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This section includes the following topics:
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This tab enables you to see objects definitions, I/O activity, and space usage over time. This section provides a general description of how to use the Objects tab in your analysis of DB2 objects. For further information on a specific DB2 object, see DB2's relevant documentation.
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The Objects tab displays information on a selected entity and its associated entities. When you open the Objects tab the selected entity is by default Database Partition, meaning that information is displayed on the Database Partition level. When you launch the Objects tab from the Activity tab with a Table or Index entity, using the launch icon, the tab is launched in context with the entity you selected in the Activity tab.
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The entities displayed in the Association area are associated with the selected entity displayed in the Main area. At times, the relationship between the entity displayed in the Main area and those displayed in the Association area is that of parent to child and sometimes it merely represents that there is a relationship between the selected entity and the entities displayed in the Association area.
About the Main area in the Objects tab
The Main area displays overview information for the entity selected in the Association area as well as its related entity. By default, the Objects tab opens displaying information on the Database entity and its last selected related entity. You can change the database to display by selecting the desired database in the Database Partition field at the top of the Main area and its related entity by clicking the Association Control button at the top of the Association area. You can also display information on a different entity by selecting the desired entity from the Association Control button list and the related entity by selecting it from the table displayed in the Association area.
About the Association area in the Objects tab
The Association area is comprised of the Association Control button for selecting the entity whose information you want to display and a table displaying the selected entity’s related information. Two entities, Tables and Indexes, display information in two views: the Dictionary tab and the Storage & Statistics tab. The Dictionary tab displays dictionary information for this entity and the Storage & Statistics tab displays statistics based on the last runstat information for this entity.
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The Objects tab displays information on different entities. This section provides an overview of all entities, their meaning, and their views.
The following entities can be examined in the Objects tab:
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■ Tables
■ Indexes
■ Views
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■ Database Partitions
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The following table describes the information displayed for the Schemata entity.
Table 6-1 Schemata
Column Description
Schema Schema name
Owner Owner name
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Table 1 Schemata
| Column | Description |
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| Schema | Schema name. |
| Owner | Owner name. |
| Definer | The user who defined the schema. |
| Creation |
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| Time | Time of schema creation. |
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Two association selector options are available:
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- Dictionary tab. Shows dictionary information for the table.
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- Storage & statistics tab
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- . Shows table storage information and RUNSTATS information. This is the default view. The following table describes the information displayed in the Dictionary tab.
Table 6-2 Dictionary 2 Dictionary tab
Column Description
Name Table name
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| Column | Description |
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| Name | Table name. |
| Schema | Table's schema. |
| Type |
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| Temporary, MDC, MQT or normal. |
Table 6-2 Dictionary tab
Column Description
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| Tablespace | Name of primary tablespace. |
| Statistics |
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| Run | Date last analyzed. |
| Range |
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| Partitioned | Yes – for Range Partitioned table. |
| DB |
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| Partitions | The number of DB partitions this table exists in. |
| Indexes |
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| The number of indexes defined for this table. |
| Logged |
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| No or blank. |
| Lock |
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| Mode | The Lock Mode type. |
| Index |
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| Tablespace | Name of the tablespace which contains the indexes. |
| LOB |
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| Tablespace | Name of the tablespace which contains the LOBs. |
The following table describes the information displayed in the Storage and Statistics tab.
Table 6-3 Storage 3 Storage and Statistics tab
Column Description
Name Table name
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| Column | Description |
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| Name | Table name. |
| Schema | Table's schema. |
| Type |
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| Temporary, MDC, MQT or normal. |
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| Tablespace | Name of primary tablespace. |
| Statistics |
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| Run | Date last analyzed. |
| Pages |
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| Allocated | How many pages are allocated. |
| Pages |
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| Used | How many pages contain actual data. |
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| Rows | How many rows. |
| Ave. Row |
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| Len | Average row length (bytes). |
| Clustering |
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| Factor | The clustering factor of the clustering index (if one exists) or blank if no clustering index was defined. |
| Extent |
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| size | Size of extent (from tablespace definitions). |
| % Free |
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| Pages | % Free of pages. |
| % |
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| Overflows | % of records overflowing. |
| Rows per |
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| Page | Rows / (# of used pages). |
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The following table describes the information displayed in the Dictionary tab.
