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  1. #1
    Join Date
    Dec 2006
    Posts
    598

    Lightbulb Burstable Ram?./

    What does the " Burstable RAM " mean?

    Does it mean you can use that amount?

    E.G


    256 Ram
    1024 Burstable Ram


    So it means a site could use all of the 1024MB of Ram the whole time? Or would the hosting company lower the allowance after a minute or two?

  2. #2
    Join Date
    Jun 2003
    Location
    UK
    Posts
    6,601
    The burst RAM is there for when you need that bit extra but as the node becomes busier you might find it harder to get the RAM so you can't use it all the time. If you do you might find the host asks you to upgrade your package
    Russ Foster - Industry Curmudgeon

  3. #3
    Join Date
    Nov 2005
    Location
    London UK
    Posts
    683
    Just remember burst ram is NOT guaranteed.

    Always get the ram you need and do not *depend* on burst ram, or you'll have a "bad" vps experience.
    UK SSD VPS without compromise - upto 250k IOPS !
    www.clustered.net

  4. #4
    Join Date
    Oct 2004
    Location
    Hellas
    Posts
    166
    WordPress Greece | Athanasiadis
    The Hellenic Community of WordPress

  5. #5
    Join Date
    Dec 2004
    Location
    Butler,TN
    Posts
    2,413
    Hi!
    I can't view the image..however..finding burst is normally easy.

    do:

    cat proc/user_beancounters

    It's the privvmpages settings..just /256 and that will be MB RAM burst.

    Bryon
    Bryon L Harvey
    Soil Relocation Engineer

  6. #6
    Join Date
    Oct 2004
    Location
    Hellas
    Posts
    166
    cat proc/user_beancounters
    is not working
    in privvmpages there are soft limit hard limit and pages
    Current Use Soft Limit Hard Limit Units Description
    privvmpages 57,504 262,144 278,528 4KB pages Memory allocation limit
    WordPress Greece | Athanasiadis
    The Hellenic Community of WordPress

  7. #7
    Join Date
    Dec 2004
    Location
    Butler,TN
    Posts
    2,413
    Hi!
    No problem, then.
    Soft=262,144= 1024MB
    Hard=278,528= 1088MB

    Bryon
    Bryon L Harvey
    Soil Relocation Engineer

  8. #8
    Join Date
    May 2003
    Location
    Florida
    Posts
    877
    Quote Originally Posted by dyrer
    cat proc/user_beancounters
    is not working
    in privvmpages there are soft limit hard limit and pages
    Current Use Soft Limit Hard Limit Units Description
    privvmpages 57,504 262,144 278,528 4KB pages Memory allocation limit
    try cat /proc/user_beancounters

  9. #9
    Join Date
    May 2003
    Location
    Florida
    Posts
    877
    Quote Originally Posted by dyrer
    cat proc/user_beancounters
    is not working
    in privvmpages there are soft limit hard limit and pages
    Current Use Soft Limit Hard Limit Units Description
    privvmpages 57,504 262,144 278,528 4KB pages Memory allocation limit
    try cat /proc/user_beancounters

  10. #10
    Join Date
    Oct 2004
    Location
    Hellas
    Posts
    166
    Version: 2.5
    uid resource held maxheld barrier limit failcnt
    1003: kmemsize 3351707 3356728 44223692 45508198 0
    lockedpages 0 0 1024 1024 0
    privvmpages 73205 73336 262144 278528 0
    shmpages 859 859 86016 86016 0
    dummy 0 0 0 0 0
    numproc 53 54 960 960 0
    physpages 54112 54191 0 2147483647 0
    vmguarpages 0 0 135168 2147483647 0
    oomguarpages 55050 55129 104448 2147483647 0
    numtcpsock 28 29 1440 1440 0
    numflock 6 8 752 824 0
    numpty 1 1 64 64 0
    numsiginfo 0 1 1024 1024 0
    tcpsndbuf 13368 15596 6881280 10813440 0
    tcprcvbuf 0 692 6881280 10813440 0
    othersockbuf 24072 29884 4504320 8388608 0
    dgramrcvbuf 0 0 1048576 1048576 0
    numothersock 19 23 1440 1440 0
    dcachesize 602700 611310 13639680 14499840 0
    numfile 1437 1438 37248 37248 0
    dummy 0 0 0 0 0
    dummy 0 0 0 0 0
    dummy 0 0 0 0 0
    numiptent 47 47 512 512 0

    According to this what my vps plan?
    WordPress Greece | Athanasiadis
    The Hellenic Community of WordPress

  11. #11
    Join Date
    Dec 2004
    Location
    Butler,TN
    Posts
    2,413
    Hi!
    Ohh..that's easy!

    135168=RAM=528MB
    262144 278528 =Burst RAM= 1024/1088MB
    44223692 45508198 = Kmem= ~42/43.9 MB

    As I said before..openvz recommends 15-17% of RAM to the kernel..so..that's not terrible..I have seen worse...but not good. It could cause problems down the road.

    Bryon
    Bryon L Harvey
    Soil Relocation Engineer

  12. #12
    Join Date
    Aug 2006
    Posts
    321
    Quote Originally Posted by reiteration
    Just remember burst ram is NOT guaranteed.

    Always get the ram you need and do not *depend* on burst ram, or you'll have a "bad" vps experience.

    How much ram do you need? Are there any guidlines to go by? Not for this person's specific needs but in general.


    Anyone can answer.

  13. #13
    Join Date
    Dec 2004
    Location
    Butler,TN
    Posts
    2,413
    Hi!
    No way to tell..no general guidelines. I can tell you if you plan on building something from source...and even installing something big (Java App server)
    what you will need to install is very different from what you will need to run it on a day to day basis. There is no way to know until you do it. Just an example...Cpanel used to run fine...espically for a person who just wanted to learn Cpanel..on a 128MB RAM VPS. Now...just to install it..you'll need twice that.

    Day to day..128MB is probably fine..but you can't have everything running at the same time.

    Bryon
    Bryon L Harvey
    Soil Relocation Engineer

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