change history_audit_table_prune_interval to 2h

and observe if we now see the spikes every 2h instead of every 1h

group_vars/gxconfig.yml

@@ -131,7 +131,7 @@ base_app_main: &BASE_APP_MAIN
 
   # Time (in seconds) between attempts to remove old rows from the
   # history_audit database table. Set to 0 to disable pruning.
-  #history_audit_table_prune_interval: 3600
+  history_audit_table_prune_interval: 7200
 
   # Where dataset files are stored. It must be accessible at the same
   # path on any cluster nodes that will run Galaxy jobs, unless using