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Ping times

 
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Kris



Joined: 12 May 2010
Posts: 216

PostPosted: Tue Jan 31, 2012 5:14 am    Post subject: Ping times Reply with quote

Hi all,

I've noticed this before, but never could figure it out:
When the computer which runs HostMonitor is just rebooted the average PING time to other computers is about 5ms.
In time this will increase up to about 50ms in about 4 weeks time.
I can see it happen in every history chart from any PING test.
Not shure if it will increase any further because the machine has never been un-rebooted (if that's even a word LOL) for more than 4 weeks.

Is this known behaviour? Could there be something filling up that needs to be cleared every once in a while?

Config server:
2x Dual Core Xeon @ 3.2Ghz
10GB mem
2x 1GB lan (teamed)
W2K8 R2
HostMonitor 8.86 / 460 tests

Other software running on it:
BackupExec 2010 R3
Symantec SEP Manager
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KS-Soft Europe



Joined: 16 May 2006
Posts: 2553

PostPosted: Tue Jan 31, 2012 8:31 am    Post subject: Ping times Reply with quote

We had similar problem. It was connected with Windows Server 2008R2 TCP/IP Window Auto-Tuning feature.
Could you try to disable it ?
You may use Command Prompt started with Administartor privileges and command like the following:
netsh interface tcp set global autotuninglevel=disabled
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Kris



Joined: 12 May 2010
Posts: 216

PostPosted: Wed Feb 01, 2012 1:38 am    Post subject: Reply with quote

Done.

I'll get back to you in a couple of weeks to let you know how it went

Thanks!
Kris
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Kris



Joined: 12 May 2010
Posts: 216

PostPosted: Tue Feb 21, 2012 4:01 am    Post subject: Reporting.... Reply with quote

Problem solved indeed

Thanks!
Kris
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xcentric



Joined: 23 Oct 2010
Posts: 170

PostPosted: Thu Feb 23, 2012 6:46 am    Post subject: Reply with quote

I had noticed the same symptoms. Ping times would ramp up for 3-4 weeks then suddenly drop off. I am happy to see this figured out.
Quote:
un-rebooted
Hilarious.
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Kris



Joined: 12 May 2010
Posts: 216

PostPosted: Tue Sep 25, 2012 7:16 am    Post subject: Reply with quote

I know this is an oldie, but today I noticed the aforementioned problem is back.

autotuninglevel is still disabled.

Any new knowledge on this one?
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Kris



Joined: 12 May 2010
Posts: 216

PostPosted: Mon Nov 12, 2012 2:24 am    Post subject: Reply with quote

Guess not then eh...
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KS-Soft



Joined: 03 Apr 2002
Posts: 10994
Location: USA

PostPosted: Mon Nov 12, 2012 4:58 pm    Post subject: Reply with quote

Sorry, we did not find other possible reasons for such problem.
May be some Symantec sideeffect?

If you cannot disable/uninstall Symantec, probably you can use RMA installed on different (clean) system to perform Ping tests? This is not very good idea for production monitoring because HostMonitor<->RMA traffic is more resource consuming than simple ping/ICMP packets but just for testing...

Regards
Alex
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Kris



Joined: 12 May 2010
Posts: 216

PostPosted: Thu Oct 24, 2013 4:05 am    Post subject: Reply with quote

-BUMP-

New job, new HM installation

And again I run into the same problem.
Ping response time for all ping tests increases as time goes by.
Already disabled TCP/IP autotuning feature.
I can't believe I'm the only one having this issue.

Config:
CPU: Intel i5 @ 3.2GHz
Mem: 8GB
OS: Win 7 Enterprise UK 64-bit
AV/Firewall: None whatsoever
HM version: 9.59
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KS-Soft



Joined: 03 Apr 2002
Posts: 10994
Location: USA

PostPosted: Fri Oct 25, 2013 5:08 am    Post subject: Reply with quote

Could you try the following:
Step 1: Open regedit
Step 2: Go to the HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces
Step 3: There will be many sub-keys with names like {068CA6B5-ACDD-4FC1-BCBB-66380B3EAF17}, go through each one of them and search for the one that has a key value called DhcpIPAddress that contains your current IP.
Step 4: Right click on the key and select New->DWORD Value, name it
TcpAckFrequency, then double click it and set it to 1
Step 5: Right click on the key and select New->DWORD Value, name it
TCPNoDelay, then double click it and set it to 1
Step 6: Restart your computer

Regards
Alex
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Kris



Joined: 12 May 2010
Posts: 216

PostPosted: Fri Oct 25, 2013 5:19 am    Post subject: Reply with quote

Done that.

I'll let you know how it goes
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oakyuz



Joined: 08 Feb 2007
Posts: 48

PostPosted: Wed Oct 30, 2013 12:45 am    Post subject: Reply with quote

Hi

We are using HM v9.58 on Windows 2008 R2.

After reading this topic, I checked at my ping times and realized that the same situation is valid for my ping tests. Then, I applied both solutions (auto tuning and registry keys) and the situation has been corrected.

A history chart sample showing my situation is below:

https://app.box.com/s/q0sc6lf3kchm136clq6r

In this graph, the points which the lines drop off show the times when host monitor restarted. I applied the solutions on 26th October and after this day, the ping times (and graph line) have become steady.

On the other hand, in my case, this situation happens in Host Monitor (Windows 2008 R2) and RMAs running on Windows 2008 R2, but not on RMAs on Windows 2003 SP2 and RMA for UNIX/Linux. Therefore, I thought that the situation may happen because Windows 2008 behaves differently.

Regards,
Oguzhan
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KS-Soft



Joined: 03 Apr 2002
Posts: 10994
Location: USA

PostPosted: Wed Oct 30, 2013 7:53 am    Post subject: Reply with quote

Thank you for information.

Quote:
In this graph, the points which the lines drop off show the times when host monitor restarted. I applied the solutions on 26th October and after this day, the ping times (and graph line) have become steady.

Or almost steady. Looks like reply time grows but just a little bit...

Regards
Alex
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