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Oeps, forgot to fill in the subject...
On Sun, 1 May 2005 markdv.lvsuser@xxxxxxxxxx wrote:
>
> Hi,
>
> I'm using ipvs to loadbalance 4 caching dns servers and having some
> problems with memory (slab) usage on the directors. I have 9 vips, so 18
> services (tcp & udp) all with the same 4 realservers. Using DR.
>
> Basically the problem is that kernel memory keeps growing until the box
> goes OOM.
>
> It looks like enties in connection tracking table are never removed.
>
> In an attempt to limit the no of entries I issue an 'ipvsadm --set 0 0 10'
> expecting to see the entries expired (and removed from the table) in 10
> seconds. But after more than an hour the backup director (having been
> activ only a short time while the primary was rebooted) still has 696526
> entries in the table.
>
> This is a dual Xeon(TM) CPU 2.80GHz box and a 'cat ip_vs_conn | wc -l'
> takes 8 minutes!!
>
> Some things I don't understand:
>
> Although I do a 'ipvsadm --set 0 0 10' entries in /proc/net/ip_vs_conn
> still have larger timeout values (last column right?!)
>
> UDP C3F11870 0504 C3F14D36 0035 0A1F42B4 0035 UDP 59
>
> Then, when continuously 'grepping' for an entry I see that value decrease
> to 0... and then - to my suprise - it just jumps back to 59 instead of
> disapearing...
>
> This is using a vanilla 2.6.10 kernel.
>
> What's wrong? Or, what am I not understanding?
>
> Rgds,
>
> Mark.
>
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