[rabbitmq-discuss] 2.7.1 mirrored queues leak a lot of memory on slave nodes

[Chip Salzenberg]

Indeed he is.  We're cycling through the sick cluster now, wiping
nodes in turn, to recover from this problem (and also increase disk
sizes).

On Mar 5, 8:45 am, Simon MacMullen <si... at rabbitmq.com> wrote:
> Hi Max, thanks for writing. Are you the "local Erlang expert" Chip
> referred to?
>
> On 24/02/12 15:19, Max Kalika wrote:
>
> > 3) There was one process with over 2 million pages.  It was constantly
> > running lists:zipwith/3.  Info on it showed lots and lots of messages
> > in the mailbox that just wasn't decreasing.
>
> I don't suppose you have any record of what these messages were? Or any
> logs from around this time?
>
> > I mentioned earlier that the system is *mostly* recovered.  The
> > remaining problem is disk utilization.  I suspect that since our
> > messages are marked durable, disk cleanup didn't occur.  I'm not sure
> > how to sync this up with runtime reality without restarting.
>
> So the only code in the rabbit codebase which invokes lists:zipwith/3 is
> the file_handle_cache. Hmm. Unfortunately it uses it in a rather generic
> location so this is still not exactly clear.
>
> This would help explain why disk cleanup didn't occur, since you killed
> something that was in the middle of doing some file handling.
>
> Hmm.
>
> Cheers, Simon
>
> --
> Simon MacMullen
> RabbitMQ, VMware
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