[oslc-Metrics] new Metric and UnitOfMeasure subclasses

[Julianne Bielski]

OSLC EMS workgroup members,

The Performance Monitoring domain specification members would like to 
propose the set of metrics and units below to be added to the ems spec. 
Could you please review and respond with any questions and hopefully 
agreement by 9/24?

Performance Monitoring Metrics
Performance Monitoring metrics are metrics that can be measured on a 
resource and give an indication of the performance, availability,
utilization, or capacity. The Performance Monitoring metric classes are 
subclasses of ems:Metric.
Table of Performance Metric Standard URIs

URI
Description
http://open-services.net/ns/ems/metric#FreeMegabytes
Number of megabytes free on a logical disk.
http://open-services.net/ns/ems/metric#VirtualMemoryUtilization
Percentage of virtual memory in use by a computer system or process as a 
percentage of all available virtual memory.
http://open-services.net/ns/ems/metric#RealMemoryUtilization
Percentage of real memory in use by a computer system or process as a 
percentage of all available real memory.
http://open-services.net/ns/ems/metric#CPUUtilization
Percentage of CPU time used by a computer system or process as a 
percentage of total available CPU time.
http://open-services.net/ns/ems/metric#ResponseTime
Time it takes for a response to be returned to a request
http://open-services.net/ns/ems/metric#NumFailedSqlStmts
The number of failed SQL statements returned from a database to a client
http://open-services.net/ns/ems/metric#HeapUsage
The amount of memory heap used by an application
http://open-services.net/ns/ems/metric#TableReorgNeeded
Indicates whether a database’s tables need to be reorganized
http://open-services.net/ns/ems/metric#PctBufferPoolUsed
Percentage of buffer pool used by a database server
http://open-services.net/ns/ems/metric#GarbageCollectionCount
The number of times GC has been run during the lifetime of an application
http://open-services.net/ns/ems/metric#PercentageFreeMemoryAfterGC
Percentage of free memory on application JVM’s heap following a garbage 
collection. Indicator of memory leak or misconfiguration.
http://open-services.net/ns/ems/metric#PercentageTimeThreadPoolMaxed
Represents the proportion of time an application’s thread pool has been 
totally consumed since application start time. Indicator of thread pool 
contention and slowing response times
http://open-services.net/ns/ems/metric#PercentageTimeJCAThreadPoolMaxed
Represents the proportion of time a JCA application’s thread pool has been 
totally consumed since application start time. Indicator of thread pool 
contention and slowing response times
http://open-services.net/ns/ems/metric#PercentageTimeDBThreadPoolMaxed
Represents the proportion of time a database application’s thread pool has 
been totally consumed since application start time. Indicator of thread 
pool contention and slowing response times
http://open-services.net/ns/ems/metric#VMCPUPercentReady
The amount of time a Virtual Machine’s CPU has spent in the ready state. A 
relatively high number indicates under utilization
http://open-services.net/ns/ems/metric#TotalCPUAvailable
The amount of MHz available to a physical server
http://open-services.net/ns/ems/metric#OverCommmittedDiskUtilization
The percentage of the total capacity of a storage volume that has been 
overcommitted.

Performance Monitoring Metrics Units of Measure
The Performance Monitoring metric units of measure are a subclass of 
ems:UnitOfMeasure.
Table of ems:Unit of Measure Standard URIs for Performance Metrics
URI
Description
http://open-services.net/ns/ems/unit#Percentage
dbpedia:Percentage
http://open-services.net/ns/ems/unit#Megabytes
qudt:Capacity
http://open-services.net/ns/ems/unit#MegaHertz
qudt:MegaHertz



-- Regards,

Julianne Bielski, STSM
ITM Core Chief Architect
Tivoli, IBM Software Group
tel: (919) 224-1170      (T/L) 687-1170
e-mail: bielsk at us.ibm.com

"All growth is a leap in the dark, a spontaneous unpremeditated act 
without benefit of experience." — Henry Miller
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