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# Class FifoEvictionPolicy

Eviction policy based on First In First Out (FIFO) algorithm with batch eviction support.

The eviction starts in the following cases: The cache size becomes BatchSize elements greater than the maximum size; The size of cache entries in bytes becomes greater than the maximum memory size; The size of cache entry calculates as sum of key size and value size.

Note: Batch eviction is enabled only if maximum memory limit isn't set.

This implementation is very efficient since it does not create any additional table-like data structures. The FIFO ordering information is maintained by attaching ordering metadata to cache entries.

##### Inheritance

System.Object
EvictionPolicyBase
FifoEvictionPolicy

##### Implements

IEvictionPolicy

##### Inherited Members

EvictionPolicyBase.DefaultBatchSize
EvictionPolicyBase.DefaultMaxSize
EvictionPolicyBase.DefaultMaxMemorySize
EvictionPolicyBase.BatchSize
EvictionPolicyBase.MaxSize
EvictionPolicyBase.MaxMemorySize
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()

###### Namespace: Apache.Ignite.Core.Cache.Eviction

###### Assembly: Apache.Ignite.Core.dll

##### Syntax

    public class FifoEvictionPolicy : EvictionPolicyBase, IEvictionPolicy

### Implements

IEvictionPolicy