Increasing Ping times - Reboot clears
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BradHouser
- Posts: 15
- Joined: Thu Aug 28, 2014 2:34 pm
Increasing Ping times - Reboot clears
We consistently see an increase in ping times, leading to false positive alerts. After rebooting the server, the ping times flatten out to 10 or so ms. This can be seen in the chart history. Look at the last 24 hours. The system was rebooted at 21:00. The ping times are way out of line with the manual ping times up to the reboot time. Notice the rapid rise from the 21st to the 24th also. Looks like the symptoms of a memory leak. Any suggestions?
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BradHouser
- Posts: 15
- Joined: Thu Aug 28, 2014 2:34 pm
It can be related to Windows Server 2008R2 TCP/IP Window Auto-Tuning feature.
Could you try to disable it - use command line (with Administartor privileges) netsh interface tcp set global autotuninglevel=disabled
not sure if system restart necessary...
If this will not help, could you setup WMI test with Full logging mode to check HostMonitor handles and threads?
Regards
Alex
Could you try to disable it - use command line (with Administartor privileges) netsh interface tcp set global autotuninglevel=disabled
not sure if system restart necessary...
If this will not help, could you setup WMI test with Full logging mode to check HostMonitor handles and threads?
Regards
Alex
Just a note:
I also noticed this behaviour, both at my previous job's network as my current HM installation.
See: http://www.ks-soft.net/cgi-bin/phpBB/vi ... php?t=6800
Tried every suggestion, but never got it solved.
Learned to live with it, but it would be nice if it would be resolved someday.
Kris
I also noticed this behaviour, both at my previous job's network as my current HM installation.
See: http://www.ks-soft.net/cgi-bin/phpBB/vi ... php?t=6800
Tried every suggestion, but never got it solved.
Learned to live with it, but it would be nice if it would be resolved someday.
Kris
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BradHouser
- Posts: 15
- Joined: Thu Aug 28, 2014 2:34 pm
Ping Times
Thanks Kris. I guess we aren't the only ones.
Alex: We will give disabling autotuning a try, but it sounds like there may be some commonality with Windows Server 20008 R2. I wonder if this is seen with Windows Server 2012?
Brad
Alex: We will give disabling autotuning a try, but it sounds like there may be some commonality with Windows Server 20008 R2. I wonder if this is seen with Windows Server 2012?
Brad
We don't see this behavior on our Windows 2008 R2 systems and I assume most of our customers do not experience this problem...Alex: We will give disabling autotuning a try, but it sounds like there may be some commonality with Windows Server 20008 R2. I wonder if this is seen with Windows Server 2012?
One customer had the same problem on Windows 2012 but he disabled AVG antivirus and updated HostMonitor (we increased time interval between ICMP packets) and looks like this solved the problem...
Version 9.90 already uses increased interval for ICMP packets so update will not help.
Antivirus? Not sure, I don't think antivirus checks ICMP traffic (just firewall module may block it) but if you can, try to disable it.
Regards
Alex