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The Top Activity Section is composed of a series of tabs that provide detailed statistics on individual SQL statements and sessions that were waiting or executing over the length of a profiling session.
- The top SQL tab provides more detailed information than provided on the Overview tab, in terms of executing SQL statements and procedures. For more information, see Top SQL Tab.The top ExecutionActivity (DB 2 Specific) tab provides details about the statements and procedures that ran. This is DB 2 specific. For more information, see Top Execution Activity Tab (DB2 Specific).
- The top Events tab displays information about wait events profiled by the execution process. For more information, see Top Events Tabtab.
- The top Sessions tab displays information about sessions profiled by the execution process. For more information, see Top Sessions Tabtab.
- The top Blockers tab (Oracle) displays information about blocking sessions. For more information, see Top Blockers Tab (Oracle Specific)tab.
- The top ObjectI/O tab (Oracle-Specific) tab does not appear in the Top Activity Section unless the data source being profiled is an Oracle platform. This tab displays information tab displays information about the I/O profiled by the execution process. For more information, see Top Object I/O Tab (Oracle-Specific)tab.
- The top Procedures tab (Oracle, SQL Server, and Sybase-specific) displays tab displays information about procedures observed during profiling. For more information, see Top Procedures Tab (Oracle, SQL Server, and Sybase Specific)tab.
When you select any item from the Top Activity tabs, details are displayed in the Profiling Details view. The tabs that appear in Profiling Details will be different depending on the database platform and whether you selected a statement, session, or an event. This is to accommodate the parameter specifics of the item you selected.
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Top SQL
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The Profile editor's SQL tab shows a representation of all SQL statements that are executing or waiting to execute over the length of the profiling session or within the currently selected graph bars.
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Statements
Statements can be grouped by type by right-clicking the view and selecting Organize > By Type.
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Right-clicking the SQL tab and selecting Organize By lets you choose between Statement Type grouping and None. The None option disables grouping by statement. |
Statistics
Statistics are provided for statements and statement components. The statistics let you evaluate costs and spot wait event problems not just at the level of entire SQL statements, but also at the level of statement components. For each subject, predicate or remainder entry, the following statistics are provided:
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Columns displayed on the top SQL tab differ depending on the data source platform. |
| StatisticShown for Platform | Notes | ||
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| ExeutionsSQL Server, Oracle, Sybase, DB2 | The number of active executions for the statement or statement component over the length of the profiling session or the selected graph bars. | ||
| Avg. Elapsed (sec) | Oracle, DB2 | The average amount of time that elapsed while executing the statement during the profiling period. This column appears for only SQL Server, DB2 and Oracle data sources. | |
| DB Activity (%) | DB Activity (%) | SQL Server, Oracle, Sybase, DB2 | A graphical representation of the distribution of execution and wait time for the statement or statement component. |
| SQL IDOracle | The ID value of the SQL statement. This statistic only appears on Oracle data sources. | ||
| Child NumberOracle | The child number in the database. This statistic only appears on Oracle data sources. | ||
| Parsing User IDOracle | The ID of the user who parsed the statement. This statist only appears on Oracle data sources. | ||
| Plan Hash Value | Oracle | The The execution value of the statement. This statistic only appears on Oracle data sources. |
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Events tab
The Top Events tab displays information about wait events on the resources involved in the profiling process. This display is used to tune at the application or database configuration level. For example, if the top events are locks, then application logic needs to be examined. If top events are related to database configuration, then database setup should be investigated.
In addition to the statistics displayed on the Top SQL tab, DB2 platforms have an additional tab in the Profile Session editor named Execution Activity, which contains the following statistical rows: Rows Read, Rows Written, Fetch Count, Statement Sorts, Sort Time, and Sort Overflows.
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Sessions tab
The Top Events tab displays information about wait events on the resources involved in the profiling process. This display is used to tune at the application or database configuration level. For example, if the top events are locks, then application logic needs to be examined. If top events are related to database configuration, then database setup should be investigated.
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The columns that display are data source-dependent. For example, the Wait Count and Avg. Per Wait (sec) columns display only for an Oracle data source. |
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The Sessions Tab provides information about individual sessions. This tab provides information about sessions that are very active or bottlenecked.
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The Blockers tab provides details on sessions holding blocking locks.
The following parameters are displayed on the Blockers tab:
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The user name under which the session was run.
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The name of the executable under which the session was run.
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The SID value of the session.
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The serial number of the machine from which the session executed.
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A graphical representation of the percentage of total blocked sessions being blocked by a blocking session.
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The machine name and network location of the machine from which the session executed.
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The type of session.
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For more detailed information, see Viewing Details on the Blockers Tab (Oracle). |
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The Object I/O Tab is specific to the Oracle data source platform, and displays information about Oracle I/O loads on the profiled data source.
The following parameters are displayed on the I/O tab:
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The unique ID value of the file from where specified object resides.
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The Procedures tab is specific to Oracle, SQL Server, and Sybase data source platforms. It displays information about Procedure loads on the profiled data source.
The following parameters are displayed on the Procedures tab:
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The name of the procedure affecting the database performance.
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The name of the database where the procedure resides.
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The owner of the schema in which the procedure resides.
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A unique ID created when the procedure is created.
