Page History
...
The following table describes the table shown in this view.
Table 6-19 Schema 19 Schema Changes view
| Column |
|---|
...
| Description |
|---|
...
| Timestamp |
...
| Displays the date the change took place. |
| Change |
...
| Type | Provides a description of the change, for example, Create TABLE CUSTOMER. |
...
About the Oracle File entity
The Oracle File entity is comprised of information about datafiles and temporary files. This information lets you find objects that reside on the Oracle file and the statements that access these objects. You can view the I/O statistics of the Oracle file to understand the I/O read and write time and the number of physical I/Os. The Oracle File entity displays general details, I/O activity, and storage information for the selected file.
The following views are available:
■ Overview
...
- Overview
- RAC Database
■ Dictionary
■ Storage
...
- Dictionary
- Storage
About the overview of an Oracle file
The Overview, in the Objects tab, displays general Oracle file information and several overtime graphs. The following table describes how the general information is structured.
Table 6-20 Structure 20 Structure of general information for an Oracle file
| Item |
|---|
...
| Description |
|---|
| File |
...
| Name | Displays the name of the Oracle file. |
| Folder |
...
| Displays the Operating System folder where the file is located. |
| Created |
...
| on | Displays the date the file was created. |
| Status |
...
| Displays the status of the file—Online, Offline, Recover, System. |
| Tablespace |
...
| Displays the name of the Tablespace supported by the Oracle file. |
| File |
...
| Type | Indicates whether the file is a datafile, or a temp file. |
...
...
The following table describes the overtime graphs for an Oracle file.
Table 6-21 Overtime 21 Overtime graphs for an Oracle file
| Graph |
|---|
...
| Description |
|---|
| Physical I/O |
...
| Operations | Illustrates the physical reads and physical writes over time. |
| Physical Read Time (Avg.) |
...
| Illustrates the average read times. | |
| I/O Waits (Sum.) |
...
| Illustrates the numbers of I/O waits according to wait state. | |
| Physical Write Time (Avg.) |
...
| Illustrates the average write times. |
...
About the RAC Database of an Oracle file
The RAC Database view, in the Objects tab, compares the file activity of the entire RAC database to the file activity of the selected RAC instance. This view shows aggregated wait states, and load balancing and indicates whether only the specific instance is effected by an event, or whether the entire database is effected by the event.
The following table describes the information displayed on Oracle files in the RAC Database view.
Table 6-22 Information 22 Information displayed on Oracle files in the RAC Database view
Item Description
...
| Item | Description |
|---|---|
| Database | Displays the logical name of the RAC database. |
| DB |
...
| Name | Displays the Oracle database name. |
| DB |
...
| ID | Displays the Oracle database ID. |
| Instance |
...
| Number | Displays the number of the instance in the RAC database. |
| Instances |
...
| Displays the number of instances that share the same RAC database with the selected instance. |
| Overtime |
...
| graphs | Displays the following overtime graphs that compare the Oracle file activity of the entire database to the |
...
Oracle file activity of the selected instance, over the selected time period: |
...
|
...
|
...
|
...
|
...
About the dictionary of an Oracle file
The Dictionary view, in the Objects tab, displays the general properties of the Oracle File. The following table describes how the information in the Dictionary view is structured.
Table 6-23 Structure 23 Structure of information in the Dictionary view
Item Description
...
| Item | Description |
|---|---|
| File | Displays the full path of the Oracle file. |
...
| Name | Displays the name of the Oracle file. |
...
| Folder | Displays the Operating System folder where the file is located. |
...
| Tablespace | Displays the name of the Tablespace supported by the Oracle file. |
| File |
...
| ID | Displays the Oracle ID for the file. |
| File |
...
| Type | Indicates whether the file is a datafile or temp file. |
...
| Status | Displays the status of the file—Online, Offline, Recover, System. |
...
| Autoextension | Indicates whether the file can be autoextended. |
Table 6-23 Structure of information in the Dictionary view
Item Description
...
| Created on | Displays the date the file was created. |
...
| Accessibility | Indicates whether or not the file can be written to: Read Write, or Read Only |
...
| . |
About storage information related to an Oracle file
The Storage view, in the Objects tab, displays storage information related to the Oracle File. The following table describes how the information in the Storage view is structured.
