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From Denis Magda <dma...@apache.org>
Subject Re: memory usage in 2.3
Date Wed, 13 Dec 2017 23:56:36 GMT
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:
https://apacheignite.readme.io/docs/durable-memory-tuning
https://apacheignite.readme.io/docs/jvm-and-system-tuning

—
Denis

> On Dec 12, 2017, at 10:50 PM, shawn.du <shawn.du@neulion.com.cn> 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.
> 
> Thanks
> Shawn
> 
> On 12/13/2017 07:36,Denis Magda<dmagda@apache.org> <mailto:dmagda@apache.org>
wrote: 
> Shawn,
> 
> If you still need to use the on-heap caching by some reason make sure you enabled an
eviction policy:
> https://apacheignite.readme.io/docs/evictions#section-java-heap-cache <https://apacheignite.readme.io/docs/evictions#section-java-heap-cache>
> 
> 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.
> 
> —
> Denis
> 
>> On Dec 12, 2017, at 4:37 AM, slava.koptilin <slava.koptilin@gmail.com <mailto:slava.koptilin@gmail.com>>
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.
>> 
>> Thanks!
>> 
>> 
>> 
>> --
>> Sent from: http://apache-ignite-users.70518.x6.nabble.com/ <http://apache-ignite-users.70518.x6.nabble.com/>
> 
> 


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