can get for affordable cost.

    ReplyDelete
  87. It is amazing and wonderful to visit your site.Thanks for sharing this information,this is useful to me...
    Comptia N+ Certification Courses in Chennai | No.1 Network+ Classes in Tambaram

    ReplyDelete