Table 6-24 Structure 24 Structure of information in the Storage view
| Item |
|---|
...
| Description |
|---|
| File |
...
| Size | Displays the current size of the file. |
| Blocks |
...
| Displays the number of blocks in the file. |
| Block |
...
| Size | Displays the block size of the file. |
| Autoextension |
...
| Indicates whether or not the file can autoextended. |
| Max. File |
...
| Size | Displays the maximum size the file can be extended to. |
| Max. |
...
| Blocks | Displays the maximum number of blocks the file can be extended to. |
| Increment |
...
| by | Displays the size allocated for further extension when auto-extending. |
Associating an Oracle file with other entities
You can associate an Oracle file in the Main area of the Objects tab with the following entities in the Association area:
...
- Tables and Indexes that are stored in the file.
...
- Statements that are run against those tables and indexes in the file.
...
- Tablespaces that the file belongs to.
...
- Storage devices that the file is mounted on. This option is only available if Precise for Storage is installed. You can display additional entities by using the More... option.
The information in the Association area table is displayed on the following tabs:
...
- Dictionary tab. Displays general properties of the Oracle File.
...
- Storage tab. Display storage information related to the Oracle File.
...
- Physical I/O
...
- tab. Displays a table of total I/O activity against the Oracle File, over the selected time period. On this tab, the table contains the following columns:
...
- File. The name of the Oracle file.
...
- Physical I/O
...
- Operations. A bar graph that shows the number of physical reads and writes.
...
- Physical
...
- Reads. The total number of physical reads executed during the selected time period. Physical Writes The total number of physical writes executed during the selected time period.
- Avg. Read REQ time (Msec.)
...
- . The average number of physical reads per minute, executed during the selected time period.
...
- Avg. Write REQ time (Msec.)
...
- . The average number of physical writes per minute executed during the selected time period.
...
- File
...
- ID. ID of the file.
...
...
About the Tablespace entity
The Tablespace entity displays general details, I/O activity and storage information for the selected Tablespace. The following views are available:
■ Overview
...
- Overview
- RAC Database
■ Dictionary
■ Storage
...
- Dictionary
- Storage
About the overview of a tablespace
...
The following table describes how the general information is structured.
Table 6-25 Structure 25 Structure of general information for a tablespace
...
Block Size Displays the underlying block size of the tablespace.
Additionally a Physical I/O Operations graph is shown.
About the RAC Database of a tablespace
...
The following table describes the information displayed on tablespaces in the RAC Database view.
Table 6-26 Information 26 Information displayed in the RAC Database view for tablespaces
Item Description
Database Displays the logical name of the RAC database.
...
Overtime Graphs Displays Database physical I/O operations in the overtime graph. The graph compares the tablespace activity of the entire database to the tablespace activity of the selected instance, over the selected time period:
About the dictionary of a tablespace
The Dictionary view, in the Objects tab, displays the general properties of the tablespace. The following table describes how the information in the Dictionary view is structured.
Table 6-27 Structure 27 Structure of information in the Dictionary view
Item Description
Name Displays the name of the tablespace.
...
Plugged in Indicates whether a transportable tablespace is available.
About storage information related to a tablespace
...
The following table describes how the information in the Storage view is structured.
Table 6-28 Structure 28 Structure of information in the Storage view
Item Description
Datafiles Displays the number of datafiles supporting the tablespace.
...
Max. Extents Displays the maximum default number of extents allowed for tables within the tablespace.
Associating a tablespace with other entities
You can associate a tablespace in the Main area of the Objects tab with the following entities in the Association area:
...
- Oracle Files that are used for storage
...
- Statements that have accessed the Tablespace
...
- Tables and Indexes in the tablespace
...
...
You can display additional entities by using the More... option.
The information in the Association area table is displayed on the following tabs:
...
- Dictionary tab. Displays general properties of the Tablespace.
...
- Storage tab. Displays storage information related to the tablespace, including used and free space, and extent information.
...
- Physical I/O
...
- tab. Displays a table of total I/O activity against the tablespace, over the selected time period. On this tab, the table contains the following columns:
...
- File. The name of the file.
...
- Physical I/O
...
