Varnish proxy goes catatonic under heavy load

[Matthew Seaman]

On 05/11/2014 12:00, Steven Hartland wrote:
> As a guess you exhausted all mbufs, 10 has much better defaults for
> these so I'd recommend updating.
> 
> If you can get in via IPMI or something similar you should be able to
> confirm.
> 
> A trick I've used in the past to recover from such a issue is to hard
> bounce the nic ports on the switch which seemed to free enough to be
> able to ssh in.

Yes, you nailed it.  We managed to recreate the effect in the lab, and
10.0 behaves much better under horrible overload.  While horribly slow,
we can still get to a shell prompt via ssh, and when we turn off the
load, the system recovers straight away.

We'll be upgrading to 10.x ASAP.

	Cheers,

	Matthew

-- 
Dr Matthew J Seaman MA, D.Phil.
PGP: http://www.infracaninophile.co.uk/pgpkey


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 971 bytes
Desc: OpenPGP digital signature
URL: <http://lists.freebsd.org/pipermail/freebsd-stable/attachments/20141106/6577a7bb/attachment.sig>