Repeated ParNews when Young Gen is Empty?

[Simone Bordet]

Hi,

On Mon, Jul 29, 2013 at 11:32 PM, Andrew Colombi <acolombi at palantir.com> wrote:
> All,
>
> The problem in production was resolved by reducing the amount of
> allocation we were doing, and thereby reducing the pressure on the garbage
> collector.  The log output is still very strange to me, and we're going to
> continue to investigate the potential for a JVM bug.
>
> One cool thing this experience taught me is a new debugging technique to
> identify allocation hotspots.  Basically, with a combination of PrintTLAB
> and jstacks, you can identify which threads are heavily allocating and
> what those threads are doing.  We were able to pinpoint a small number of
> threads doing the lion's share of the allocations, and improve their
> efficiency.

Care to detail this one, perhaps with an example of yours ?

Thanks !

-- 
Simone Bordet
http://bordet.blogspot.com
---
Finally, no matter how good the architecture and design are,
to deliver bug-free software with optimal performance and reliability,
the implementation technique must be flawless.   Victoria Livschitz