SAK-44851 - Make hibernate generate_statistics configurable and false…

… by default (sakaiproject#8928)

config/configuration/bundles/src/bundle/org/sakaiproject/config/bundle/default.sakai.properties

@@ -403,6 +403,15 @@
 # DEFAULT: false
 # hibernate.show_sql=false
 
+# Enable hibernate to generate metric statistics
+# DEFAULT: false
+# hibernate.generate_statistics=true
+
+# If you set this above setting to true, you'll probably want to log the summary stats generated by using this property (or incrementing your log.config.count and adding this new one on there)
+# You may also want to log execution time for each query this is enabled in DEBUG.org.hibernate.stat
+# log.config.count = 1
+# log.config.1 = INFO.org.hibernate.engine.internal.StatisticalLoggingSessionEventListener
+
 # The database username and password. The defaults are for the out-of-the-box HSQLDB.  
 # Change to match your setup. Do NOT enable access to your database without a password.
 # Defaults: HSQLDB default user: "sa"/""

kernel/component-manager/src/main/bundle/org/sakaiproject/config/kernel.properties

@@ -57,9 +57,12 @@ bottom.copyrighttext=Copyright 2003-currentYearFromServer The Apereo Foundation.
 # Default is to create needed schema
 auto.ddl=true
 
-# Enable hibernate SQL debugging output in the logs.
+# Disable hibernate SQL debugging output in the logs by default
 hibernate.show_sql=false
 
+# Disable hibernate generating statistics by default
+hibernate.generate_statistics=false
+
 ## DB DEFAULTS
 [email protected]=sa
 [email protected]=

kernel/kernel-impl/src/main/webapp/WEB-INF/db-components.xml

@@ -450,7 +450,7 @@
 				<prop key="hibernate.cache.use_query_cache">true</prop>
 				<prop key="hibernate.use_second_level_cache">true</prop>
 				<prop key="hibernate.cache.region.factory_class">org.apache.ignite.cache.hibernate.HibernateRegionFactory</prop>
-				<prop key="hibernate.generate_statistics">true</prop>
+				<prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</prop>
 				<prop key="hibernate.enable_lazy_load_no_trans">true</prop>
 				<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate5.SpringSessionContext</prop>
 				<prop key="org.apache.ignite.hibernate.default_access_type">READ_ONLY</prop>