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From Sergey Chugunov <sergey.chugu...@gmail.com>
Subject Re: Memory policies examples fails
Date Mon, 17 Apr 2017 13:03:18 GMT
Denis,

I found an issue with the example: each cache introduces some memory
overhead (mostly for cache partitions data structures) and it must be
counted in MemoryPolicy size.

To fix the example just increase size of *10MB_Region_Eviction *to 15 MB
and *5MB_Region_Swapping *to 10 MB.

I didn't find any documentation on this, but I think it is part of new
PageMemory-based storage so it needs to be documented as part of ignite-2.0
release.

Thanks,
Sergey.



On Mon, Apr 17, 2017 at 2:50 PM, Sergey Chugunov <sergey.chugunov@gmail.com>
wrote:

> Denis,
>
> It looks like partition exchange mechanism allocates a lot of pages right
> after the cache is started.
> I'm trying to figure out what's going on.
>
> Thanks,
> Sergey.
>
> On Mon, Apr 17, 2017 at 12:05 AM, Denis Magda <dmagda@apache.org> wrote:
>
>> Igniters,
>>
>> I’ve created a simple example to demonstrate how to set up various
>> policies:
>> https://github.com/apache/ignite/blob/master/examples/src/
>> main/java/org/apache/ignite/examples/datagrid/MemoryPoliciesExample.java
>>
>> However, this tiny example fails with
>>
>> Caused by: class org.apache.ignite.internal.mem.OutOfMemoryException:
>> null
>>         at org.apache.ignite.internal.pagemem.impl.PageMemoryNoStoreImp
>> l.allocatePage(PageMemoryNoStoreImpl.java:255)
>>         at org.apache.ignite.internal.processors.cache.IgniteCacheOffhe
>> apManagerImpl.allocateForTree(IgniteCacheOffheapManagerImpl.java:635)
>>         at org.apache.ignite.internal.processors.cache.IgniteCacheOffhe
>> apManagerImpl.createCacheDataStore0(IgniteCacheOffheapManage
>> rImpl.java:727)
>>         at org.apache.ignite.internal.processors.cache.IgniteCacheOffhe
>> apManagerImpl.createCacheDataStore(IgniteCacheOffheapManager
>> Impl.java:711)
>>         at org.apache.ignite.internal.processors.cache.distributed.dht.
>> GridDhtLocalPartition.<init>(GridDhtLocalPartition.java:162)
>>         at org.apache.ignite.internal.processors.cache.distributed.dht.
>> GridDhtPartitionTopologyImpl.createPartition(GridDhtPartitio
>> nTopologyImpl.java:718)
>>         at org.apache.ignite.internal.processors.cache.distributed.dht.
>> GridDhtPartitionTopologyImpl.initPartitions0(GridDhtPartitio
>> nTopologyImpl.java:405)
>>         at org.apache.ignite.internal.processors.cache.distributed.dht.
>> GridDhtPartitionTopologyImpl.beforeExchange(GridDhtPartition
>> TopologyImpl.java:569)
>>         at org.apache.ignite.internal.processors.cache.distributed.dht.
>> preloader.GridDhtPartitionsExchangeFuture.distributedExchange(GridDhtPar
>> titionsExchangeFuture.java:844)
>>         at org.apache.ignite.internal.processors.cache.distributed.dht.
>> preloader.GridDhtPartitionsExchangeFuture.init(GridDhtPartit
>> ionsExchangeFuture.java:573)
>>         at org.apache.ignite.internal.processors.cache.GridCachePartiti
>> onExchangeManager$ExchangeWorker.body(GridCacheP
>> artitionExchangeManager.java:1800)
>>         ... 2 more
>>
>>
>>
>> What I’m doing wrong? Alex G., could you take a look? Probably I’m
>> missing something due to a lack of documentation.
>>
>> —
>> Denis
>>
>>
>

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