Table 6-4 Dictionary Table 4 Dictionary tab
Column Description
Name Index name
Schema Index schema
Table 6-4 Dictionary tab
Column Description
Table Name Base table name
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| Column | Description |
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| Name | Index name. |
| Schema | Index schema. |
| Table Name | Base table name. |
| Key Columns | The number of participating columns in the index. |
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| Includes | The number of columns included in the index. |
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| Type | Clustering, Dimensions block, Block or blank for regular. |
| Unique |
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| Yes, No, or Primary. |
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| Columns | The list of participating columns in the index. |
| Statistics |
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| Run | Time last analyzed. |
| Tablespace |
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| Name of the tablespace which contains the index. |
| Table |
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| Schema | The table’s schema. |
The following table describes the information displayed in the Storage and Statistics tab.
Table 6-5 Storage 5 Storage and Statistics tab
Column Description
Name Index name
Schema Index schema
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| Column | Description |
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| Name | Index name. |
| Schema | Index schema. |
| Tablespace | Name of the tablespace which contains the index. |
| Statistics |
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| Run | Time last analyzed. |
| Clustering Factor | Clustering |
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| factor or Cluster ratio if factor is not available. |
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| Levels | How many levels exist. |
| First Column |
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| Distincts | The number of distinct first-key values. |
| Second Column |
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| Distincts | The number of distinct keys using the first two columns. |
| Distinct |
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| Values | The number of distinct values. |
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| Leafs | How many leaf pages are in use. |
| Key |
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| Length | The key length. |
| % Deleted |
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| Rows | The percentage of rows marked ‘Deleted’. |
| Leaf |
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| Distribution | Avg. length between leaf pages. |
| % Empty |
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| Pages | Percentage of empty pages. |
| % |
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| Free | Percentage of each index page to be reserved during initial index building. |
| Extent |
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| Size | Taken from tablespace definitions |
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The following table describes the information displayed for the Views entity.
Table 6-6 Views
Column Description
View Name View name
Table 6-6 Views
Column Description
Owner View owner
Definer Name of view creator
Valid Is the view valid
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Views
| Column | Description |
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| View Name | View name. |
| Owner | View owner. |
| Definer | Name of view creator. |
| Valid | Is the view valid. |
| Text | Unformatted first N characters of view's definition |
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The following table describes the information displayed for the Database Partition Groups entity.
Table 6-7 Database 7 Database Partition Groups
Column Description
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| Column | Description |
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| Name | Name of the partition group. |
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| Partitions | Number of partitions in this group. |
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| Definer | Name of the user who defined the group. |
| Create |
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| Time | Time group was created. |
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The following table describes the information displayed for the Tablespaces entity.
Table 6-8 Tablespaces
Column Description
Name Tablespace name
Type DMS or SMS
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Table 8 Tablespaces
| Column | Description |
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| Name | Tablespace name. |
| Type | DMS or SMS. |
| Data Type | All, LOB, System temp or Declared temp. |
| Bufferpool |
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| Name of the bufferpool associated with this tablespace. |
| Bufferpool |
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| Size | Size of bufferpool on all partitions. |
| Page |
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| Size | Page size. |
| Pages |
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| Allocated | Total tablespace size. |
| Pages |
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| Used | Total tablespace used (only for DMS). |
| Extent |
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| Size | Number of pages per extent. |
| Prefetch |
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| Size | Defined prefetch size or Automatic. |
| Defined in |
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| Group | The name of the partitioned group. |
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| Overhead | DB2 internal parameter describing the overhead associated with the tablespace's disks. |
| Transfer |
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| Rate | DB2 internal parameter, describing the time it takes to read one page. |
| Definer |
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| Name of the user who defined the tablespace. |
| Remarks |
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| User comments. |
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The following table describes the information displayed for the Bufferpools entity.
Table 6-9 Bufferpools
Column Description
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Table 9 Bufferpools
| Column | Description |
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| Name | Bufferpool name. |
| Size (Pages) |
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| Bufferpool size. | |
| Page Size | Page |
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| size of the bufferpool. |
| Defined in |
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| Groups | Comma separated list of the DB partition groups to which it belongs. |
| All Tablespaces |
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| Size | Size, in MB, of all tablespaces associated with this bufferpool. |
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| Tablespaces | The number of tablespaces defined to use this bufferpool. |
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The following table describes the information displayed for the Database Partitions entity.
Table 6-10 Database Table 10 Database Partitions
Column Description
Server Server name
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| Column | Description |
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| Server | Server name. |
| ID | ID of the partition. |
| Default on Server? |
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| Yes, if this is the default partition when connecting to the database on that machine. | |
| Total |
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| Memory | Total shared memory dedicated for this database partition. |
| Total Bufferpools |
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| Size | Total shared memory dedicated for this partition's BPs. |
| Defined in |
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| Groups | Comma separated list of DB partition groups in which this DB partition participates. |
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