Collectd

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What is collectd ?

Collectd is a daemon which collects system performance statistics periodically and provides mechanisms to store the values in a variety of ways, for example in RRD files. Website

Collectd config for OpenSim

As stated here : Monitoring Module, we can get region statistics using the url : http://sim:port/monitorstats/UUID of the region or region name. We can use the collectd curl_xml plugin to get xml values and store them in a rrd file. To do this, we need to enable the curl_xml plugin and define some dataset types.

Add data types

  • Create a file /etc/collectd/my_types.db
  • Edit the file and add inside (i have put only generic limits but feel free to edit this page and adjust the ranges) : 
opensim_agent_count	value:GAUGE:0:U
opensim_child_agent_count	value:GAUGE:0:U
opensim_gc_memory	value:GAUGE:0:U
opensim_object_count	value:GAUGE:0:U
opensim_physics_frame	value:GAUGE:0:U
opensim_physics_update	value:GAUGE:0:U
opensim_pws_memory	value:GAUGE:0:U
opensim_thread_count	value:GAUGE:0:U
opensim_total_frame	value:GAUGE:0:U
opensim_event_frame	value:GAUGE:0:U
opensim_land_frame	value:GAUGE:0:U
opensim_last_frame	value:GAUGE:0:U
opensim_time_dilatation	value:GAUGE:0:U
opensim_sim_fps	value:GAUGE:0:U
opensim_physics_fps	value:GAUGE:0:U
opensim_agent_updates_per_sercond	value:GAUGE:0:U
opensim_object_updates_per_second	value:GAUGE:0:U
opensim_active_object_count	value:GAUGE:0:U
opensim_active_scripts	value:GAUGE:0:U
opensim_script_events_per_second	value:GAUGE:0:U
opensim_in_paquets_per_second	value:GAUGE:0:U
opensim_out_paquets_per_second	value:GAUGE:0:U
opensim_unacked_bytes	value:GAUGE:0:U
opensim_pending_downloads	value:GAUGE:0:U
opensim_pending_uploads	value:GAUGE:0:U
opensim_total_frame_time	value:GAUGE:0:U
opensim_net_frame_time	value:GAUGE:0:U
opensim_physics_frame_time	value:GAUGE:0:U
opensim_simulation_frame_time	value:GAUGE:0:U
opensim_agent_frame_time	value:GAUGE:0:U
opensim_images_frame_time	value:GAUGE:0:U
  • Edit the file /etc/collectd/collectd.conf :
Uncomment this line 
TypesDB "/usr/share/collectd/types.db" "/etc/collectd/my_types.db"

Add plugin options

  • Edit the file /etc/collectd/collectd.conf :
Add these lines 
LoadPlugin curl_xml
<Plugin "curl_xml">
  <URL "http://localhost:9000/monitorstats/myregion">
    Instance "opensim"
 
    <XPath "/data">
      Type "opensim_agent_count"
      ValuesFrom "AgentCountMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_child_agent_count"
      ValuesFrom "ChildAgentCountMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_gc_memory"
      ValuesFrom "GCMemoryMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_object_count"
      ValuesFrom "ObjectCountMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_physics_frame"
      ValuesFrom "PhysicsFrameMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_physics_update"
      ValuesFrom "PhysicsUpdateFrameMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_pws_memory"
      ValuesFrom "PWSMemoryMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_thread_count"
      ValuesFrom "ThreadCountMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_total_frame"
      ValuesFrom "TotalFrameMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_event_frame"
      ValuesFrom "EventFrameMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_land_frame"
      ValuesFrom "LandFrameMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_last_frame"
      ValuesFrom "LastFrameTimeMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_time_dilatation"
      ValuesFrom "TimeDilationMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_sim_fps"
      ValuesFrom "SimFPSMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_physics_fps"
      ValuesFrom "PhysicsFPSMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_agent_updates_per_sercond"
      ValuesFrom "AgentUpdatesPerSecondMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_object_updates_per_second"
      ValuesFrom "ObjectUpdatesPerSecondMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_active_object_count"
      ValuesFrom "ActiveObjectCountMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_active_scripts"
      ValuesFrom "ActiveScriptsMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_script_events_per_second"
      ValuesFrom "ScriptEventsPerSecondMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_in_paquets_per_second"
      ValuesFrom "InPacketsPerSecondMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_out_paquets_per_second"
      ValuesFrom "OutPacketsPerSecondMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_unacked_bytes"
      ValuesFrom "UnackedBytesMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_pending_downloads"
      ValuesFrom "PendingDownloadsMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_pending_uploads"
      ValuesFrom "PendingUploadsMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_total_frame_time"
      ValuesFrom "TotalFrameTimeMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_net_frame_time"
      ValuesFrom "NetFrameTimeMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_physics_frame_time"
      ValuesFrom "PhysicsFrameTimeMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_simulation_frame_time"
      ValuesFrom "SimulationFrameTimeMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_agent_frame_time"
      ValuesFrom "AgentFrameTimeMonitor/text()"
    </XPath>
 
    <XPath "/data">
      Type "opensim_images_frame_time"
      ValuesFrom "ImagesFrameTimeMonitor/text()"
    </XPath>
 
  </URL>
</Plugin>
  • Save the file and restart collectd

Example output :

Example output

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