: I'm trying to monitor some Solr behaviour, using JMX. : It looks like a great job was done there, but I can't find any : documentation on the MBeans themselves.
In general, the stats exposed by the various MBeans are going to largely depend on the underlying plugin classes -- in most cases they are hopefully self explaining, but in cases where they aren't, your best bet is to skim the code. : For example, DirectUpdateHandler2 attributes. What is the difference : between "adds" and "cumulative_adds"? Is "adds" count the last X seconds : only? or maybe "cumulative_adds" survives a core reload? as mark mentioned, i don't think any stats survive a core reload, because almost everything implementing MBean is created/destroyed along with the core. In the specific case of DirectUpdateHandler2, the "cumulative_* stats refer to the total number for hte life of the DUH2 instance, which the non cumlative stats are reset on commit. -Hoss
