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On 11 Dec 2012 16:44, "James Graves" <james.c.graves.jr@gmail.com> wrote:
>
> Roberto Ierusalimschy <roberto@inf.puc-rio.br> wrote:
>
> > * Because the GC traverses all objects in the system, it is one of the
> > main "candidates" to suffer from a memory corruption created somewhere
> > else.
>
> There was a recent article linked via Hacker News about one of the
> popular web cache applications (maybe it was Varnish?). Anyway, this
> program uses a lot of RAM, and they've been seen un-reproducable bugs
> occasionally. The authors suspect it is a hardware problem in many
> cases, so they've incorporated a memory test as part of their crash
> dump. They were doing something clever with multiple XOR passes to
> check the memory and still preserve the original data.
>
> At any rate, many hosting providers are not using ECC memory on their
> servers, and as memory sizes keep getting larger and larger (and
> process size for the memory itself smaller and smaller) the rate of
> bit errors due to cosmic radiation keeps going up.
>
> The short version: also try to run a memory test on the server and see
> if that turns up anything.
>
> James Graves
>
It was Redis not Varnish.
(Redis also uses Lua)
Justin