Eviction vs Expiration

Solution In Progress - Updated -

Environment

  • Jboss Data Grid (JDG) 6.x

Issue

What is the difference between Eviction and Expiration?

Resolution

For eviction when a user thread adds an entry to the cache if the cache size is over the defined limit , an old entry will be removed.In contrast expiration does have a dedicated thread that handles expired entries.

If you are referring to "time to live for a cache entry" then what you need is expiry, which is intended for a per-entry approach.
The eviction is feature is intended to control the total size of the cache.

Here is the relevant section of the docs :
https://access.redhat.com/documentation/en-US/Red_Hat_JBoss_Data_Grid/6.4/html/Administration_and_Configuration_Guide/chap-Set_Up_Expiration.html

Section 4.5 and onwards show examples of expiration configuration.

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