On 10-07-21 7:54 PM, Ben Caradoc-Davies wrote:
> Good solution, Justin. I'm going to start using UseCompressedOops myself!
>
> Does your use of this option indicate that Hudson is running Java 6
> 64-bit? Does this mean that 64-bit builds now work? Do we have CI
> coverage on Java 5 32-bit?

As I am finding out no. 2.6.x built with a 64 bit jvm but trunk failed 
(coverage stuff). At this point I am probably going to try and just drop 
back to a 32 bit jvm.
>
> We might now have a new platform to test as UseCompressedOops objects
> could have different hashCode and thus HashMap behaviour. My old
> bugbear. :-)
>
> app-schema is known to build with -Dtest.maxHeapSize=256m on 32-bit
> (thanks to Gabriel's l33t skills!) but definitely needs more on 64-bit.
> EMF is quite bloated to start with, and app-schema does not share all
> the schemas it could.
>
> Kind regards,
> Ben.
>
>
> On 22/07/10 01:56, Justin Deoliveira wrote:
>> Actually I take it back, setting the -XX:+UseCompressedOops parameter
>> does indeed fix the problem. Nice one Andrea!!
>>
>> On 10-07-21 8:04 AM, Andrea Aime wrote:
>>> Justin Deoliveira wrote:
>>>> Unfortunately it did not go so well. I could not get one build out due
>>>> to memory errors. Which seem to happen only in the app-schema module.
>>>> Ben any ideas there? Have you ever seen this. I have replicated memory
>>>> settings from the other hudson so it should be the same.
>>>>
>>>> Anyways, I will continue on debugging these issues and will have to
>>>> plan
>>>> the migration for something later this week hopefully.
>>>
>>> Interesting. Are we switching from a 32bit host to a 64bit one?
>>> It may be relevant as object pointers in 64bit use twice as much
>>> space, so if we have a slew of small objects the increase can
>>> be significant.
>>>
>>> Modern JVM should have a switch for compressed obj pointers that
>>> should make them go back to use 32bit pointers if possible, but
>>> I fear those are available only in JDK 6 as an advanced option,
>>> and JDK 7 by default (or something like that)
>>>
>>> Cheers
>>> Andrea
>>>
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>>
>
>


-- 
Justin Deoliveira
OpenGeo - http://opengeo.org
Enterprise support for open source geospatial.

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