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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 Buffer Pools Collection

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

DBPARTITIONNUM

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

INSTANCE_NAME

The name of the monitored instance.

DB_NAME

The name of the monitored database.

BP_NAME

The name of the monitored buffer pool.

TABLESPACES

The number of the tablespaces using this buffer pool.

TOTAL_LOGICAL_READS

The total number of logical reads (index, XDA, and data) in the buffer pool.

TOTAL_LOGICAL_READS_S

The total number of logical reads per second (index, XDA, and data) in the buffer pool.

TOTAL_PHYSICAL_READS

The total number of physical reads (index, XDA, and data) in the buffer pool.

TOTAL_PHYSICAL_READS_S

Total number of physical reads per second (index, XDA, and data) in the buffer pool.

TOTAL_HIT_RATIO_PERCENT

The total hit ratio (index, XDA, and data reads).

DATA_LOGICAL_READS

The data logical reads, which includes access to data that is:

DATA_LOGICAL_READS_S

The data logical reads per second.

DATA_PHYSICAL_READS

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

DATA_PHYSICAL_READS_S

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

DATA_HIT_RATIO_PERCENT

The data hit ratio.

INDEX_LOGICAL_READS

The index logical reads, which includes access to index pages that are:

INDEX_LOGICAL_READS_S

The index logical reads per second.

INDEX_PHYSICAL_READS

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

INDEX_PHYSICAL_READS_S

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

INDEX_HIT_RATIO_PERCENT

The index hit ratio.

XDA_LOGICAL_READS

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

XDA_LOGICAL_READS_S

The number of data pages per second for XML storage objects (XDAs) that have been requested from the buffer pool (logical) for regular and large tablespaces.

XDA_PHYSICAL_READS

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

XDA_PHYSICAL_READS_S

The number of data pages per second for XML storage objects (XDAs) read in from the tablespace containers (physical) for regular and large tablespaces.

XDA_HIT_RATIO_PERCENT

The auxiliary storage objects hit ratio.

POOL_READ_TIME_S

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

POOL_WRITE_TIME_S

The total amount of time spent physically writing data or index pages from the buffer pool to disk.

DIRECT_READS

The number of read operations that do not use the buffer pool. Direct reads are used when:

Reading LONG VARCHAR columns

Reading LOB (large object) columns

Performing a backup

DIRECT_READS_S

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

DIRECT_WRITES

The number of write operations that do not use the buffer pool. Direct writes are used when:

DIRECT_WRITES_S

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

DIRECT_READ_TIME_S

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

DIRECT_WRITE_TIME_S

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

FILES_CLOSED

The total number of database files closed.

You can use this element to assist in determining the best value for the maxfilop configuration parameter.

UNREAD_PREFETCH_PAGES

The number of pages that the prefetcher read in that were never used.

If this number is high, prefetchers are causing unnecessary I/O by reading pages into the buffer pool that will not be used.

GBP_LOGICAL_READS

The number of times an attempt was made to read a group buffer pool (GBP) dependent page from the group buffer pool, because the page was either invalid or not present in the local buffer pool (LBP). This is for pureScale instances only, which are not yet supported.

GBP_PHYSICAL_READS

The number of times a GBP dependent page was read into the LBP from disk, because it was not found in the GBP. This is for pureScale instances only, which are not yet supported.

GBP_HIT_RATIO

The percentage of time a requested page was found in the GBP out of all of the times it was requested. If a page is found in the GBP, that saves the database time, because the database does not have to look for it in the LBP. This is for pureScale instances only, which are not yet supported.

Database Tables Collection

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

DBPARTITIONNUM

The database partition from which the data was retrieved.

INSTANCE_NAME

The name of the monitored instance.

DB_NAME

The name of the monitored database.

TABSCHEMA

The schema of the table.

Along with TABNAME this element can assist in determining the source of the contention for resources.

TABNAME

The name of the table.

TAB_TYPE

The type of table for which information is returned.

Types:

TBSP_ID

An integer that uniquely represents a tablespace used by the current database.

DATA_OBJECT_PAGES

The number of disk pages consumed by a table. This represents the base table size only. Space consumed by index objects, LOB data, and long data are reported by INDEX_OBJECT_PAGES, LOB_OBJECT_PAGES, and LONG_OBJECT_PAGES, respectively.

INDEX_OBJECT_PAGES

The number of disk pages consumed by all indices defined in a table.

LOB_OBJECT_PAGES

The number of disk pages consumed by LOB data.

LONG_OBJECT_PAGES

The number of disk pages consumed by long data in a table.

XDA_OBJECT_PAGES

The number of disk pages consumed by XML storage object (XDA) data.

ROWS_READ

The number of rows read from the table.

ROWS_WRITTEN

The number of rows changed (inserted, deleted, or updated) in the table.

OVERFLOW_ACCESSES

The number of reads and writes from/to overflowed rows of this table.

PAGE_REORGS

The number of page reorganizations executed for a table.

Database Partition Backup Collection

The following table provides a list of the Database Partition Backup Collection metrics that are collected, and a description for each.

DBPARTITIONNUM

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

LAST_SUCCESSFUL_BACKUP_START

The start time of the last successful backup.

LAST_SUCCESSFUL_BACKUP_END

The end time of the last successful backup.

LAST_SUCCESSFUL_BACKUP_TYPE

The type of the last successful backup.

Values:

DAYS_SINCE_LAST_SUCCESSFUL

The number of days that have passed since the last successful backup.

LAST_BACKUP_START

The start time of the last backup.

LAST_BACKUP_END

The end time of the last backup.

LAST_BACKUP_TYPE

The type of the last backup.

Values:

LAST_BACKUP_STATUS

The sqlcode value returned for the most recent running backup.

Values:

For more detail, query dbadmin db_history.

Database Tables Global Collection

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

INSTANCE_NAME

The name of the monitored instance.

DB_NAME

The name of the monitored database.

TABSCHEMA

The schema of the table.

Along with TABNAME, this element can assist in determining the source of the contention for resources.

TABNAME

The name of the table.

TAB_TYPE

The type of table for which information is returned.

Types:

TBSP_ID

An integer that uniquely represents a tablespace used by the current database.

DATA_OBJECT_PAGES

The number of disk pages consumed by a table. This represents the base table size only. Space consumed by index objects, LOB data, and long data are reported by INDEX_OBJECT_PAGES, LOB_OBJECT_PAGES, and LONG_OBJECT_PAGES, respectively.

INDEX_OBJECT_PAGES

The number of disk pages consumed by all indices defined in a table.

LOB_OBJECT_PAGES

The number of disk pages consumed by LOB data.

LONG_OBJECT_PAGES

The number of disk pages consumed by long data in a table.

XDA_OBJECT_PAGES

The number of disk pages consumed by XML storage object (XDA) data.

ROWS_READ

The number of rows read from the table.

ROWS_WRITTEN

The number of rows changed (inserted, deleted, or updated) in the table.

OVERFLOW_ACCESSES

The number of read and write operations from/to overflowed rows of this table.

PAGE_REORGS

The number of page reorganizations executed for a table.

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