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The Profiling Details view displays detailed information on any item selected in the Top Section View, such as an SQL statement, an Event, a Session or a Procedure.
Depending on the data source platform you have specified, the tabs that appear in the view will be different, in order to accommodate the parameter specifics of the statement you have selected.
Depending on the top activity selected and the profiled platform types, some tabs may not be available.
Statement Selected
When a Statement is selected, the following Profile Detail tabs are available.
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Shows which sessions held blocking locks against the session associated with this statement.
Double-clicking an entry on this tab opens that session in the Top Blockers tab, letting you find more information on the blocking session. For details, see Top Blockers Tab (Oracle Specific).
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Lists all copies of the cursor or SQL query, if Oracle has cached multiple copies of the same statement.
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Shows bind variable information for SQL captured during the Profiling session.
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Event Selected
When an Event is selected, the following Profile Detail tabs are available.
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Shows which sessions held blocking locks against the session associated with this event.
Double-clicking an entry on this tab opens that session in the Top Blockers tab, letting you find more information on the blocking session. For details, see Top Blockers Tab (Oracle Specific).
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Shows which procedures contain the selected event.
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Raw data that was sampled from the database, specifically the following:
- Sample time
- SID
- Serial #
- User name
- Program
- Sql ID
- P1
- P2
- P3
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Displays for "buffer busy waits" and "cache buffer chains latch" waits. The analysis shows data and documentation to assist in solving these bottlenecks.
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Session Selected
When a Session is selected, the following Profile Detail tabs are available.
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Provides parameters regarding the session. For example, database server connection information, and data regarding the client tool and application.
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Shows which sessions held blocking locks while this session was active.
double-clicking an entry on this tab opens that session in the Top Blockers tab, letting you find more information on the blocking session. For more details, see .
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Provides identifier and V$SESSION session information on the sessions being locked by the blocking session.
Provides parameters regarding the session. For example, database server connection information, and data regarding the client tool and application.
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This section also addresses the following topics:
• Viewing Details on the SQL Tab
• Viewing Details on the Sessions Tab
• Viewing Details on the Events Tab
• Viewing Details on the Procedures Tab
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The SQL Details tab provides information and the execution of the statement and other information related to how it is running. It is only applicable to Oracle data sources:
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The Events tab provides details about the events that the statement is associated with.
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The Sessions tab provides information about any sessions the statement is associated with:
Session details include information on different parameters, depending on the platform. For example, on Oracle platforms, the following parameters are displayed: User Name, Program, SID, Serial #, Activity (%), Network Machine Name, and Session Type.
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The Procedures tab provides information about any procedures containing the selected statement.
The following parameters are displayed on the Procedures tab:
Value Description
Procedure NameThe name of the procedure that contains the selected statement. Database NameThe name of the database where the procedure resides.
Procedure IDThe unique ID value of the file where the specified procedure resides. ExecutionsThe number of times the procedure was executed.
DB Activity (%)Use the color chart on the right-hand side of the Procedures tab to view the procedures load on the data source during the profiling session.
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In the Top Activities Section, selecting an entry on the Blocked Sessions tab displays information on sessions holding blocking locks in the Profiling Details view.
Blocked Sessions
The Blocked Sessions tab provides general information on blocked sessions and the details identifying the specific row locked.
This tab provides the following columns for each blocked session:
Value | Notes |
User Name | The user name under which the blocking session was run. |
SID | The SID value of the blocking session. |
ROW_WAIT_OBJ# | Object ID of the table containing the row specified in ROW_WAIT_ROW#. |
ROW_WAIT_FILE# | Identifier of the datafile containing the row specified in |
ROW_WAIT_BLOCK# | Identifier of the block containing the row specified in ROW_WAIT_ROW#. |
ROW_WAIT_ROW# | The current row being locked. |
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Sessions Tab provides information about individual sessions. This tab provides information about sessions that are very active or bottlenecked.
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The Blockers tab provides details on sessions holding blocking locks.
The following parameters are displayed on the Blockers tab:
| Value | Description |
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| User Name | The user name under which the session was run. |
| Program | The name of the executable under which the session was run. |
| SID | The SID value of the session. |
| Serial | The serial number of the machine from which the session executed. |
| Blocking (%) | A graphical representation of the percentage of total blocked sessions being blocked by a blocking session. |
| Machine | The machine name and network location of the machine from which the session executed. |
| Session Type | The type of session. |
| Client Info | The name/type of the client from which the session initiated. |
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For more detailed information, see Viewing details on the Blockers tab. |
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The Object I/O tab displays information about Oracle I/O loads on the profiled data source.
The following parameters are displayed on the I/O tab:
| Value | Description |
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| Object | The name of the data source object affecting the Oracle I/O. |
| Type | The object type. For example, table, partition, or index. |
| DB Activity (%) | Use the color chart on the right-hand side of the I/O tab to view the I/O load on the data source during the profiling session. |
| Tablespace | The name of the tablespace where the object resides. |
| File ID | The unique ID value of the file from where specified object resides. |
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The Procedures tab displays information about Procedure loads on the profiled data source.
The following parameters are displayed on the Procedures tab:
| Value | Description |
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| Procedure Name | The name of the procedure affecting the database performance. |
| Oracle | The owner of the schema in which the procedure resides. |
| Procedure ID | A unique ID created when the procedure is created. |
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