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Foglight for DB2 (Cartridge) 5.9.4.20 - 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 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

Database Parameters Collection

The following table describes the metrics that are collected for each database configuration parameter.

 
Metric
Description

DATABASE_NAME

The name of the monitored database.

NAME

The configuration parameter name.

CURRENT_VALUE

The current value of the configuration parameter stored in memory, in partition/member 0.

VALUE_FLAGS

Provides information about the current value of the configuration parameter. Values:

NONE — No additional information

AUTOMATIC — The configuration parameter has been set to automatic

DEFERRED_VALUE

The value of the configuration parameter on disk. For some database configuration parameters, changes only take effect when the database is reactivated. In such cases, all applications must first disconnect from the database. (If the database was enabled, then it must be deactivated and then reactivated.) The changes take effect with the next connection to the database.

DATATYPE

The configuration parameter data type.

MODIFIED

Indicates whether the value changed since the last collection.

If the value changed on disk, but the instance is still using the previous value, the value of this parameter is 0.

Database Instance Parameters Collection

The following table describes the metrics that are collected for each database instance configuration parameter.

 
Metric
Description

INSTANCE_NAME

The database instance name.

NAME

The configuration parameter name.

CURRENT_VALUE

The current value of the configuration parameter stored in memory, in partition/member 0.

VALUE_FLAGS

Provides specific information about the current value of the configuration parameter. Values:

NONE — No additional information

AUTOMATIC — The configuration parameter has been set to automatic

DEFERRED_VALUE

The value of the configuration parameter on disk. For some database configuration parameters, changes only take effect when the database is reactivated. In such cases, all applications must first disconnect from the database. (If the database was enabled, then it must be deactivated and then reactivated.) The changes take effect with the next connection to the database.

DATATYPE

The configuration parameter data type.

MODIFIED

Indicates whether the value changed since last collection.

If the value changed on disk, but the instance is still using the previous value, the value of this parameter is 0.

Database Instance Registry Variables Collection

The following table describes the metrics that are collected for each database instance registry variable.

 
Metric
Description

INSTANCE_NAME

The name of the monitored instance.

REG_VAR_NAME

The name of the DB2 registry variable.

REG_VAR_VALUE

The current value of the DB2 registry variable in memory.

REG_VAR_ON_DISK_VALUE

The current setting of the DB2 registry variable on disk. For DB2 versions prior to version 10, the current setting is not available, so the value of this parameter is “N/A”.

LEVEL

Indicates the level at which the DB2 registry variable acquires its value. The possible return values and the corresponding levels that they represent are:

I — Instance

G — Global

N — Database partition

E — Environment

MODIFIED

Indicates whether the value changed since last collection.

If the value changed on disk, but the instance is still using the previous value, the value of this parameter is 0.

Database Tablespaces BP Collection

The following table provides a list of the Database Tablespaces BP metrics that are collected, and a description for each.

 
Metric
Description

DB_NAME

The name of the monitored database.

TBSP_NAME

The tablespace name.

DBPARTITIONNUM

The database partition from which the data was retrieved for this row.

TABLESPACE_TYPE

This interface returns a text identifier, based on the definitions in sqlutil.h, which is one of the following values:

DMS

SMS

TABLESPACE_ID

The tablespace ID.

POOL_ASYNC_DATA_READS

The number of data pages read in from the tablespace containers (physical) by asynchronous engine dispatchable units (EDUs) for all types of tablespaces.

POOL_ASYNC_DATA_WRITES

The number of times a buffer pool data page was physically written to disk by either an asynchronous page cleaner or a prefetcher. A prefetcher may have written dirty pages to disk to make space for the pages being prefetched.

POOL_ASYNC_INDEX_READS

The number of index pages read in from the tablespace containers (physical) by asynchronous engine dispatchable units (EDUs) for all types of tablespaces.

POOL_ASYNC_INDEX_WRITES

The number of times a buffer pool index page was physically written to disk by either an asynchronous page cleaner or a prefetcher. A prefetcher may have written dirty pages to disk to make space for the pages being prefetched.

POOL_ASYNC_DATA_READ_REQS

The number of read requests made by the prefetcher to the operating system. These requests are typically large block IOs of multiple pages.

POOL_ASYNC_READ_TIME

The total amount of time spent reading in data and index pages from the tablespace containers (physical) by asynchronous engine dispatchable units (EDUs) for all types of tablespaces. This value is given in milliseconds.

POOL_ASYNC_WRITE_TIME

The total elapsed time spent writing data or index pages from the buffer pool to disk by database manager page cleaners.

POOL_DATA_L_READS

The number of data pages that have been requested from the buffer pool (logical) for regular and large tablespaces.

POOL_DATA_P_READS

The number of data pages read in from the tablespace containers (physical) for regular and large tablespaces.

POOL_DATA_WRITES

The number of times a buffer pool data page was physically written to disk.

POOL_INDEX_L_READS

The number of index pages that have been requested from the buffer pool (logical) for regular and large tablespaces.

POOL_INDEX_P_READS

The number of index pages read in from the tablespace containers (physical) for regular and large tablespaces.

POOL_INDEX_WRITES

The number of times a buffer pool index page was physically written to disk.

Like a data page, a buffer pool index page is written to disk for the following reasons:

•
To free a page in the buffer pool so that another page can be read
•
To flush the buffer pool

POOL_READ_TIME

The total amount of time spent reading in data and index pages from the tablespace containers (physical) for all types of tablespaces. This value is given in milliseconds.

POOL_WRITE_TIME

Provides the total amount of time spent physically writing data or index pages from the buffer pool to disk. The elapsed time is given in milliseconds.

DIRECT_READ_REQS

The number of requests to perform a direct read of one or more sectors of data.

DIRECT_READ_TIME

The elapsed time (in milliseconds) required to perform the direct reads.

DIRECT_READS

The number of read operations that do not use the buffer pool.

DIRECT_WRITE_REQS

The number of requests to perform a direct write of one or more sectors of data.

DIRECT_WRITE_TIME

The elapsed time (in milliseconds) required to perform the direct writes.

DIRECT_WRITES

The number of write operations that do not use the buffer pool.

INDEX_HIT_RATIO

The percentage of index reads that were carried out from the buffer pool for the selected tablespace without having to perform physical reads.

100 * (1 - (POOL_INDEX_P_READS / (POOL_INDEX_L_READS) ) )

BUFFER_POOL_HIT_RATIO

The total hit ratio calculation for the selected tablespace.

100 * (1 - (

(POOL_DATA_P_READS +

POOL_INDEX_P_READS) /

(POOL_DATA_L_READS +

POOL_INDEX_L_READS) ) )

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