UpdateTimestampsCache « Cache « JPA Q&A





1. org.hibernate.cache.UpdateTimestampsCache never returns    forum.hibernate.org

I use Grails' GORM for datastore (underlining db is HSQLDB). When I have a multi-thread program that writes object to db (not same row, but same table), sometimes, a few threads will never return. The last log entries for that thread show the following: 2009-10-22 10:54:09,406 [17502052@qtp1-0] DEBUG algorithm.AbstractConcurrentReadCache - get called (key=gr_lic_line.org.hibernate.cache.UpdateTimestampsCache) 2009-10-22 10:54:09,406 [17502052@qtp1-0] DEBUG algorithm.AbstractConcurrentReadCache - persistStore called ...

2. Cache related multithread bottleneck (UpdateTimestampsCache)    forum.hibernate.org

Page 1 of 1 [ 1 post ] Previous topic | Next topic Author Message Mirek B Post subject: Cache related multithread bottleneck (UpdateTimestampsCache) Posted: Wed Sep 08, 2010 7:45 am Newbie Joined: Wed Sep 08, 2010 7:19 am Posts: 1 Hi, we are experiencing performance problems on production servers, which ...

3. Cache miss on org.hibernate.cache.UpdateTimestampsCache    forum.hibernate.org

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 ...

4. Cause Cache dirty, Why changed the UpdateTimestampsCache?    forum.hibernate.org

I don't know who change the following code in UpdateTimestampsCache.java. but this change was wrong! The commented code was right. they aren't equivalent. Code: return lastUpdate.longValue() < timestamp.longValue(); // if ( lastUpdate.longValue() >= timestamp.longValue() ) return false; Code: ...

5. org.hibernate.cache.UpdateTimestampsCache.preinvalidate    forum.hibernate.org

Hi guys We are trying to use terracotta as second level cache for hibernate and while testing for performance in a case in which we are constantly reading and writing to a db i see a bottleneck. I constantly see a thread acquiring the a lock shown in the thread dump below whenever there is an update operation due to which ...