UseCompressedStrings

[Fabrizio Milo aka misto <mi...@gmail.com>]

Hi everyone,

in the tuning guide is mentioned to use the flag UseCompressedStrings
for optimization, but when I launch it on the latest java machine I
get this warning:

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option
UseCompressedStrings; support was removed in 7.0

https://spark.incubator.apache.org/docs/latest/tuning.html#tuning-data-structures


Fabrizio
-- 
LinkedIn: http://linkedin.com/in/fmilo
Twitter: @fabmilo
Github: http://github.com/Mistobaan/
-----------------------
Simplicity, consistency, and repetition - that's how you get through.
(Jack Welch)
Perfection must be reached by degrees; she requires the slow hand of
time (Voltaire)
The best way to predict the future is to invent it (Alan Kay)

Re: UseCompressedStrings

[Shivaram Venkataraman <sh...@eecs.berkeley.edu>]

Right - UseCompressedStrings has been removed from the JVM in 7.0. We
should update our docs to reflect this.

Thanks
Shivaram

On Fri, Feb 21, 2014 at 4:40 PM, Fabrizio Milo aka misto
<mi...@gmail.com> wrote:
> Hi everyone,
>
> in the tuning guide is mentioned to use the flag UseCompressedStrings
> for optimization, but when I launch it on the latest java machine I
> get this warning:
>
> Java HotSpot(TM) 64-Bit Server VM warning: ignoring option
> UseCompressedStrings; support was removed in 7.0
>
> https://spark.incubator.apache.org/docs/latest/tuning.html#tuning-data-structures
>
>
> Fabrizio
> --
> LinkedIn: http://linkedin.com/in/fmilo
> Twitter: @fabmilo
> Github: http://github.com/Mistobaan/
> -----------------------
> Simplicity, consistency, and repetition - that's how you get through.
> (Jack Welch)
> Perfection must be reached by degrees; she requires the slow hand of
> time (Voltaire)
> The best way to predict the future is to invent it (Alan Kay)