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Foglight for DB2 (Cartridge) 5.9.2.1 - User Guide

Introduction to Foglight for DB2 LUW Using Foglight for DB2 LUW Reference
Dashboards and Views Collections and Metrics
CF Locks Collection CF Memory Pools Collection CF Resource Usage Collection Current Agents Details Collection Agents Summary Collection Current Locks Wait Collection Database Bufferpools Summary PS Collection Database Configuration Collection Database Tablespaces Collection Database Tablespaces Summary Collection Database Usability Collection Database Parameters Collection Database Instance Parameters Collection Database Instance Registry Variables Collection Database Tablespaces BP Collection FCM Activity Collection FS DB Storage Collection FS DB Storage Summary Collection FS Instance Storage Collection FS Storage Collection FS Storage Summary Collection General Activity Collection HADR Activity Collection Host Properties Collection OS General Collection Instance Activity Collection Instance General Collection Instance Nodes Collection Instance Usability Collection IO Activity Collection License Details Collection Log Activity Collection Log File Collection Log Message Collection Messages Count Collection Monitor Switches Collection OS DB2 General Process Collection Partition Tablespaces Summary Collection Partition Usability Collection pureScale Alerts Collection Top SQLs Collection Top SQLs Full Text Collection Top SQLs Text Collection Query Agents Details Collection Database Partition Activity Collection DB2 Partition Subcategories Wait Collection History Locks Wait Collection History Locks Summary Collection Instance Memory Collection Instance Memory Pool Collection Instance Memory Summary Collection Instance Memory Total Collection Database Memory Collection Database Memory Pool Collection Database Memory Pool DB Collection Database Memory Summary Collection Database Memory Total Collection Database Buffer Pools Collection Database Tables Collection Database Partition Backup Collection Database Tables Global Collection Database Applications Collection

Instance home page — Memory Drill-down

The Memory view provides metrics on how the databases in the instance use memory.

On the Instance home page, click Memory.

This home page contains the following embedded views:

Primary CF tab (pureScale only)
Backup CF tab (pureScale only)

Shows how the total memory available for the instance is allocated to the database and CF pools.

DB Memory. Displays the total memory allocated to the selected instance and its databases in a stacking area chart. For pureScale environments, also shows primary and backup CF allocations.
Pool Breakdown. Displays the total memory allocated to the selected instance and its databases as a pie chart. For pureScale environments, also shows primary and backup CF allocations.

Shows where the instance gets its memory.

Instance Manager Memory. Displays the total memory available to the instance.
Pool Allocated Size. Displays the pools that contribute to the memory for the instance as a stacking area chart.
Instance Manager Breakdown. Displays the pools that contribute to the memory for the instance as a pie chart.
Pool Name. The name of the memory pool.
Utilization %. The percentage of configured allocated memory that is in use.
Allocation. The average allocated size (in KB) of a memory pool.
Config Size. The internally configured size (in KB) of a memory pool in the DB2 database system.
Alarm. The alarm count and state of the memory pool. Click an alarm count to view information about the alarm on the Outstanding Alarms dialog box. For complete information about alarms in Foglight, see the Foglight User Help.

Shows memory utilization by database.

Databases Memory. Displays the total memory allocated to the databases in the instance as a stacking area chart.
Databases Breakdown. Displays the total memory allocated to the databases in the instance as a pie chart.
Name. The name of the databases in the selected instance.
Utilization %. The percentage of configured allocated memory that is in use.
Allocation. The average allocated size (in KB) of memory allocated to the database.
Config Size. The internally configured size (in KB) of memory allocated to the database.
Alarm. The alarm count and state of the database. Click an alarm count to view information about the alarm on the Outstanding Alarms dialog box. For complete information about alarms in Foglight, see the Foglight User Help.

Displayed for pureScale environments only. Shows how the CF memory is allocated.

Primary CF Memory. Displays the total cluster cache facility (CF) memory available to the instance and a breakdown of how the cache is allocated for locks, GBP, SCA, and other.
CF Pool Allocation Breakdown. Displays a breakdown of how the CF pool is allocated for locks, GBP, SCA, and other as a pie chart.
Pool Name. The name of the buffer pools in the CF component.
Utilization %. The percentage of configured allocated memory that is in use.
Allocation. The average allocated size (in KB) of a buffer pool.
Config Size. The internally configured size (in KB) of a buffer pool in the DB2 database system.
Alarm. The alarm count and state of the buffer pool. Click an alarm count to view information about the alarm on the Outstanding Alarms dialog box. For complete information about alarms in Foglight, see the Foglight User Help.

Displayed for pureScale environments only. Contains the same information as the Primary CF tab, but the monitoring data represents the backup cluster cache facility.

Database home page

The DB2 Database home page provides information on the status of the entire DB2 database, over the course of the selected time range.

How to Get Here

To open the Database home page, from the Databases dashboard, find the database you want to explore and click the instance name (or click and select Overview). The Databases > Overview dashboard opens with a summary of the selected database.

From the Database home page, you can drill down to other pages that display more detailed metrics about the database.

The following summary and drill-downs pages are provided:

Summary

By default, the Summary view is displayed on the Database home page. The Summary contains the following panes:

The Database Overview pane displays metrics that provide an overview of the status of the entire database, over the course of the selected time range. For a partitioned database, this pane also provides a way to examine the balance of certain individual metrics across the members. The pane is at the left of the Database home page.

Availability (%). The availability of the agent’s connection FCM.

 

Response Time (ms). The average response time of a query when the connection is already open, over the course of the selected time range.

