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Thread: High network buffer - latency spikes while gaming

  1. #1
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    High network buffer - latency spikes while gaming

    For the past 2 months I've been having these problems. How can I fix this? I contacted my ISP and they said they can't do anything. Advertised internet speed is 15/2. Isp is Optimum Online. Windows 7 64-bit.


    We estimate your uplink as having 1100 ms of buffering. This is quite high, and you may experience substantial disruption to your network performance when performing interactive tasks such as web-surfing while simultaneously conducting large uploads. With such a buffer, real-time applications such as games or audio chat can work quite poorly when conducting large uploads at the same time.
    We estimate your downlink as having 1800 ms of buffering. This is quite high, and you may experience substantial disruption to your network performance when performing interactive tasks such as web-surfing while simultaneously conducting large downloads. With such a buffer, real-time applications such as games or audio chat can work quite poorly when conducting large downloads at the same time.

    http://n2.netalyzr.icsi.berkeley.edu...a9ba-4019-a008
    http://n2.netalyzr.icsi.berkeley.edu...b991-457e-8e51
    http://n1.netalyzr.icsi.berkeley.edu...abd1-487e-9a59
    http://n2.netalyzr.icsi.berkeley.edu...a689-4815-b429
    http://n1.netalyzr.icsi.berkeley.edu...8b5e-44fa-9810

    SpeedGuide.net TCP Analyzer Results
    Tested on: 2013.03.08 16:32
    IP address: 24.189.xx.xxx
    Client OS/browser: Windows 7 (Firefox 19.0)

    TCP options string: 020405b40103030801010402
    MSS: 1460
    MTU: 1500
    TCP Window: 65536 (NOT multiple of MSS)
    RWIN Scaling: 8 bits (2^8=256)
    Unscaled RWIN : 256
    Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
    BDP limit (200ms): 2621kbps (328KBytes/s)
    BDP limit (500ms): 1049kbps (131KBytes/s)
    MTU Discovery: ON
    TTL: 114
    Timestamps: OFF
    SACKs: ON
    IP ToS: 00000000 (0)

  2. #2
    SG Enthusiast RaisinCain's Avatar
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    What kind of connection are you paying for?

  3. #3
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    Quote Originally Posted by RaisinCain View Post
    What kind of connection are you paying for?
    I'm not really sure what you're asking. Optimum Online basic? 15 mbps down and 2 mbps up is what's advertised.

  4. #4
    Administrator Philip's Avatar
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    This buffering estimation is probably not very accurate, as Windows 7 auto-tunes the "TCP Window" buffer on the fly, depending on line condition.

    What is your average latency/ping ?
    What problems are you esperiencing ?

  5. #5
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    Quote Originally Posted by Philip View Post
    This buffering estimation is probably not very accurate, as Windows 7 auto-tunes the "TCP Window" buffer on the fly, depending on line condition.

    What is your average latency/ping ?
    What problems are you esperiencing ?
    The problem I've having is with league of legends. Average latency is about 80ms in game but intermittently (about every 5 minutes when it's bad) I get horrible latency spikes and dc for about 5-10 seconds. I've gone through their support for about a month and they said it was because of this. After they said it was this, I've seen a ton of threads about high network buffers causing lag spikes in game. "League of Legends uses a lot of bandwidth, especially when compared to other video games and most other applications. So it is very susceptible to high Network Buffers, the only way to have them adjusted is to contact the ISP and hope they remove them or lower them greatly." I contacted my ISP and they said they can't/won't/don't do that. Everything works fine except for when I'm playing LOL, and I get their advertised speed. If you say the measurements are inaccurate, the LOL support could just be trying to find something to blame, although there is many threads about this. I'm a noob when it comes to networking, as you probably already realized.
    Last edited by braff24; 03-08-13 at 08:50 PM.

  6. #6
    Administrator Philip's Avatar
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    The network bufferning can be related, however, its accuracy with Windows 7 on your end is somewhat questionable.

    I'd try to do a traceroute to the game server exactly when you're experiencing the issue, it may indicate where (which hop) the lag spike is occuring.
    You may want to try the gaming tweaks, and TCP Auto-tuning here: http://www.speedguide.net/articles/w...08-tweaks-2574 (they can be set with the TCP Optimizer as well)

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