Re: [xwiki-devs] Frrequently AJAX request caused PernGen Exception OutOfMemory

Thanks. But now I don't know any other way to get and access MongoDB in xwiki. Any links or documents? 2013/9/26 Thomas Mortagne <thomas.mortagne(a)xwiki.com> > Your issue may be caused by @Grab, that download and load jars into the > permgen. > > On Thu, Sep 26, 2013 at 9:58 AM, Quân Lê <lequan.moon(a)gmail.com>

> > I tried with XX:MaxPermSize=256M but with 1 request per 2sec. > > The PermGen memory is going like 15mb/min. > > All the code of responing page is just like this: > > {{groovy}} > > @Grab(group='com.gmongo', module='gmongo', version='1.0') > > import com.gmongo.GMongo > > import groovy.json.* > > > > def data = [] // a list contain data > > > > def gmongo = new GMongo() > > def dbConn = gmongo.getDB('dbtest') > > // Not query database but it already go crazy > > gmongoObject.close() > > > > // For GC > > dbConn = null > > gmongoObject = null > > > > // Convert into JSON > > def slurper = new JsonSlurper() > > def builder = new JsonBuilder(data) > > println builder.toString() > > > > // For GC > > slurper = null > > builder = null > > {{/groovy}} > > > > > > 2013/9/26 Thomas Mortagne &lt;thomas.mortagne(a)xwiki.com&gt; > > > >> Well without changing your script all I can suggest is to allocate > >> more permgen to java using > >> > >> -XX:MaxPermSize=<enough memory>M > >> > >> > >> On Thu, Sep 26, 2013 at 9:25 AM, Quân Lê &lt;lequan.moon(a)gmail.com&gt;

> >> > Thank you > >> > It's true that the more script responing page processes, the more > classes > >> > are loaded. > >> > Is there anyway to prevent OutOfmemory Exception happened? > >> > > >> > > >> > 2013/9/26 Thomas Mortagne &lt;thomas.mortagne(a)xwiki.com&gt; > >> > > >> >> I doubt it has anything to do with the request itself, it's

> >> >> more related to what your page is doing. From what I understand

> >> >> page create directly or indirectly new classes. Note that most

> >> >> languages compile the script into a new Java class before

> it > >> >> so if you execute a lot of very big scripts at the same time it

> >> >> probably be pretty costy for the permgen. Something else that

> be > >> >> costy is if you load a jar in this page for example with the

> >> >> property of script macros. > >> >> > >> >> On Thu, Sep 26, 2013 at 8:53 AM, lequan.moon <

> >> >> wrote: > >> >> > Hi, > >> >> > I'm making an application that make an AJAX request frequently

> >> page > >> >> to > >> >> > page in xwiki. > >> >> > About 1 per 10s > >> >> > The request look like this: > >> >> > > >> >> > $.ajax({ > >> >> > type: "GET", > >> >> > crossDomain: true, > >> >> > url:

> >> >> > dataType: 'text', > >> >> > data: data2send, > >> >> > success: function(result) {...}, > >> >> > error: function(xhr, status, error) { > >> >> > console.log(error) > >> >> > console.log(status) > >> >> > console.log(xhr) > >> >> > } > >> >> > }); > >> >> > > >> >> > And respone is simple as a text or something like a JSON Map,

> >> >> > I took a look at jconsole and here it is > >> >> > < > >> >> > >> >

> >> >> > > >> >> > Please help! I don't understand how xwiki works on this. > >> >> > > >> >> > Thank in advanced. > >> >> > > >> >> > > >> >> > > >> >> > > >> >> > -- > >> >> > View this message in context: > >> >> > >> >

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