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Configuring the Native Memory Store

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The Native Memory Store is a pluggable memory manager. It allows you to set up different configurations, or stores, for your application’s data structures on a single JVM. These memory stores form part of a common access layer which scales up to use a configured amount of memory on the JVM.

As well as providing more predictable application scaling, using a Native Memory Store boosts performance, reduces latency, and minimizes garbage collection pauses.

Configuring a Native Memory Store

Below are the configuration options for the Native Memory Store.

Field Description

allocatorType

Specifies the mechanism for allocating memory; either STANDARD or POOLED.

size

Size of the total native memory to allocate.

minBlockSize

Size of smallest block of memory to allocate.

pageSize

Size of the page in bytes to allocate as a block of memory.

metadataSpacePercentage

Percentage of the allocated native memory that is used for the metadata of other map components such as index (for predicates), offset, etc.

Example Configuration

The example configuration does the following:

  • Creates a cluster with Native Memory and the POOLED allocator enabled.

  • Configures a map on the cluster to use native memory.

Example Hazelcast configuration
apiVersion: hazelcast.com/v1alpha1
kind: Hazelcast
metadata:
  name: hazelcast
spec:
  nativeMemory:
    allocatorType: POOLED
    size: 512M
Example Map configuration
apiVersion: hazelcast.com/v1alpha1
kind: Map
metadata:
  name: map
spec:
  hazelcastResourceName: hazelcast
  inMemoryFormat: NATIVE
Example Cache configuration
apiVersion: hazelcast.com/v1alpha1
kind: Cache
metadata:
  name: cache
spec:
  hazelcastResourceName: hazelcast
  inMemoryFormat: NATIVE
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