In the var/log directory is the file Indexer-0.log. This file grows quite fast, every 4 seconds it writes the following lines to the file. Maybe the worker process should not write out this information when there is nothing to index?
2009-09-23 12:21:08,020 INFO [ ome.services.util.ServiceHandler] (r_Worker-7) Executor.doWork -- FullTextInde$
2009-09-23 12:21:08,020 INFO [ ome.services.util.ServiceHandler] (r_Worker-7) Args: [null, ome.tools.sprin$
2009-09-23 12:21:08,047 INFO [ ome.security.basic.EventHandler] (r_Worker-7) Auth: user=0,group=0,event=2$
2009-09-23 12:21:08,056 INFO [ ome.services.fulltext.FullTextIndexer] (r_Worker-7) INDEXED 0 objects in 1 batch(es)$
2009-09-23 12:21:08,057 INFO [ org.perf4j.TimingLogger] (r_Worker-7) start[1253733668020] time[37] ta$
2009-09-23 12:21:08,057 INFO [ ome.services.util.ServiceHandler] (r_Worker-7) Rslt: null