15.5. Using Eviction

15.5.1. Initialize Eviction

To initialize eviction, set the eviction element's max-entries attributes value to a number greater than zero. Adjust the value set for max-entries to discover the optimal value for your configuration. It is important to remember that if too large a value is set for max-entries, JBoss Data Grid runs out of memory.
The following procedure outlines the steps to initialize eviction in JBoss Data Grid:

Procedure 15.1. Initialize Eviction

  1. Add the Eviction Tag

    Add the <eviction> tag to your project's <cache> tags as follows: 
    <eviction />

  2. Set the Eviction Strategy

    Set the strategy value to set the eviction strategy employed. Possible values are LRU, UNORDERED and LIRS (or NONE if no eviction is required). The following is an example of this step: 
    <eviction strategy="LRU" />

  3. Set the Maximum Entries

    Set the maximum number of entries allowed in memory. The default value is -1 for unlimited entries.
    1. In Library mode, set the maxEntries parameter as follows: 
      <eviction strategy="LRU" maxEntries="200" />
    2. In Remote Client Server mode, set the max-entries as follows: 
      <eviction strategy="LRU" max-entries="200" />
Result

Eviction is configured for the target cache.

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