Your final statement seems correct to me, but I said exactly that, I don't know where did you get that setOffHeapMaxMemory must be 0. May be you use some weird email client which renders >> signs wrong?
Sergi 2016-11-04 22:25 GMT+03:00 Denis Magda <dma...@gridgain.com>: > Sergi, > > Thanks, now I found the exact conditions that switch the indexes from > on-heap to off-heap. > > But looks like you did a misprint in your conclusion saying that > setOffHeapMaxMemory should be 0. > > Thus from the user standpoint we can say, that if either > setOffHeapMaxMemory > >> = 0 or setMemoryMode is set to any of off-heap modes, then indexes will > go > > off-heap. > > In fact, as you elaborated earlier, it has to be >= 0 which leads to the > following final statement: > > SQL engine will store indexes in the off-heap region if > setOffHeapMaxMemory parameter >= 0 or setMemoryMode is set to any supported > off-heap mode. It worth to mention that setOffHeapMaxMemory is set to 0 > automatically if it’s value is less than -1 and one of off-heap memory > modes is used. > > Are we on the same page now? > > — > Denis > > > On Nov 4, 2016, at 1:51 AM, Sergi Vladykin <sergi.vlady...@gmail.com> > wrote: > > > > Denis, > > > > I checked the code now as well. I actually was wrong, but your statement > is > > wrong either. > > > > If we are talking about indexes then the exact condition when index will > be > > off-heap is the following: either setOffHeapMaxMemory >= 0 or > setMemoryMode > > is OFFHEAP_TIERED. > > > > But if setMemoryMode is set to one of off-heap modes and > setOffHeapMaxMemory is > > -1, then setOffHeapMaxMemory is silently getting switched to 0. > > > > Thus from the user standpoint we can say, that if either > setOffHeapMaxMemory > >> = 0 or setMemoryMode is set to any of off-heap modes, then indexes will > go > > off-heap. > > > > Sergi > > > > 2016-11-04 6:30 GMT+03:00 Dmitriy Setrakyan <dsetrak...@apache.org>: > > > >> Do we currently throw an exception if memory mode is set to off-heap by > the > >> max-offheap-memory is set to "-1"? Otherwise, it can get very confusing > to > >> users. > >> > >> On Thu, Nov 3, 2016 at 10:22 AM, Denis Magda <dma...@gridgain.com> > wrote: > >> > >>> Sergi, > >>> > >>> Referring to your response and the source code I should say that, in > >> fact, > >>> the documentation has to state the following: > >>> > >>> “To place both data and indexes in off heap memory CacheConfiguration. > >> setMemoryMode > >>> has to be set to one of off heap modes and CacheConfiguration. > >> setOffHeapMaxMemory > >>> has to be set to a value different from -1 (disabled). If at least one > of > >>> these conditions is not met then both data and indexes will be located > in > >>> on heap memory” > >>> > >>> Is this statement correct? > >>> > >>> — > >>> Denis > >>> > >>>> On Nov 3, 2016, at 2:53 AM, Sergi Vladykin <sergi.vlady...@gmail.com> > >>> wrote: > >>>> > >>>> Prachi, > >>>> > >>>> In [2] we refer to the same CacheConfiguration.setOffHeapMaxMemory > >>>> property, so [1] is correct. If setOffHeapMaxMemory is disabled (set > to > >>>> -1), then indexes will never be stored offheap, regardless of > >>> setMemoryMode > >>>> setting. > >>>> > >>>> Probably we have to change [2] to make it clear, that it is about > >>>> setOffHeapMaxMemory > >>>> but not about setMemoryMode. > >>>> > >>>> Sergi > >>>> > >>>> > >>>> 2016-11-03 2:25 GMT+03:00 Prachi Garg <pg...@gridgain.com>: > >>>> > >>>>> Engineers, > >>>>> > >>>>> I was going through documentation for Off-Heap SQL Indexes > >>>>> <https://apacheignite.readme.io/docs/sql-queries#off-heap- > sql-indexes > >>> > >>> and > >>>>> found two contradicting statements- > >>>>> > >>>>> According to [1] - " `CacheConfiguration.setOffHeapMaxMemory` is > the > >>> only > >>>>> property to enable or disable off-heap indexing. While > >>>>> CacheConfiguration.setMemoryMode is used to configure off-heap > memory > >>>>> <https://apacheignite.readme.io/v1.7/docs/off-heap-memory>, it does > >> not > >>>>> have any effect on indexing." > >>>>> > >>>>> According to [2] - "Note that when off-heap memory is configured, > >>> Ignite > >>>>> will store query indexes off-heap as well." > >>>>> > >>>>> > >>>>> Which one is true? > >>>>> > >>>>> [1] - https://apacheignite.readme.io/docs/sql-queries#off-heap- > >>> sql-indexes > >>>>> > >>>>> [2] - http://apacheignite.gridgain.org/docs/off-heap-memory > >>>>> > >>>>> > >>>>> Thanks, > >>>>> > >>>>> -Prachi > >>>>> > >>> > >>> > >> > >
