Shawn, good to hear this,

Just in case here is you can find some tips and tricks on memory and garbage collection tuning for Ignite:


On Dec 12, 2017, at 10:50 PM, shawn.du <> wrote:

Thank you Denis,

I think OOM is caused by invalid configuration. for I supposed ignite use on-heap memory,  I set a very big value for 
-Xmx -Xms, in this way, memory left for off-heap and other programs is limited. 
We are run testing now, till now all seems good.


On 12/13/2017 07:36Denis Magda<> wrote: 

If you still need to use the on-heap caching by some reason make sure you enabled an eviction policy:

Otherwise the on-heap cache will grow endlessly.

BTW, what kind of OOM you got? It might be off-heap or on-heap caching related. Share the whole stack trace.


On Dec 12, 2017, at 4:37 AM, slava.koptilin <> wrote:

Hi Shawn,

how to disable off heap completely?
You cannot disable off-heap. As of 2.0, Apache Ignite stores all the data
outside of java heap.

does it mean half in on-heap and half in off-heap?
On-heap caching allows to get a subset of the data into java heap
and can be useful for scenarios when you do a lot of cache reads on server
nodes that work with cache entries in the binary form
or invoke cache entry deserialization.


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