Eviction Policy selection when EvictionStrategy.REMOVE

[dnvsivaprasad]

Hi Team,

I’m currently working on Infinispan cache eviction.

While testing with Infinispan versions 13.x to 16.0.1, I noticed that eviction appears to follow a FIFO-like behavior instead of LFU.

Scenario:

Configure cache with maxCount = 10

• Insert entries with keys 1 to 10

• Access a few of these entries multiple times to increase their frequency

• Add new entries 11 to 15

Observed behavior:

• Entries 1 to 5 are evicted

Eviction seems to be based on insertion order, not access frequency

Expected behavior:

Least Frequently Used (LFU) entries should be evicted instead of the earliest inserted ones.

Configuration used:

val config = ConfigurationBuilder()
    .memory()
    .maxCount(10)
    .whenFull(EvictionStrategy.REMOVE)
    .build()

Could you please clarify whether LFU eviction is supported with this configuration, or if additional settings are required to enable frequency-based eviction?

Thanks in advance.

[wburns]

Use 16.0.2 instead, this was fixed in #16104. The problem was the underlying container didn't register the get as an access.