- Operations. A bar graph showing the number of physical reads and writes. Avg. Read REQ Time (Msec.) Average read request time in miliseconds.
- Avg. Write REQ Time (Msec.)
...
- . Average write request time in miliseconds.
...
...
About the Table entity
The Table entity, in the Objects tab, displays general details, storage information, statistical information, and change-related information for the selected table.
The following views are available:
■ Overview
...
- Overview
- RAC Database
...
- Dictionary
...
- Storage
■ Storage
■ Statistics
■ Changes
...
- Statistics
- Changes
About the overview of a table
The Overview, in the Objects tab, displays general table information and several overtime graphs. The following table describes how the general information is structured.
Table 6-29 Structure 29 Structure of general information for a table
Item Description
Created on Displays the date the table was created.
...
Rows Displays the number of rows in the table.
Table 6-29 Structure of general information for a table
Item Description
Last Analyzed on Displays the date on which the table was last analyzed.
The following table describes the overtime graphs for a table.
Table 6-30 Overtime 30 Overtime graphs for an table
Graph Description
In Oracle (Sum.) Displays the relevant In Oracle wait states.
...
Rows Displays the number of rows in the table.
The changes, blocks and rows data is dependent on the Collect Schema Changes process. Precise for Oracle reports statistical changes when this process is run.
About the RAC Database of a Table
...
The following table describes the information displayed on tables in the RAC Database view.
Table 6-31 31 Information displayed on tables in the RAC Database view
Item Description
Database Displays the logical name of the RAC database.
...
The Dictionary view, in the Objects tab, displays the general properties of the table. The following table describes how the information in the Dictionary view is structured.
Table 6-32 Structure 32 Structure of information in the Dictionary view
Item Description
Created on Displays the date the table was created.
...
Status Displays the status of the table—whether it is valid, or invalid.
Table 6-32 Structure of information in the Dictionary view
Item Description
Cache Indicates whether the table is cached in the buffer cache.
...
Logging Contains “Yes” if logging is enabled for all operations or “NO” if minimal logging is enabled whenever applicable. For more information, see Oracle’s documentation.
Note: If the selected table is partitioned, some of these fields will not be displayed in Precise for Oracle, but they will be displayed in the table partition itself.
About storage information related to a table
...
The following table describes how the information in the Storage view is structured.
Table 6-33 Structure 33 Structure of information in the Storage view
Item Description
Table Name of the table,
...
Type Displays Type of the object.
Table 6-33 Structure of information in the Storage view
Item Description
Table # Displays table id as shown in Oracle dictionary.
Note: If the selected table is partitioned, some of these fields are not displayed in Precise for Oracle, but they will be displayed in the table partition itself.
About the statistics of a table
...
The following table describes how the information in the Statistics view is structured.
Table 6-34 Structure 34 Structure of information in the Statistics view
Item Description
Rows Indicates the number of rows.
...
Free Space per Block (Avg.) Displays the average amount of free space per block.
About table-related changes
...
The following table describes how the information in the Changes view is structured.
Table 6-35 Structure 35 Structure of information in the Changes view
Column Description
Timestamp Displays the date the change took place.
Change Type Displays a description of the change. For example: EMPLOYEE.DENSITY modified from 0.00201 to 0.00203
Associating a table with other entities
You can associate a table in the Main area of the Objects tab with the following entities in the Association area:
...
- Columns that make up the table
...
- Indexes that are related to the table
...
- Statements that access the table
...
- Table partitions
...
- Table subpartitions
You can display additional entities by using the More... option.
The information in the Association area table is displayed on the following tabs:
...
- Dictionary tab. Displays data dictionary information for the selected table.
...
- Storage tab. Displays storage information for the selected table.
...
- Statistics tab. Displays the statistics for the table, generated by the Oracle statistics collection mechanism
...
About the Index and Unused Index entities
...
The following views are available:
■ Overview
...
- Overview
- RAC Database
...
- Dictionary
...
- Storage
■ Storage
■ Statistics
■ Changes
...
- Statistics
- Changes
About the overview of an index
The Overview, in the Objects tab, displays general index information and several overtime graphs. The following table describes how the general information is structured.
Table 6-36 Structure 36 Structure of general information for an index
Item Description
Created on Displays the creation date of the index.
