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TRAIN_00774.eml
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NoneNonesomewhat concerned that this is a demonstrable regression between Java 5 =
and Java 6 - however there are several other factors that can impact =
memory use:
- 32 vs. 64-bit (biggest culprit)
- 1.5/client/32-bit tuned garbage collection options running on =
1.6/server/64-bit
- client vs. server HotSpot itself (more aggressive compilation and =
storage of compiled code)
Anecdotally, I've talked to several people who have large long running =
64-bit processes on Snow Leopard with 2GB-of-RAM machines who were =
having a miserable time. While reverting to 32-bit may be a quick fix =
for some, others who tuned the GC parameters or turned on =
-XX:+UseCompressedOops (which compresses Java references to 32-bit =
values in the heap) found that they could reclaim or even exceed their =
original 32-bit performance (since they were still using the server =
JVM).
Since someone mentioned that NetBeans 6.9 Beta was working well, I'd =
suggest taking a look at it's JVM options and see if there wasn't some =
tweaking done to optimize it for a 64-bit by default world.
Best of luck,
Mike Swingler
Java Runtime Engineer
Apple Inc.
On Apr 23, 2010, at 7:06 AM, Dave Minnigerode wrote:
> I too have been using netbeans 6.8 on 10.5 and 10.6 with the default =
jvm doing java 6 work... It's just stable enough for daily use. I do =
restart NB every few hrs when the memory use gets out of hand =
(apparently some object leaks with the apple jvm/nb combo).... can't =
switch it back to java 5, so kinda stuck with it. So I'm probably just =
going to switch to IntilliJ, I've found it's performance to be a lot =
better than NB overall. File tree nav is painless for example.
>=20
> I'm kinda sad about it, but got work to get done...
>=20
> On Apr 23, 2010, at 8:52 AM, [email protected] wrote:
>=20
>> Hmm. I'm using the late 2006 Macbook Pro (2.33 GHz upgraded to 4 GB =
[3.5 GB] RAM). I'm using the latest Java through Software Update, and my =
app is Swing-based (using Matisse) and using the Swing Application =
Framework with an embedded Derby database, though I will note that I =
have issues even before any files are open. Just expanding the tree to =
get to a file for opening tended to take about 10 seconds, and that's =
assuming I didn't switch to another window in the meantime.
>>=20
>> I just did a full wipe/reinstall of Netbeans to see if my settings =
were a problem, but I had no change until I loaded in Java 5 and saw a =
significant difference. I'll be trying out the suggestions people made =
about using a different target platform than the one Netbeans is running =
on, but I'm starting to wonder if there is an issue with my system.
>>=20
>> On Apr 23, 2010 9:22am, David Loeffler <[email protected]> wrote:
>>> I use NetBeans 6.9 Beta (I was using 6.8 but want the metadata =
support for entity beans) and I have no problems. I have a late 2007 =
MBP 17" and am using java version "1.6.0_17" . I am developing a Java 6 =
running on GlassFish using Postgres as the database. This is a port of =
he Java EE 5 app I architected in 2005 and deployed in 2006 on JBoss =
using eclipse / JBoss Dev Studio as the IDE. It is a lot more than a =
port since there a number of enhancements.
>>>=20
>>>=20
>>>=20
>>> I have made no changes to the Java or preferences for NetBeans. Of =
course the Java for my app is 1.6 and NetBeans runs on 1.6 as well.
>>>=20
>>>=20
>>>=20
>>> I do see an increase in activity when there is an open dialog box so =
I keep an eye out for them. I watch CPU activity since I had an issue =
with Kernel panics a month ago. Turned out to be a combination of a =
failing disk drive and a memory stick. Replaced the 160G drive with 500G =
and the 2G stick with 4G (to make total of 6G). Apple store guys could =
not see the problems but through some handy tools and taking to external =
service personnel we were able to zero in on the problem and fix it.
>>>=20
>>>=20
>>>=20
>>> Side note: I have shutdown plugins in Safari mainly to keep Flash =
from running. Some sites caused Flash plugin to push usage up to 20% or =
more. I have been using iStat menu (I recommend) and also launch =
activity monitor at login just to keep an eye on things.
>>>=20
>>>=20
>>>=20
>>> On Apr 23, 2010, at 1:06 AM, Jon Eisenstein wrote:
>>>=20
>>>=20
>>>=20
>>>> I imagine this topic comes up every so often but I haven't been =
able to find it in the archives. =46rom what I understand, there's some =
issue with Snow Leopard and Java 6 that makes Netbeans 6.8 near =
unusable. (I've had to do my development on a lesser-powered PC because =
there, things will actually open without pegging the CPU at 100% and =
becoming unresponsive.) Following a tip, I used Pacifist to reinstall =
Leopard's Java 5 back onto the system, set it as the default, and tried =
to launch Netbeans. Lo and behold, it was fast, responsive and showed =
none of the problems I'd been used to. Unfortunately, it made it so that =
I couldn't work on my Java 6-based app!
>>>=20
>>>>=20
>>>=20
>>>> So, what is the actual situation here? Is this a known issue with =
the Apple JVM that's (hopefully) going to get fixed? Is this a bug in =
Netbeans? Am I the only one seeing issues this bad, and so it could be a =
problem with my setup? Is there a workaround? Any help would be vastly =
appreciated -- the Windows box is having disk issues, and I'd love to =
move my primary development to the Macbook Pro as soon as possible. And =
if push comes to shove, I may have to just rearchitect the project into =
Java 5 (which would not be a simple task.)
>>>=20
>>>> _______________________________________________
>>>=20
>>>> Do not post admin requests to the list. They will be ignored.
>>>=20
>>>> Java-dev mailing list ([email protected])
>>>=20
>>>> Help/Unsubscribe/Update your Subscription:
>>>=20
>>>> =
http://lists.apple.com/mailman/options/java-dev/ddl.newsletters%40mac.com
>>>=20
>>>>=20
>>>=20
>>>> This email sent to [email protected]
>>>=20
>>>=20
>>>=20
>> _______________________________________________
>> Do not post admin requests to the list. They will be ignored.
>> Java-dev mailing list ([email protected])
>> Help/Unsubscribe/Update your Subscription:
>> =
http://lists.apple.com/mailman/options/java-dev/dave%40minnigerode.org
>>=20
>> This email sent to [email protected]
> _______________________________________________
> Do not post admin requests to the list. They will be ignored.
> Java-dev mailing list ([email protected])
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>=20
> This email sent to [email protected]
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