I don't claim to be any sort of expert on JVM memory (and the model seems to change quite regularly) but the error did specifically mention Metaspace. And from what I remember, GC tuning is different for Heap as opposed to Metaspace. One thing I do remember is that Metaspace should be capped otherwise problems could occur.
I thought it might be worth adding in the two Metaspace parameters in netbeans.conf, see if it makes a difference. But if Metaspace changed since I last had memory problems (quite a while ago), then I'd better take a look at it again soon :-). Cheers Chris Riga On Tue, Dec 30, 2025 at 4:22 PM Michael Bien <[email protected]> wrote: > > > On 12/30/25 10:29, Chris Powell wrote: > > JM > > > > Does this happen when running code in NB? It could be a memory leak in > a class of yours and there are various tools to help track them down. > > > > I would first try increasing metaspace with: XX:MetaspaceSize and > -XX:MaxMetaspaceSize when starting NB (netbeans.conf). > > setting -Xmx (max heap size) to a larger value is sufficient these days > since metaspace is dynamic (in contrast to old permgen - which was fixed) > and will grow until there is no space left. > > -mbien > > > > If the problem persists and you're not running code, it could be an NB > memory leak. > > > > > > Chris Powell > > Riga > > > > On Tue, Dec 30, 2025 at 8:25 AM Jean-Michel DELFINO (Logarithmes) < > [email protected]> wrote: > > > > I’m working all the day in a big java server project with netbeans 27 > > > > I sometimes have this error : > > java.lang.OutOfMemoryError: Metaspace > > > > And I must quit and re-open NB... > > > > I have 64Go ram on my MacBook, I think it’s a limit in a config file > somewhere in NB… But where ? > > > > If someone could help me ! > > > > Thanks a lot ! > > > > JM > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > For further information about the NetBeans mailing lists, visit: > > https://cwiki.apache.org/confluence/display/NETBEANS/Mailing+lists > > > >