...
Clustering Factor Displays the clustering factor of the index.
The clustering factor is an important factor in determining how efficiently an index range scan will retrieve data from the table. It measures the degree to which the data in the index and its table are in the same order or, put another way, the probability that the next row to be fetched from the table is in the same block as the current row. It can vary between the number of blocks in the table (the best case because they are in the same order) and the number of rows in the table (the worst case because they are completely out of sync). The clustering factor tends to become worse over time as data is inserted and deleted. Note that the clustering factor makes no difference for a unique index lookup.
Table 6-36 Structure of general information for an index
Item Description
index lookup.
Leaf Blocks Displays the number of blocks at the lowest index level.
...
Last Analyzed on Displays the date when the index was last analyzed.
The following table describes the overtime graphs for a table.
Table 6-37 Overtime 37 Overtime graphs for a table
Graph Description
In Oracle (Sum.) Displays the relevant In Oracle wait states.
...
Clustering Factor Displays the clustering factor of the index.
The changes, distinct keys, and clustering factor data is dependent on the Collect Schema Changes process. Precise for Oracle reports statistical changes when this process is run.
About the RAC Database of an index
...
The following table describes the information displayed on indexes in the RAC Database view.
Table 6-38 Information 38 Information displayed on indexes in the RAC Database view
Item Description
Database Displays the logical name of the RAC database.
...
Overtime Graphs Displays the In Oracle (Sum.) overtime graph. The graph compares the index or unused index activity of the entire database, to the index or unused index activity of the selected instance, over the selected time period:
About the dictionary of an index
The Dictionary view, in the Objects tab, displays the general properties of the index. The following table describes how the information in the Dictionary view is structured.
Table 6-39 Structure 39 Structure of information in the Dictionary view
Item Description
Created on Displays the creation date of the index.
Last Modified on Displays the date on which the index was last modified.
Table 6-39 Structure of information in the Dictionary view
Item Description
Status Displays the status of the index (valid or invalid).
...
Columns Displays the number of columns in the index.
Note: If the selected index or unused index is partitioned, some of these fields will not be displayed in Precise for Oracle, but they will be displayed in the index partition itself.
About storage information related to an index
The Storage view, in the Objects tab, displays storage information related to the index. The following table describes how the information in the Storage view is structured.
Table 6-40 Structure 40 Structure of information in the Storage view
Item Description
Tablespace Displays the Tablespace in which the index is located.
...
Owner Displays the Oracle user that owns the index.
Note: If the selected index or unused index is partitioned, some of these fields will not be displayed, but they will be displayed in the index partition itself.
About the statistics of an index
The Statistics view, in the Objects tab, displays statistics that are related to the index and generated by the Oracle statistics collection mechanism.
The following table describes how the information in the Statistics view is structured.
Table 6-41 Structure 41 Structure of information in the Statistics view
Item Description
Distinct Keys Displays the number of distinct values in the index.
Clustering Factor Displays the clustering factor of the index.
The clustering factor is an important factor in determining how efficiently an index range scan will retrieve data from the table. It measures the degree to which the data in the index and its table are in the same order or, put another way, the probability that the next row to be fetched from the table is in the same block as the current row. It can vary between the number of blocks in the table (the best case because they are in the same order) and the number of rows in the table (the worst case because they are completely out of sync). The clustering factor tends to become worse over time as data is inserted and deleted. Note that the clustering factor makes no difference for a unique index lookup.
...
Last Analyzed on Displays the date when the index was last analyzed.
About changes to indexes
The Changes view, in the Objects tab, displays details of the changes made to the index. The following table describes how the information in the Storage view is structured.
Table 6-42 Structure 42 Structure of the information in the Changes view
Column Description
Timestamp Displays the date of the change.
Change Type Displays a description of the change. For example, EMP_DEPT_FK.DISTINCT_KEYS modified from 25 to 30.
Associating an index with other entities
You can associate an index in the Main area of the Objects tab with the following entities in the Association area:
...
- Columns in the index
...
- Tables that are indexed
...
- Statements that make use of the index (only if the index is used. By definition, no statements are associated with an unused index.)
...
- Index partitions and subpartitions
You can display additional entities by using the More... option.
