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I just noticed something... When the number of incomming
packets/connections drops below ~1000/s the ip_vs_conn slab usage no
longer increases. Could it be that the connections are simply not expired
fast enhough?? That once you go above a certain no# of cons/sec new ones
are simply created faster than old ones are expired? Just guessing
here....
I tried to look at the code to see how/when where the connections are
expired. I something with timers... hmmmm.... 1000 cons/sec... HZ=1000...
but I can't figure out how it works enought to tell me if this has
anything to do with anything...
ANY help welcome... Right now I'm rebooting boxes every 24-48 hours... not
exactly what I had in mind when I thought LVS would help in creating a
high-available service... :(
Rgds,
Mark.
On Tue, 3 May 2005, Mark de Vries wrote:
> On Tue, 3 May 2005, Francois JEANMOUGIN wrote:
>
> >
> > Mark de Vries:
> >
> > > No... I'm using gatewaying/direct-routing, see the '-g' in the script.
> >
> > Sorry, I'm sick not completely awake. Anyway.
> >
> > > That thread talks about 'ip_dst_cache' groowing.. in my case it is clearly
> > > 'ip_vs_conn' that's growing. And also ip_conntrac is not used on the
> > > box...
> >
> > What are the states of the connections in the table (ipvsadm -Lcn)? Did you
> > try to reduce some of the timeouts IPVS is using to deduce the state of a
>
> Most are 'UDP' (the state)... I'm balancing DNS remember :)
>
> > connection? In DR mode, IPVS only sees incoming packets, so, it has only one
> > information abour connection state. I use the following timeouts:
> >
> > et.ipv4.vs.secure_tcp = 3
> > net.ipv4.vs.timeout_finwait = 2
>
> These are not for UDP...
>
> I did try "ipvsadm --set 0 0 10". Most 'connections' will only ever see
> one packet... so the entries can be expired almost right away.
>
> What I (still) don't understand is that when looking at the connections I
> see the timer count down from 59 to 0... (shouldn't that be from 10..
> considering the command I '--set 0 0 10' ) And then instead of the entry
> disapearing the counter starts at 59 again... Is that normal?? Is is
> (related to) the problem?
>
> Regards,
> Mark.
>
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--
What's a girl like you doing in a nice place like this?
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