Oracle Coherence Monitor User Guide

Oracle Coherence Monitor

User Guide

Using the Monitor - Cache Services
Cache Services displays present detailed service performance metrics for the cluster. Use the Cache Services displays to quickly identify overloaded services and locate the client connection causing the issue.

These displays show metrics for all cache services, including: CPU%, Requests, Request Average Duration, Request Pending Count, Task Backlog and Active Threads.

Single Service Summary
Trend graphs show performance metrics for a single service aggregated across all nodes.
Service Metrics Overview
Heatmap shows overview of the current behavior of the cluster, displaying metrics across nodes in the cluster for a selected service or for all services. Enables you to determine if the behavior of the cluster is balanced across all nodes or identify if some nodes are hot spots.
Service Metric Heatmap
Heatmap shows current value of a selected metric, selected by service, across the cluster. Enables you to determine if the behavior of the cluster, for the selected metric, is balanced or identify if some nodes are hot spots.
Single Service History
Use this display to perform low-level analysis of service capacity utilization, over time, per node. Heatmap enables you to view the impact of events across the cluster as well as the relative historical performance of nodes across the cluster.
Cache Service Detail
Table view of attributes of a selected service for a selected host for nodes. Attribute values can be ordered to identify the nodes with the highest and lowest values of interest.

NOTE: Click the button to view the current display in a new window.

Single Service Summary
This display shows performance metrics for a single service aggregated across all nodes.

Cluster	Select a cluster from the drop-down menu.

Service	Select a service to display.
Storage Nodes	Select to display storage node data in the trend graphs of this display.
Process Nodes	Select to display process node data in the trend graphs of this display.
Caches	The number of caches managed by the service.

Type	The type of cache.
Storage Nodes	The number of storage nodes in the cache.
Process Nodes	The number of process nodes in the cache.
Status	The high availability status for the service.
	MACHINE-SAFE	If a machine for the service goes offline the data stored on the machine remains available in the cluster (no data loss).
	NODE-SAFE		If a node for the service goes offline (or is taken offline using kill-9) data stored on the node remains available in the cluster (no data loss).
	ENDANGERED		If a node for the service goes offline the data stored on the node is potentially unavailable in the cluster (potential data loss).

Requests	Requests executed by the service.
	Total			The number of requests executed.
	Current			The number of requests currently being processed.
	Pending			The number of pending requests.
Messages	Messages executed by the service.
	Total			The number of messages executed.
	Current			The number of messages currently being processed.
	Req Avg Duration			The average amount of time to process messages.
Tasks	Tasks performed by the service.
	Count			The number of tasks performed.
	Backlog			The number of tasks scheduled to be executed by one of the service threads.
	Queue			The Write Back Queue total across all caches on the service.
Threads	Threads on the service.
	Count			The number of threads on the service.
	Active			The number of threads in the service not currently idle.
	Avg CPU %			The average amount of CPU usage (%) for the service.

Storage / Process Node Totals	The trend graphs show aggregated performance metrics for storage or process nodes. Choose Storage Nodes or Process Nodes at the top of this display.
	Log Scale			Enable to use a logarithmic scale for the Y axis. Use Log Scale to see usage correlations for data with a wide range of values. For example, if a minority of your data is on a scale of tens, and a majority of your data is on a scale of thousands, the minority of your data is typically not visible in non-log scale graphs. Log Scale makes data on both scales visible by applying logarithmic values rather than actual values to the data.
	Base at Zero			Use zero for the Y axis minimum for all graphs.
	Time Range			Select a time range or All Data from the drop-down menu. By default, the ending period for displayed data is the current time. To specify a time range: 1. Click the button to open the calendar dialog. By default, the time range end point is the current time. 2. Change the time range end point by clicking the button and selecting the date and time, then click OK. Or enter the date and time in the text field using the following format: MMM dd, YYYY HH:MM:ss. For example, Apr 26, 2012 5:01 PM. 3. Click Apply. The navigation arrows appear. 4. Use the navigation arrows to move forward or backward one time period (the time period selected from the Time Range drop-down menu). Click Restore to Now to reset the time range end point to the current time.

Service Metrics Overview
Heatmap of Process (non-storage enabled) Nodes and Storage (enabled) Nodes. Size = One Node. Color = Relative Value of Selected Metric.

Cluster	Select a cluster from the drop-down menu.

Service	Select a service to display.
Node Labels	Select to display node labels.

