r5 - 2013-08-06 - 22:30:58 - GeraldMitchellYou are here: TWiki >  Deployment Web > DeploymentMonitoring > CLMServerMonitoring > CLMServerMonitoringDataDictionary > CLMServerMonitoringJenaMonitor

CLM Server Monitoring - Jena Monitor

Authors: JorgeAlbertoDiaz
Build basis: Collaborative Lifecycle Management 4.0.4

The Jena Monitor is responsible for gathering performance information of SPARQL queries, and monitoring whether a particular query exceeds the defined threshold.

JMX Interface Name: com.ibm.team.server.monitoring.management.MonitorRollupMBean
JMX Object Name: team.server.<application public URI context>@<port>:type=SPARQL
JMX Object Name Example: team.server./jts@9443:type=SPARQL

A JMX object of this "type" will be created for each monitored SPARQL query:

  • Jena Monitor JMX Object Name: team.server.<application public URI context>@<port>:type=SPARQL
  • Jena JMX Object Name: team.server.<application public URI context>@<port>:type=SPARQL,name="<Query>"

The Jena Monitor performance metrics information are rolled up from the performance information from all the individual monitored queries. Visually, the Jena Monitor objects structure is like the following:

   team.server./<URL>@<port>:type=SPARQL
          |
          |
          |---- team.server./<URL>@<port>:type=SPARQL,name="<Query>"
          |---- team.server./<URL>@<port>:type=SPARQL,name="<Query2>"
                                ...    
   

Monitor Attributes

Following are the attributes exposed by the Jena Monitor

JMX Attribute JMX Type Is Writeable? Default Value Description
AverageResponseTime long No 0 Average response time from all the monitored queries
Count long No 0 Counter of all monitored operations
Duration long No 0 Total duration of monitored queries processing
Enabled boolean Yes false Whether this monitor is enabled. Default is disabled so no performance monitoring of Jena queries is performed
MaximumResponseTime long No 0 Maximum response time of a query processing from all the monitored ones
MinimumResponseTime long No 0 Minimum response time of a query processing from all the monitored ones
Threshold java.lang.Long Yes 10000 Defines the maximum allowed time for a query to be processed. If this time is exceeded a problem will be generated
TimeSinceLastReset long No 0 Total time since the last statistics reset

Note the attributes related with time statistics are expressed in miliseconds

Monitor Operations

JMX Operation Signature Return Type Description
dismissAllProblems() void When called, all the problems tracked by this monitor are dismissed
reset() void When called, resets the statistics of the monitor

Child MBeans

This section gathers information regarding MBeans that are contained within this monitor

Jena Query objects

An instance of a monitored query. A JMX object is created for each query, identified by the query it monitors. The JMX object will monitor and gather performance information of all the executions of this SPARQL query. When a query processing has finished it will record the duration and rollup metrics.

JMX Interface Name: com.ibm.team.server.monitoring.jmx.beans.JenaQueryMBean
JMX Object Name: team.server.<application public URI context>@<port>:type=SPARQL,name="<Query>"
JMX Object Name Example: team.server./ccm@9443:type=SPARQL,name="SELECT \?s\nWHERE\n { \?s \?p \?o }\nLIMIT 1\n"

Attributes

JMX Attribute JMX Type Is Writeable? Default Value Description
AverageResponseTime long No 0 Average response time of all the query executions
Count long No 0 Counter of all monitored operations
Duration long No 0 Total processing duration of the query
MaximumResponseTime long No 0 Maximum response time it took to process the query
MinimumResponseTime long No 0 Minimum response time it took to process the query
TimeSinceLastReset long No 0 Total time since the last statistics reset

Note the attributes related with time statistics are expressed in miliseconds

Operations

JMX Operation Signature Return Type Description
reset() void When called, resets the statistics of this monitored query


Jena Problems

When the execution of a SPARQL query exceeds the threshold defined in the Jena Monitor, a Problem SPARQL object is created. This object provides information that uniquely identifies the SPARQL query execution that exceeded the threshold. The generated JMX object follows the convention:

JMX Interface Name: com.ibm.team.server.monitoring.jmx.beans.ResourceInstanceMBean
JMX Object Name: team.server.<application public URI context>@<port>:type=Problem SPARQL,name="<SPARQLQuery>",id=ID
JMX Object Name Example: team.server./ccm@9443:type=Problem SPARQL,name="PREFIX jf: <http://jazz.net/xmlns/foundation/1.0/>\nPREFIX dc: <http://purl.org/dc/terms/>\n\nSELECT \?url \?title \?context\nWHERE\n { \?url dc:type \"com.ibm.team.dashboard\" .\n \?url dc:relation <https://sp013146.ibm.com:9443/jts/users/gica> .\n \?url jf:resourceContext \?context .\n \?url dc:title \?title\n }\n",id=3441368c-9d39-4a2e-824f-0523d1a9f71c

Where name matches the one of the SPARQL Query monitor object of which a execution originated this problem. A different problem object instance (with different ID) will be created each time the execution of the query exceeds the defined threshold.

Attributes

Following are the attributes exposed by the Problem SPARQL objects

JMX Attribute JMX Type Is Writeable? Default Value Description
Duration long No 0 Total duration of the operation. This value will be greater than the defined threshold
FinishDate Date No Finish Date/time Date/time the operation finished
Identifier String No UUID Object UUID
Links TabularType (Open Type) No   Links to associated performance information. This attribute is not currently used in this release
Name String No Object name The query. It matches the value of the name entry of the JMX Object name
RDF String No   RDF Representation of this object. This attribute is not currently used in this release
StartDate Date No Start Date/time Date/time at which the operation started
ThreadID long No   The ID of the thread that executed the operation
ThreadName String No   Name of the thread which activity resulted in the SPARQL query execution. It provides context information of the root operation
ThreadTraceRDF String No   The trace of other monitored object invocations along with their associated metrics as RDF. This attribute is not currently used in this release
URI String No   This attribute is not currently used in this release

Operations

JMX Operation Signature Return Type Description
dismiss() void When called, removes the problem instance


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Additional contributors: TWikiUser, TWikiUser

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Deployment.CLMServerMonitoringJenaMonitor moved from Deployment.SmarterServerJenaMonitor on 2013-08-06 - 22:30 by GeraldMitchell -
 
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