> I can’t see another way of letting . Net know that it can’t have access to all the ‘free’ memory in the process
You don't need to tell .NET how much memory is currently available. It is the job of the OS. .NET can "see" the size of the unmanaged heap. To quote another explanation [1]: > The point of AddMemoryPressure is to tell the garbage collector that there's a large amount of memory allocated with that object. > If it's unmanaged, the garbage collector doesn't know about it; only the managed portion. > Since the managed portion is relatively small, the GC may let it pass for garbage collection several times, essentially wasting memory that might need to be freed. I really don't think AddMemoryPressure is the right thing to do in your case. If you run into OOM issues, then look into Ignite memory region settings [2] and/or adjust application memory usage on the .NET side, so that the sum of those is not bigger than available RAM. [1] https://stackoverflow.com/questions/1149181/what-is-the-point-of-using-gc-addmemorypressure-with-an-unmanaged-resource [2] https://ignite.apache.org/docs/latest/memory-configuration/data-regions#configuring-default-data-region On Tue, Jul 11, 2023 at 11:48 AM Raymond Wilson <[email protected]> wrote: > How do Ignite .Net server nodes manage this memory issue in other > projects? > > On Tue, Jul 11, 2023 at 5:32 PM Raymond Wilson <[email protected]> > wrote: > >> Oops, commutes => committed >> >> On Tue, 11 Jul 2023 at 4:34 PM, Raymond Wilson < >> [email protected]> wrote: >> >>> I can’t see another way of letting . Net know that it can’t have access >>> to all the ‘free’ memory in the process when a large slab of that is spoken >>> for in terms of memory commutes to Ignite data regions. >>> >>> In the current setup, as time goes on and Ignite progressively fills the >>> allocated cache ram then system behaviour changes and can result in out of >>> memory issues. I think I would prefer consistent system behaviour wrt to >>> allocated resources from the start. >>> >>> Raymond. >>> >>> On Tue, 11 Jul 2023 at 3:57 PM, Pavel Tupitsyn <[email protected]> >>> wrote: >>> >>>> Are you sure this is necessary? >>>> >>>> GC.AddMemoryPressure documentation [1] states that this will "improve >>>> performance only for types that exclusively depend on finalizers". >>>> >>>> [1] >>>> https://learn.microsoft.com/en-us/dotnet/api/system.gc.addmemorypressure?view=net-7.0 >>>> >>>> On Tue, Jul 11, 2023 at 1:02 AM Raymond Wilson < >>>> [email protected]> wrote: >>>> >>>>> I'm making changes to add memory pressure to the GC to take into >>>>> account memory committed to the Ignite data regions as this will be >>>>> unmanaged memory allocations from the perspective of the GC. >>>>> >>>>> I don't call seeing anything related to this for .Net clients in the >>>>> documentation. Are you aware of any? >>>>> >>>>> Raymond. >>>>> >>>>> On Mon, Jul 10, 2023 at 9:41 PM Raymond Wilson < >>>>> [email protected]> wrote: >>>>> >>>>>> Thanks Pavel, this makes sense. >>>>>> >>>>>> Querying the .Net Process instance shows this as the difference >>>>>> between PagesMemorySize (includes committed) versus WorkingSet (includes >>>>>> uses/written to) size. >>>>>> Raymond. >>>>>> >>>>>> >>>>> >>>>> -- >>>>> <http://www.trimble.com/> >>>>> Raymond Wilson >>>>> Trimble Distinguished Engineer, Civil Construction Software (CCS) >>>>> 11 Birmingham Drive | >>>>> <https://www.google.com/maps/search/11+Birmingham+Drive%C2%A0%7C%C2%A0+Christchurch,+New+Zealand?entry=gmail&source=g>Christchurch, >>>>> New Zealand >>>>> <https://www.google.com/maps/search/11+Birmingham+Drive%C2%A0%7C%C2%A0+Christchurch,+New+Zealand?entry=gmail&source=g> >>>>> [email protected] >>>>> >>>>> >>>>> <https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch> >>>>> >>>> -- >>> <http://www.trimble.com/> >>> Raymond Wilson >>> Trimble Distinguished Engineer, Civil Construction Software (CCS) >>> 11 Birmingham Drive | Christchurch, New Zealand >>> [email protected] >>> >>> >>> <https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch> >>> >> -- >> <http://www.trimble.com/> >> Raymond Wilson >> Trimble Distinguished Engineer, Civil Construction Software (CCS) >> 11 Birmingham Drive | Christchurch, New Zealand >> [email protected] >> >> >> <https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch> >> > > > -- > <http://www.trimble.com/> > Raymond Wilson > Trimble Distinguished Engineer, Civil Construction Software (CCS) > 11 Birmingham Drive | Christchurch, New Zealand > [email protected] > > > <https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch> >