The information in the Association area is displayed on the following tabs:
...
- Columns tab. Displays information about the columns that make up the index.
...
- Name. Displays the name of the index.
...
- Owner. Displays the Oracle user that owns the index.
...
- Columns. Displays the number of columns that make up the index.
...
- Column
...
- List. Displays the names of the columns that make up the index.
...
- Dictionary tab. Displays data dictionary information for the selected index, similar to that described in the Main area.
...
- Storage tab. Displays storage information for the selected index, similar to that described in the Main area.
...
- Statistics tab. Ddisplays statistics related to the index, as generated by the Oracle statistics collection mechanism.
...
- Index. Displays the name of the index.
...
- Owner. Displays the Oracle user that owns the index.
- Distinct
...
- keys. Displays the number of distinct values in the index.
- Clustering
...
- Factor. Displays the clustering factor of the index. The clustering factor is an important factor in determining how efficiently an index range scan will retrieve data from the table. It measures the degree to which the data in the index and its table are in the same order or, put another way, the probability that the next row to be fetched from the table is in the same block as the current row. It can vary between the number of blocks in the table (the best case because they are in the same order) and the number of rows in the table (the worst case because they are completely out of sync). The clustering factor tends to become worse over time as data is inserted and deleted. Note that the clustering factor makes no difference for a unique index lookup.
...
- Leaf
...
- Blocks. Displays the number of blocks at the lowest index level.
...
- Leaf Blocks per
...
- Key. Displays the average number of leaf blocks in which each distinct key value appears.
...
- There must be at least one leaf block for a unique key.
...
- Data Blocks per
...
- Key. Displays the average number of data blocks in which each distinct key value appears.
...
- There must be at least one leaf block for a unique key.
...
- B-
...
- Levels. Displays the number of levels above the leaf blocks in the index (indicates the depth of the index).
...
- Last Analyzed
...
- on. Displays the date when the index was last analyzed
...
...
- .
About the Column entity
The Column entity, in the Objects tab, displays general details and Oracle analysis statistics for the selected column. The following views are available:■ Overview
- Overview
■ Statistics
■ Buckets
- Statistics
- Buckets
About the overview of a column
...
The data is dependent on the Collect Schema Changes process. Precise for Oracle reports statistics changes when this process is run.
The following table describes how the general information is structured.
Table 6-43 Structure 43 Structure of general information for a column
Item Description
Table Displays the name of the table to which the column belongs.
...
Default Value Displays a default value for the column, if any.
Additionally the Distinct Values, Null Values, and Density graphs are shown.
About the statistics of a column
...
The following table describes how the information in the Statistics view is structured.
Table 6-44 Structure 44 Structure of information in the Statistics view
Item Description
Value (Min.) Displays the lowest value for the column.
...
Length (Avg.) Displays the average length of the column.
About the buckets of a column
...
The following table describes how the information in the Buckets view is structured.
Table 6-45 45 Structure of information in the Buckets view
Column Description
Bucket The divisions of the Oracle statistics histograms
Bucket Limit The data value at the upper limit of each bucket.
Associating a column with other entities
You can associate a column in the Main area of the Objects tab with the following entities in the Association area:
...
- Statements that refer to the column
...
- Tables that the column belongs to
...
- Constraints that the column is involved in
...
- Indexes that the column belongs to
You can display additional entities by using the More... option.
The information in the Association area table is displayed on the following tabs:
...
- Dictionary tab. Displays data dictionary properties of the column similar to those displayed in the Main area overview.
...
- Statistics tab. Displays statistics on the column, as generated by the Oracle statistics collection mechanism.
...
- Usage tab. Displays information on how the column has been accessed within explain plans.
...
- Column. Displays the name of the column.
...
- References. Displays the total of the counts displayed in the columns that followed, viewed as a numeric figure or bar chart.
...
- As
...
- Indexable. Displays the number of times a column could have been used as part of an index.
...
- In
...
- Select. Displays the number of times a column appeared in a Select clause.
- In
...
- Where. Displays the number of times a column appeared in a Where clause.
- In
...
- Update. Displays the number of times a column appeared in an Update clause.
- In
...
- Join. Displays the number of times a column appeared in a Join predicate.
- In
...