 

Avg. Request Time (ms). The average duration for a single database request, over the course of the selected time range. This metric is only available for DB2 v9.7.0.1 and later.

 

Balance Criterion. The level of balance exhibited, for a particular database criterion (for example, workload in terms of the number of connections), over the course of the selected time range. Click the arrow at the right of “Balance Criterion” to choose a different criterion from the list.

 

Workload. The balance of average active agents across the database members. If most of the activity is on one member, for example, the activity is not balanced. If most of the activity is spread equally across the members, it is balanced.

 

Request Time. The balance of requests across the monitored members, or the extent to which the total request time is spread across the members. This metric is only available for DB2 v9.7.0.1 and later.

 

Physical Reads. The balance of the physical reads across the monitored members, or the extent to which the physical reads operations are balanced across the members.

 

Logical Reads. The balance of the logical reads across the monitored members, or the extent to which the logical reads operations are balanced across the members.

 

CPU Load. The balance of CPU used across the monitored members.

 

Transaction Rate. The balance of the transactions across the monitored members. For example, if most of the transactions are done on one member, the transactions are not balanced. If they are spread equally across the members, they are balanced.

 

Storage Capacity. The balance of storage capacity used across the monitored members.

Clicking the icon next to the Availability, Response Time, or Avg. Request Time metric displays a pop-up that provides additional, related information.

Mousing over a data point on either of the Balance Criterion charts displays a pop-up that provides more detailed information about that data point.

Clicking any of the Request Time, Physical Reads, Logical Reads, CPU Load, Transaction Rate, or Storage Capacity charts displays a pop-up that provides additional, related information.

The Sessions pane displays client application session metrics for the entire database. It is at the lower left of the Database home page.

Avg. Active Sessions (no.). The average number of active sessions connected to the database over the course of the selected time range.

 

Avg. Connected Sessions (no.). The average number of sessions connected to the database over the course of the selected time range.

Clicking the icon next to either of the metrics displays a pop-up that provides additional, related information.

The FCM pane displays FCM metrics for the entire database. It is located in the upper middle of the Database home page.

Total Buffers Sent. The total number of FCM buffer pages sent from the current node to the remote node, over the course of the selected time range.

 

Total Buffers Received. The total number of FCM buffer pages received by the current node from the remote node, over the course of the selected time range.

Clicking the icon next to either of the metrics displays a pop-up that provides additional, related information.

The Cache Hit Ratio pane displays cache hit ratio metrics for the entire database. It is located toward the center of the Database home page.

 

Buffer Pool (%). The percentage of database page I/O requests satisfied using the buffer cache (and therefore the database did not have to perform disk reads), over the course of the selected time range.

 

Package (%). The number of times that a requested section was not available for use and had to be loaded into the package cache. Calculated as a percentage of the total number of times that a section was requested, over the course of the selected time range.

 

Catalog (%). The number of times that a table descriptor or authorization information was not found in the catalog cache and had to be inserted ther. Calculated as a percentage of the total number of times that a table descriptor or authorization information was requested, over the course of the selected time range.
pureScale onlyOverall BP (%). A percentage that reflects the number of times a requested page was found in the buffer pool out of all times it was requested. If a page is found in the buffer pool, it saves the database the time to look for it in the physical storage.
pureScale onlyGlobal BP (%). A percentage that reflects the number of times a requested page was found in the GBP out of all times it was requested. If a page is found in the GBP, it saves the database the time to look for it in the LBP.
pureScale onlyGBP Full (%). A percentage that reflects the number of times a Group Buffer Pool Full condition occurred per 10,000 commits.

The Resource Utilization pane provides information on CPU and RAM consumption for the entire database. It is located in the lower middle of the Database home page.

 

CPU (%). Total CPU usage by all processes (including all DB2 processes) running on the host, as a percentage of the total CPU available.

 

No. of CPUs. The total number of CPUs available.

 

Memory (%). Total memory usage by all processes (including all DB2 processes) running on the host, as a percentage of the total memory available.

 

Total RAM. The total RAM (in MB) available.

Mousing over a data point on either of the CPU or Memory charts displays a pop-up that provides more detailed information about the data point.

Clicking a data point on either of the CPU or Memory charts displays a pop-up that provides additional, related information.

The Storage pane provides information about fixed and auto storage for the entire database. It is at the upper right of the Database home page.

Fixed Size (MB). The total disk space that is available for use by fixed-size tablespaces and the disk space that is still free to be used by fixed-size tablespaces.

 

Auto Storage (MB). The total file system space that is available for the database to use to carry out auto storage tablespace operations, and the file system space that is still free for the database to use to carry out auto storage tablespace operations.
Clicking the Investigate using the “Tablespaces” drilldown link at the bottom of either pop-up takes you to the Tablespaces dashboard for additional information.

The Average I/O Activity pane provides I/O metrics for the entire database. It is at the lower right of the Database home page.

Log Reads. The number of times the log was read from during the selected time range.

 

Log Writes. The number of times the log was written to during the selected time range.

 

Physical Reads. The number of reads directly from disk during the selected time range.

 

Physical Writes. The number of writes directly to disk during the selected time range.

 

Logical Reads. The number of reads from the buffer pool during the selected time range.

 

Direct Reads. The number of reads that did not use the buffer pool, during the selected time range.

 

Direct Writes. The number of writes that did not use the buffer pool, during the selected time range.

 

Async Reads. The number of asynchronous reads during the selected time range.

 

Async Writes. The number of asynchronous writes during the selected time range.

Clicking the icon next to any of the metrics displays a pop-up that provides additional, related information.

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