Peformance for local cache

[Hakan Küçük]

I have an issue with local cache perfomance. 

https://stackoverflow.com/questions/75939400/slow-hazelcast-compared-to-ehcache

How can i improve perfomance for local caches? 

[ahmet mırçık]

You can enable near cache: https://docs.hazelcast.com/hazelcast/5.2/performance/near-cache

And by setting in-memory-format to OBJECT and cache-local-entries to true, you should see better performance. Example xml config is here: https://github.com/hazelcast/hazelcast-code-samples/blob/b8bb28c8ad8d8e67019e445ad04bc8cbe9c847f3/distributed-map/nearcache/src/main/resources/hazelcast.xml#L17

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Ahmet Mırçık

[Hakan Küçük]

Thanks for the answer. it increased the performance,  

But is the data stored in the cache duplicated in this case ? both in map and near cache? 

is there any other way to avoid this?  like having a near cache without a map?

13 Nisan 2023 Perşembe tarihinde saat 16:01:21 UTC+3 itibarıyla ahmet mırçık şunları yazdı:

[Nick Pratt]

You mean something like:

Map<Key,Value> myLocalMap = new HashMap<>();

Pick your local Map of choice.  Or use Caffeine or Guava Cache if you want expiration etc.  Or use ehcache if you want overflow to disk.

N

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