- Aggregate. Displays the number of times a column appeared in an Aggregate function.
- In
...
- Distinct. Displays the number of times a column appeared in a Distinct clause.
- In
...
- Order. Displays the number of times a column appeared in a Sort by clause.
- In
...
- Group. Displays the number of times a column appeared in Group by clause.
...
- Position. Displays the numeric position of the column within the entities.
...
...
About the Statement entity
...
The following views are available:
...
- In Oracle
...
- Overall activity
■ Text
■ Workshop
...
- Text
- Workshop
About In Oracle information for a statement
The In Oracle view, in the Objects tab, displays an overtime graph of the In Oracle wait states. See “Wait States” on page 35.
About the overall activity of a statement
The Overall Activity view, in the Objects tab, displays a graph that illustrates the statement's overall activity over the selected time period. See “Wait States” on page 35.
About the text of a statement
The Text view, in the Objects tab, displays the full SQL text of the selected statement.
About information on the cabinet or folder related to a statement
...
The following table describes how the information in the Workshop view is structured.
Table 6-46 Structure 46 Structure of information in the Workshop view
Item Description
Explained on Displays the date on the which the statement was last explained.
...
Comment Displays a textual comment associated with the statement.
About associating a statement with other entities
You can associate a statement in the Main area of the Objects tab with the following entities in the Association area:
- Tables
■ Tables
■ Indexes
...
- Indexes
- Views
You can display additional entities by using the More... option.
The information in the Association area table is displayed on the following tabs:
...
- General tab. Displays the statement name and a portion of the SQL. You can also click on the tuning icon to launch the SQL tab to further your analysis.
...
- Workshop tab. Displays similar information to the information displayed in the Workshop view in the Main area. It is possible to associate from a Statement to the Tables, Indexes, and Views that it accesses.
About the PL/SQL entity
The PL/SQL entity, in the Objects tab, displays general details and the text of the selected PL/SQL. The following views are available:
■ Overview
■ Text
- Overview
- Text
About the overview of a PL/SQL
The Overview, in the Objects tab, displays general information on the selected PL/SQL. The following table describes how the general information is structured.
Table 6-47 Structure 47 Structure of general information for a PL/SQL
Item Description
Name Displays the name of the PL/SQL.
...
Type Displays the type of PL/SQL. Possible values are:■ Procedure
- Procedure
...
- Function
...
- Package
...
- Package Body
Created on Displays the date on which the PL/SQL was created.
...
Status Displays the status of the PL/SQL (valid or invalid).
About the text of a PL/SQL
The Text view, in the Objects tab, displays the full text of the selected PL/SQL.
Associating a PL/SQL with other entities
You can associate a PL/SQL in the Main area of the Objects tab with the following entities in the Association area:
...
- Objects referenced in the text
...
- Views referenced in the text
...
- Tables referenced in the text
You can display additional entities by using the More... option.
About the View entity
The View entity, in the Objects tab, displays general details and the text for the selected view. The following views are available:
■ Overview
■ Text
...
- Overview
- Text
About the overview of a view
The Overview, in the Objects tab, displays general information on the selected view.
The following table describes how the general information is structured.
Table 6-48 Structure 48 Structure of general information for a view
Item Description
Name Displays the name of the view.
...
Object ID Displays the unique Oracle object ID for the view.
About the text of a view
The Text view, in the Objects tab, displays the full text of the selected view.
Associating a view with other entities
You can associate a view in the Main area of the Objects tab with the following entities in the Association area:
...
- Statements that access the view
...
- Columns that the view includes
You can display additional entities by using the More... option.
About the Attribute entity
The Attribute entity, in the Objects tab, displays general information (Overview) that is retrieved from the data dictionary.
Associating an attribute with other entities
You can associate an attribute, in the Objects tab, with the following entities:
...
- User-defined type of attribute
...
- User-defined type containing attribute
You can display additional entities by using the More... option.
About the Cluster entity
The Cluster entity, in the Objects tab, displays information from the data dictionary (Overview and Storage view) and lists the schema changes that have been made to the cluster during the selected time period (Schema Changes view).
Associating a cluster with other entities
You an associate a cluster in the Objects tab with the following entities:
■ Tables
■ Columns
...
entities:
- Tables
- Columns
- Indexes
You can display additional entities by using the More... option.
