1. Joined : Sep 2016
    Posts : 6
    Windows 10
       04 Sep 2016 #1

    Issue with WinDBG being incredibly slow


    Hello! Not sure if this is the correct subforum, but since it's related to WinDBG I thought it was close enough.

    I'm doing some helping out over at reddit's techsupport channel and a fair bit of that involves checking dump files. I have used the old WinDBG (From 2012, installed on Win7, kept the same install into a Win10 upgrade a year ago), but recently it was giving me some issues so I decided to install a new version. Just for completeness' sake, the old issue was that after doing .symfix and .reload, it would hang for about 5 minutes and then hang for another 5 minutes when repeating !analyze -v. The downloading symbols part would take about 15-20 seconds and then it would just hang. Checked through third party software that monitors internet usage. The old version would only use local symbols when you first loaded in a new dump file while (I think) the new version loads symbols from the Microsoft server automatically.

    The new issue is that whenever I load in a dump file, it's slow beyond belief. It gets to this part and then it just slows to a crawl. It will output about one line every 5-10 minutes and it takes one hour before it's done and displays the information and I can enter any commands. If I try to exit out of WinDBG, the software will freeze, giving me a Windows prompt saying it's not responding. Use of the Break command, both through Ctrl+Break and Debug -> Break, has no effect.

    It could be an issue with acquiring the symbols from the server. I have added WinDBG to my approved list in the Windows Firewall to no effect. I do use a third party tool called Netlimiter since my network speed is terrible and it's useful for weeding out processes that uses excessive internet at the wrong time. It's reporting that WinDBG uses 3-5 kilobyte/s for 1-2 seconds every 10 seconds while this is happening. The old version would max my internet speed for about 15-20 seconds after doing .symfix and .reload.

    Symbol path: srv*https://msdl.microsoft.com/download/symbols

    EDIT: All my tests have been with minidumps (Small memory dump, 256kb).

    Thank you for any help!
    Last edited by Bjoolz; 04 Sep 2016 at 13:40. Reason: Bad title
      My System SpecsSystem Spec


  2. Joined : Jun 2015
    Posts : 10,906
    Windows 10 Pro / Windows 10 TP / Windows 8.1 Pro / Windows 7 Pro
       04 Sep 2016 #2

    Hi Bjoolz,

    First, you're symbol path is improper, because you don't tell where you want to download the symbols.
    Please check step 3 of WinDBG - Install Configure - Windows 10 Forums
      My System SpecsSystem Spec


  3. Joined : Sep 2016
    Posts : 6
    Windows 10
       04 Sep 2016 #3

    axe0 said: View Post
    Hi Bjoolz,

    First, you're symbol path is improper, because you don't tell where you want to download the symbols.
    Please check step 3 of WinDBG - Install Configure - Windows 10 Forums
    I initially had the symcache portion, but removed it when it became obvious how slow it was since I never had it on my old install. Sorry for not mentioning it.

    EDIT: I have now re-enabled it, copy pasting from the guide, and there is no change.
    Last edited by Bjoolz; 04 Sep 2016 at 15:13.
      My System SpecsSystem Spec


  4. Joined : Jun 2015
    Posts : 10,906
    Windows 10 Pro / Windows 10 TP / Windows 8.1 Pro / Windows 7 Pro
       04 Sep 2016 #4

    Of course there is no change, everything needs to be downloaded first what takes time.
      My System SpecsSystem Spec


  5. Joined : Sep 2016
    Posts : 6
    Windows 10
       04 Sep 2016 #5

    axe0 said: View Post
    Of course there is no change, everything needs to be downloaded first what takes time.
    But it's barely using any bandwidth. Over the last hour it has downloaded 7.3 megabytes. I also tried opening the same dump file again since it had just completed and it's just as slow as before. It has now been 10 minutes and it's not using any bandwidth this time either.
      My System SpecsSystem Spec


  6. Joined : Jun 2015
    Posts : 10,906
    Windows 10 Pro / Windows 10 TP / Windows 8.1 Pro / Windows 7 Pro
       05 Sep 2016 #6
      My System SpecsSystem Spec


  7. Joined : Sep 2016
    Posts : 6
    Windows 10
       05 Sep 2016 #7

    It worked. It's now basically instant. Guess I shouldn't have assumed that leaving it blank would stop it from trying to use the Microsoft server automatically. Downloading that much on a 4mbps line is not gonna be fun though.
      My System SpecsSystem Spec


  8. Joined : Sep 2016
    Posts : 6
    Windows 10
       08 Sep 2016 #8

    Just wanted to update the thread in case someone else stumbles in here with the same issue. Changing it to only use local symbols made it instant, but a hassle since it's very common to not have the correct symbols. .symfix and .reload gave the same 1 hour issue as loading a dump file and have it automatic. Now however it just suddenly works. I haven't done anything to make it work, it just started working.

    Only logical reason for why it didn't work must be that it was network related. No idea if it was local settings or a routing issue. If you experience the same issue, you might have to just wait for a week or try forcing different routing by using a VPN.
      My System SpecsSystem Spec


 


Similar Threads
Thread Forum
WinDBG - Install & Configure
How to Install and Configure WinDBG for BSOD Analysis WinDBG (Windows DeBuGger) is a Microsoft software tool that is needed to load and analyse the .dmp files that are created when a system BSOD's. The latest version of WinDBG allows debugging of...
Tutorials
Solved WinDbg error.
Hi, I'm quite active on the BSOD subforum of Sevenforums and recently I've been having a small issue with WinDbg and I tried to fix it but it didn't work. It has something to do with symbols and its path has somehow gotten a bit messy. 59847 ...
Software and Apps
BSOD where WinDbg suspects ntkrnlmp.exe
Hello. I have been having BSOD issues for the last several months on this laptop. They most commonly appear when I'm playing music and/or games, and it has gotten to the point where I am hesitant to even play online games anymore, as I often end...
BSOD Crashes and Debugging
Solved Need Help with setting up Windbg
I seem to be suffering from a severe lack of knowledge and experience in this area. I am trying to read dump file created by Windows 10 but keep seeing errors about ntoskrnl.exe and symbol errors. I have gone through the tutorial by Golden. I...
BSOD Crashes and Debugging
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 13:52.
Find Us
Twitter Facebook Google+



Windows 10 Forums