Process Nodes	Color of the cells represents the relative value of the selected Metric; a darker shade is a larger value. The size of all cells is identical as they each represent one process node.	Metric	CPU%	Percent of CPU utilization on the given node.
			Requests	Number of requests issued by the service in the measured period.
			Messages	The number of messages for the given node in the measured interval.
			Request Average Duration	Average duration (in milliseconds) of an individual request issued by the service since the last time the statistics were reset.
Storage Nodes	Color of the cells represents the relative value of the selected Metric; a darker shade is a larger value. The size of all cells is identical as they each represent one storage node.		Request Pending Count	Number of pending requests issued by the service.
			Task Backlog	Size of the backlog queue that holds tasks scheduled to be executed by one of the service threads.
			Active Threads	Number of threads in the service thread pool, not currently idle.

Service Metric Heatmap
Heatmap of Process (non-storage enabled) Nodes and Storage (enabled) Nodes. Size = Number of Caches in Selected Service, Color = Relative Value of Selected Metric.

Cluster	Select a cluster from the drop-down menu.

Service	Select a service to display.
Metric	CPU%	Percent of CPU utilization on the given node.
	Requests	Number of requests issued by the service in the measured period.
	Request Average Duration	Average duration (in milliseconds) of an individual request issued by the service since the last time the statistics were reset.
	Request Pending Count	Number of pending requests issued by the service.
	Task Backlog	Size of the backlog queue that holds tasks scheduled to be executed by one of the service threads.
	Active Threads	Number of threads in the service thread pool, not currently idle.
Node Labels	Select to view node locations.

Process Nodes: Heatmap of Service Metric	Color of the cells represents the relative value of the selected Metric for a given process node; a darker shade is a larger value. Size of the cells is based the number of caches in the selected Service for that process node.
Storage Nodes: Heatmap of Service Metric	Color of the cells represents the relative value of the selected Metric for a given storage node; a darker shade is a larger value. Size of the cells is based on the number of caches in the selected Service for that storage node.

Single Service History
Use this display to perform low-level analysis, node-by-node, of service capacity utilization. Heatmap of Process (non storage enabled) Nodes and Storage (enabled) Nodes. Color = Relative Value of Selected Metric.

Cluster	Select a cluster from the drop-down menu.
All	Click to view the All Services History display.

Service	Select a service to display.
Metric	CPU%	CPU Utilization (as a %) on the given node.
	Requests	Number of requests issued by the service in the measured period.
	Request Average Duration	Average duration (in milliseconds) of an individual request issued by the service since the last time the statistics were reset.
	Request Pending Count	Number of pending requests issued by the service.
	Task Backlog	Size of the backlog queue that holds tasks scheduled to be executed by one of the service threads.
	Active Threads	Number of threads in the service thread pool, not currently idle.
Range	Select a time range or All Data from the drop-down menu. By default, the ending period for displayed data is the current time. To specify a time range: 1. Click the button to open the calendar dialog. By default, the time range end point is the current time. 2. Change the time range end point by clicking the button and selecting the date and time, then click OK. Or enter the date and time in the text field using the following format: MMM dd, YYYY HH:MM:ss. For example, Apr 26, 2012 5:01 PM. 3. Click Apply. The navigation arrows appear. 4. Use the navigation arrows to move forward or backward one time period (the time period selected from the Time Range drop-down menu). Click Restore to Now to reset the time range end point to the current time.

Process Nodes: History Heatmap of Service Metric	Color of the cells represents the relative value of the selected Metric for a given process node; a darker shade is a larger value. The value of the Metric is displayed over the specified History for all process nodes in the selected Service.
Storage Nodes: History Heatmap of Service Metric	Color of the cells represents the relative value of the selected Metric for a given storage node; a darker shade is a larger value. The value of the Metric is displayed over the specified History for all storage nodes in the selected Service.

Cache Service Detail

This display provides a table view of attributes of a selected service for a selected host for nodes. Attribute values can be ordered to identify the nodes with the highest and lowest values of interest.

Cluster	Select a cluster from the drop-down menu.
Summary	Click to view the Single Service - Summary display.

Service	Select a service to display.
Host	Select a host.
Class	Select the type of node to display: All, Storage or Process nodes.

Cache Service Detail by Node	The columns in this table, with the exception of Location, come from Service and Node MBeans. For details on attributes of these MBeans go to: http://download.oracle.com/otn_hosted_doc/coherence/350/com/tangosol/net/management/Registry.html.	Location	A unique identifier for each node. It is defined as member_name.machine.rack.site.

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