The information in the Association area table is displayed on the following tabs:
...
- Dictionary tab. Displays data dictionary information for the associated clusters, such as status, cache, creation date and when they were last modified.
...
- Storage tab. Display storage information related to the associated clusters, such as tablespace, initial extent and next extent, and percent increased, used and free.
About the Constraint entity
The Constraint entity, in the Objects tab, displays general information that is retrieved from the data dictionary.
Associating a constraint with other entities
You can associate a constraint with the following entities:
- Columns
...
- Tables
■ Tables
■ Views
...
- Views
- Constraints
You can display additional entities by using the More... option.
About the Index Partition and Index Sub-Partition entities
When an index partition (or index sub-partition) is displayed in the Main area of the Objects tab, the Overview and the Storage view are available. Both views display information from the data dictionary.
Associating an index partition or sub-partition with other entities
You can associate an index partition or sub-partition in the Main area of the Objects tab with the following entities in the Association area:
...
- Columns in the index (sub-)partition
...
- Index that owns the index (sub-)partition
...
- Columns in the partition key.
You can display additional entities by using the More... option.
The information in the Association area table is displayed on the following tabs:
...
- Dictionary tab. Displays information from the data dictionary.
...
- Storage tab. Displays information from the data dictionary.
...
- Statistics tab. Displays Oracle analysis statistics.
...
...
About the Indextype entity
When an indextype is displayed in the Main area of the Objects tab, the Overview provides general information from the data dictionary.
About associating an indextype with other entities
You can associate an indextype in the Main area of the Objects tab with User Defined Types and PL/SQLs. You can display additional entities by using the More... option.
About the LOB entity
When an LOB is displayed in the Main area of the Objects tab, the Overview provides general information from the data dictionary.
About associating an LOB with other entities
...
The information in the Association area is displayed on the Dictionary and Storage tabs. Both display information from the data dictionary.
About the Materialized View entity
When a materialized view is displayed in the Main area of the Objects tab, it shows general information from the data dictionary (Overview) and the definition of the materialized view (Text view).
Associating a materialized view with other entities
...
The information in the Association area is displayed on the Dictionary tab, which shows information from the data dictionary, and the Text tab, which shows the view's definition.
About the Method entity
When a method is displayed in the Main area of the Objects tab, it shows general information from the data dictionary (Overview) and the definition of the method (Text view).
Associating a method with other entities
You can associate a method in the Main area of the Objects tab with its return type, that is, a user-defined type. You can display additional entities by using the More... option.
About the Rollback entity
When a rollback is displayed in the Main area of the Objects tab, the following views are available:
...
- Overview. Displaying information from the data dictionary.
...
- Statistics. Displays information relating to the Oracle analysis statistics.
...
- Rollback Wait Graph. Displays a graphical view of the rollback wait activity. You cannot drill down from an imported statement to other entities.
When the rollback is selected in the Association area, information is displayed on the following tabs:
...
- Details. Displays the same information as the Overview in the Main area.
...
- Statistics. Displays Oracle analysis statistics; lists only rollback segments with an online status. You can display additional entities by using the More... option.
...
About the Sequence entity
When a sequence is displayed in the Main area of the Objects tab, the Overview provides general information from the data dictionary.
Associating a sequence with other entities
You can associate a sequence in the Main area of the Objects tab with PL/SQLs or other objects that use it, for example triggers and synonyms. You can display additional entities by using the More... option.
About the Synonym entity
When a synonym is displayed in the Main area of the Objects tab, the Overview displays general information from the data dictionary.
When a synonym is displayed in the Association area, it displays data dictionary information.
Associating a synonym with other entities
You can associate a synonym in the Main area of the Objects tab with its referenced object. You can display additional entities by using the More... option.
About the Table Partition and Table Sub-Partition entities
...
When a table partition or table sub-partition is displayed in the Association area, information is displayed on the following tabs:
...
- Dictionary. Displays data dictionary information.
...
- Storage. Displays data dictionary information.
...
- Statistics. Displays Oracle analysis statistics.
You can associate an table partition or sub-partition in the Main area with the following entities in the Association area:
...
