Any ideas why would I have so many miss hits on the org.hibernate.cache.UpdateTimestampsCache. It doesn't makes sense to me, any ideas ?

2011-03-03 17:19:14,559 - Cache miss [org.hibernate.cache.UpdateTimestampsCache,TEXT]
2011-03-03 17:19:14,559 - Cache miss [org.hibernate.cache.UpdateTimestampsCache,BUNDLE]
2011-03-03 17:19:14,559 - Cache miss [org.hibernate.cache.UpdateTimestampsCache,MESSAGE]
2011-03-03 17:19:14,559 - Cache hit [texts,com.com.text.domain.Text#5933]
2011-03-03 17:19:14,575 - Cache hit [texts,sql: select this_.BUNDLE_ID as BUNDLE1_155_1_, this_.VERSION as ..
2011-03-03 17:19:14,575 - Cache miss [org.hibernate.cache.UpdateTimestampsCache,LIBRARY]
2011-03-03 17:19:14,575 - Cache miss [org.hibernate.cache.UpdateTimestampsCache,BUNDLE]
2011-03-03 17:19:14,575 - Cache hit [texts,com.com.text.domain.Bundle#1]
2011-03-03 17:19:14,591 - Cache hit [texts,sql: select this_.ID as MESSAGE1_157_2_, this_.VERSION as ..
2011-03-03 17:19:14,606 - Cache miss [org.hibernate.cache.UpdateTimestampsCache,TEXT]
2011-03-03 17:19:14,606 - Cache miss [org.hibernate.cache.UpdateTimestampsCache,BUNDLE]
2011-03-03 17:19:14,606 - Cache miss [org.hibernate.cache.UpdateTimestampsCache,MESSAGE]
2011-03-03 17:19:14,606 - Cache hit [texts,com.com.text.domain.Text#5929]

This is still a mystery to me anyone dares to give it a shot ?