Re: [Vserver] major problem i have no clue where to look

From: Herbert Poetzl <>
Date: Wed 23 Nov 2005 - 21:07:49 GMT
Message-ID: <>

On Tue, Nov 22, 2005 at 07:32:55PM -0500, Chuck wrote:
> I am not even positive this is due/related to vserver.
> I have one guest which is a very busy radius server using a mysql
> database.
> The previous incarnation had no trouble at all on its own machine.
> Now, we are missing stop packets quite a bit which is causing radius
> accounting to go totally haywire.
> I have the added complication that this is a different radius software
> than we previously used, and it is not possible to revert back to try
> the old one. we previously used IC-Radius and are currently using
> Free-Radius.. both use mysql.
> I guess my questions would be process of elimination...
> 1. is there anything within the vserver system that could be
> considered a 'heartbeat' where a particular guest would be 'off' for a
> miniscule time where it could possibly miss an incoming packet?

only if the host would miss that packet too, as the
networking is entirely on the host (not the guest)

> 2. is there anything similar within iproute2 framework?
> 3. i remember reading somewhere and now cannot find it that there is a
> way to increase the priority of a particular guest. i was wondering if
> i did that for this one very slightly if it may ease its pain?

doesn't affect network parameters, only task switching
and task priorities ...

> 4. when inside a guest, does mysql behave slightly slower than it
> normally does? if so is there a cure? unfortunately this particular
> system requires lightning fast mysql responses.

slightly slower might be possible, especially if other
tasks are running, but I doubt that this has any influence
on the networking stacks, as they usually work much faster
than mysql would even get a request (not to talk of
answering it back)


> 5. anyone have such an experience and a cure/workaround?
> --
> Chuck
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Received on Wed Nov 23 21:08:07 2005

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