Re: [xtext-dev] OutOfMemoryError in an XText-generated editor

["Oberhuber, Martin" <Martin.Oberhuber@xxxxxxxxxxxxx>]

Thanks Jan - Much appreciated !

We'll digest your answers. The hints about backtracking and lookahead look very helpful. 

Note that the 433MB were only retained heap from under that one Job. There was other things going on too, so the Heap was in fact used up. Also, extending heap to 2g while keeping -XX:MaxPermSize the same made the problem go away so I'm pretty sure it wasn't a PermSize issue.

I'm afraid we can't share (even parts of) our grammar, but your hints are helping a lot our investigations. 

We'll try the grammar improvements you suggested, and potentially turning off the reconciler on large documents (Like CDT's scalability mode does in CSourceViewerScalableConfiguration [1]). Would such a "scalability mode" be interesting for XText based Editors in general, has anybody thought about this before ?

Regarding Xtext 2.6, why do you think it would potentially help ?

[1] http://git.eclipse.org/c/cdt/org.eclipse.cdt.git/tree/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/text/CSourceViewerScalableConfiguration.java

Thanks,
Martin
--
Martin Oberhuber, SMTS / Product Owner - Development Tools, Wind River
direct +43.662.457915.85  fax +43.662.457915.6


-----Original Message-----
From: xtext-dev-bounces@xxxxxxxxxxx [mailto:xtext-dev-bounces@xxxxxxxxxxx] On Behalf Of Jan Koehnlein
Sent: Wednesday, August 06, 2014 11:40 AM
To: xtext-dev list
Subject: Re: [xtext-dev] OutOfMemoryError in an XText-generated editor

Martin,

I've answerd your post in the forum.

Note that itemis offers professional services especially for advanced scenarios such as large scale models.

Best regards
Jan

Am 06.08.2014 um 10:28 schrieb Oberhuber, Martin <Martin.Oberhuber@xxxxxxxxxxxxx>:

> Dear XText committers,
>  
> Last week I posted a question on the XText Newsgroup but got no response so far:
> https://www.eclipse.org/forums/index.php/m/1404199/#msg_1404199
>  
> We did some investigations ourselves and found that disabling the editor's "update" method helps. So it looks like there's indeed too much work being done when typing into the editor . but is this the right approach ? And where might be a proper hook adding sort of a "scalability mode" for opening large files in an XText-generated editor ? What are the team's experiences with editing large files ?
>  
> Any thoughts on this would be highly appreciated !
>  
> Thanks,
> Martin
> --
> Martin Oberhuber, SMTS / Product Owner - Development Tools, Wind River 
> direct +43.662.457915.85  fax +43.662.457915.6
>  
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-
Dr. Jan Köhnlein
Senior Software Architekt

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jan.koehnlein@xxxxxxxxx


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