- Columns in the table (sub-)partition
...
- Columns in the partition key
...
- Table that spans the table (sub-)partition
You can display additional entities by using the More... option.
About the Trigger entity
When a trigger is displayed in the Main area of the Objects tab, the following views are available:
...
- Overview. Displays information from the data dictionary.
...
- Text. Displays the trigger definition.
...
- Schema Changes. Displays changes that have been made to the trigger during the selected time period. When a trigger is displayed in the Association area, it displays data dictionary information.
...
Associating a trigger with other entities
You can associate a trigger in the Main area of the Objects tab with the table or view that the trigger is defined for. You can display additional entities by using the More... option.
About the User entity
When a user is displayed in the Main area of the Objects tab, the Overview displays general information from the data dictionary.
When a user is displayed in the Association area, it displays data dictionary information.
Associating a user with other entities
You can associate a user in the Main area of the Objects tab with the tables, indexes, or views owned by the user, or with the statements that the user has executed. You can display additional entities by using the More... option.
About the User-Defined Type entity
When a user-defined type is displayed in the Main area of the Objects tab, the following views are available:
...
- Overview. Displays information from the data dictionary.
...
- Text. Displays a definition of the user defined type.
When a user-defined type is displayed in the Association area, it displays data dictionary information.
Associating a user-defined type with other entities
You can associate a user-defined type in the Main area of the Objects tab with attributes of that type, its own attributes and methods, and the objects where it is declared. You can display additional entities by using the More... option.
About the EMC Unit entity
...
The following views are available:
- Overview
...
- Performance
■ Performance
■ Load
■ Throughput
...
- Load
- Throughput
About the overview of an EMC unit
The Overview, in the Objects tab, displays general information on the Symmetrix unit, such as ID, model, and number of physical disks.
About the performance of an EMC unit
The Performance view, in the Objects tab, displays two overtime graphs that illustrate the following information:
...
- The number of sequential reads and the total number of read and write requests during the selected time period.
...
- The read, write, and overall cache hit ratios over the same time period.
...
...
About the load of an EMC unit
The Load view, in the Objects tab, displays an overtime graph that illustrates the megabytes of data read and written during the selected time period.
About the throughput of an EMC unit
The Throughput view, in the Objects tab, displays an overtime graph that illustrates the I/O rate (requests per second) and the throughput (megabytes per second) over the selected time period.
Associating an EMC unit with other entities
You can associate an EMC unit in the Main area of the Objects tab with the disk directors, front end directors, remote directors, and devices configured for the unit. You can display additional entities by using the More... option.
| Anchor | ||||
|---|---|---|---|---|
|
...
The Objects tab helps you understand the relationship between database objects and statements. You can identify a performance problem by doing one or more of the following:■ Examining
- Examining INIT.ORA parameters
...
- About examining schema changes and tablespaces
...
...
Examining INIT.ORA parameters
INIT.ORA parameters can help you when tuning a statement, object or instance in the Objects tab. To examine INIT.ORA parameters1 In
- In the Time Frame list, choose the period of time you want to analyze.
...
- In the Instance list, choose the instance you want to view.
...
- In the Main area, observe the Init Parameters view.
...
...
About examining schema changes and tablespaces
You can observe information on the schema changes in the Objects tab, by selecting an instance and the Schema Changes view.
To examine schema changes and tablespaces
...
- In the Time Frame list, choose the period of time you want to analyze.
...
- In the Instance list, choose the instance you want to analyze.
...
- On the View controls in the Main area, click Schema Changes to open a view for that instance.
...
- Now take a look at the Tablespaces entities, to understand how objects grow over time and what effect their growth has on performance. For example, the Objects tab shows storage information on tablespaces in Instance ora920, including the used and free space. Clicking a tablespace reveals details of an individual tablespace.
In another example, we analyze the number of reads and writes to a tablespace storing indexes. Here the number of physical write operations is much higher than the physical reads, probably as a result of heavy insert or update activity. This may indicate that the performance of insert or update statements is suffering because of the requirement to maintain the indexes.
For example, the number of physical reads from all the tables in tablespace XDB has increased over time. This is probably due to index range scans or full table scans that need to return more rows.
Precise. Performance intelligence from click to storage. Learn more > >
...