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Thread: CPU Load

  1. #1

    CPU Load

    can anyone tell me any factor that can rise up the cpu load??

    currently I hosted my websites on 2GB RAM vps with 1GB burst.
    I just host wordpress and simple website that use mysql..

    on the simple site, user will access about 30 rows data in mysql db.
    and about 35 people use it on a time
    can that be a factor??

    do you have any step that can I take to reduce cpu load??

    I am currently using vps from INIZ..

  2. #2
    Join Date
    Apr 2009
    Location
    New York City
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    5,169
    You can install this plugin for WordPress : http://wordpress.org/plugins/wp-super-cache/

    It will help the load on the server by a lot.
    There are many things that can make the load go up on your server. The more concurrent users you have the more load there is. The more query you have from the database the more intensive the site load will be.

    Sometimes a certain plugin can even cause the server to have a high load or even an outdated plugin / mod i believe can even do so..

    I am not a pro at wordpress hosting or vps management but these are just my 2cents. A lot of people install that plugin on their wordpress site because it really helps out.

  3. #3
    Join Date
    Oct 2012
    Location
    Europe and USA
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    991
    What is the number of CPU cores on your VPS and what load levels do you see when there is traffic on your site?

    Factors which affect the CPU load are:
    - Disk I/O usage and disk condition (for example, disks about to fail increase the CPU load to extremely high levels for just simple operations)
    - MySQL usage and lack of proper tuning (enabling table cache in my.cnf will decrease the load)
    - PHP usage, code optimization

    If you have setup a caching method for your sites, like WP Super Cache mentioned by LuxuryServers or a server-wide caching system (for example Varnish or an opcode cache, like APC, xCache and eAccelerator) the CPU load should drop.
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  4. #4
    I dont think that my wordpress installation give that problem..
    because the site just only few months old and got very little traffic..


    maybe my other site did that..on my simple site, I got about 1-2k visitor a day and they will execute mysql command that will initiate about 30rows data at a time on every their usage...

    I got report from nagios that my cpu load goes to 4, sometimes 5..not normal right??
    but it happen about 1 time in a day..

    maybe I dont optimize my code enough..
    but can it be a factor to my problem?
    and, will my host suspend me if this continue t happen?

  5. #5
    High disk IO affected by other VPS on same server could affect your server load.
    When your VPS experience high load, log on and run top command to check resource usage on the server whether it is CPU usage or high IO.
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  6. #6
    Quote Originally Posted by PremiumHost View Post
    High disk IO affected by other VPS on same server could affect your server load.
    When your VPS experience high load, log on and run top command to check resource usage on the server whether it is CPU usage or high IO.
    owh.. I see..
    so it is not confirmly my websites issues right??
    like you said, maybe problems from others vps on same server..
    I will take a look when it rise up.. thank you for your tips.

  7. #7
    Join Date
    Jan 2010
    Location
    Lithuania
    Posts
    1,115
    CPU usage can be caused by one of your services: apache, MySQL or any other. When load goes, login to server SSH and execute command:

    top

    then press:

    SHIFT + P

    You will see list of running applications who use most of your CPU.

  8. #8
    Quote Originally Posted by Time4VPS View Post
    CPU usage can be caused by one of your services: apache, MySQL or any other. When load goes, login to server SSH and execute command:

    top

    then press:

    SHIFT + P

    You will see list of running applications who use most of your CPU.
    wow.. thanks

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