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The Instance Overview displays information on the activity of the instance in the Main area. The following table describes the information displayed in the Instance Overview.
Table 4- 1 Instance Overview
| Item | Description |
|---|
| Sessions | Displays information on the following items: - Connected. Number of sessions that were connected to the Oracle instance during the last minute.
- Active. Number of sessions that were connected to the Oracle instance during the last minute and spent time executing In Oracle.
- Locked. Number of locked sessions.
- Sessions via Dedicated Server. Number of sessions that were connected to the Oracle instance using an Oracle dedicated server process (or shadow process) during the last minute.
- Sessions via Shared Server. Number of sessions that were connected to the Oracle instance using an Oracle multi-threaded server process (MTS) during the last minute.
- Active Sessions In Oracle. Average In Oracle time of active sessions during the last minute.
Equals the total In Oracle time divided by the number of active sessions. The format is:
hh:mm:ss.s
|
| Parallelism | Displays information on the following items: - Idle Parallel Servers. Number of PQ servers that have not been used in the last minute.
- Active Parallel Servers. Number of PQ servers that have been used in the last minute.
|
| In Oracle (Last Minute) | Displays information on the following items: - Sub-State. In Oracle sub-state.
- Bar graph. Graphical representation of the Time column.
- Time. Amount of time that sessions were in this state.
- %. Percentage of time that sessions were in this state.
- Sessions. Number of sessions in each state. A session may be in more than one state during one minute.
See “In Oracle” on page 36. |
| Overall Activity (Last Minute) | A pie chart illustrating the overall activity of all sessions during the last minute. See “Overall activity” on page 35. |
| Work Types (Last Minute) | If the chosen instance has ERP support installed, this tab also displays a pie chart of work types. |
About associating an Instance with other entities
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The following table describes the information shown on Instance Association tabs.
Table 4- 2 Instance Association tabs
| Tab | Columns |
|---|
| General | Displays the following table columns: - Icon. Indicates the current sub-state.
- Icon. Enables the Kill Session process.
- Program. Name of the program connected to Oracle.
- Session ID. Session ID or number.
- Oracle Process ID. OS-assigned process ID of the Oracle server process.
- Serial #. Oracle serial number, which, along with the session ID, uniquely identifies a session.
- In Oracle. Bar chart showing the In Oracle breakdown for the session.
- Sub-State. Snapshot of the current In Oracle wait sub-state.
- Wait Event. Snapshot of the current Oracle wait event.
- Tune icon. Allows launching the SQL tab in the context of the current statement.
- Text. Portion of any SQL statement that is actually being executed at the time of the refresh; otherwise, it is blank.
See “In Oracle” on page 36. |
| In Oracle | Displays the following table columns: - Icon. Indicates the current sub-state.
- Session ID. Session ID or number.
- Oracle Process ID. OS-assigned process ID of the Oracle server process.
- In Oracle. Bar chart showing the Oracle breakdown for the session.
- Using CPU. In Oracle wait state.
- I/O wait. In Oracle wait state.
- Application Lock wait. In Oracle wait state.
- Commit & Checkpoint wait. In Oracle wait state.
- Communication wait. In Oracle wait state.
- Internal Lock wait. In Oracle wait state.
- Oracle Server wait. In Oracle wait state.
- Operating System wait. In Oracle wait state.
- RAC/OPS/Other wait. In Oracle wait state.
See “In Oracle” on page 36. |
| Conection | Displays the following table columns: - Icon. Indicates the current sub-state.
- Session ID. Session ID or number.
- Oracle Process ID. The ID of the Oracle server process. This ID is assigned by the operating system.
- Oracle Process Type. Any of the following:
- Dedicated: Indicates a multi-threaded server
- Shared: Indicates a server that is not multi-threaded
- Parallel: Indicates that the session is a sub-session of another session
- Connect Time. The date and time that the session got connected to Oracle.
- Work Type. Group of Oracle activities. Only relevant when an Interpoint is installed.
See “About the Dashboard tab” on page 43. - ERP. Indicates the kind of Interpoint that is used. Can be OA (Oracle Applications), SAP, PS (PeopleSoft), or SBL (Siebel). If no Interpoint is installed, N/A is displayed.
- Host User. The name of the host user. The information in this column is derived from Oracle's v$session table.
- User. The name of the user. The information in this column is derived from Oracle's v$session table.
- Program. The name of the program. The information in this column is derived from Oracle's v$session table.
- Machine. The name of the machine. The information in this column is derived from Oracle's v$session table.
- Module. The name of the module. The information in this column is derived from Oracle's v$session table.
- Action. The name of the action. The information in this column is derived from Oracle's v$session table.
- Terminal. The terminal name of the operating system. The information in this column is derived from Oracle's v$session table.
- Status. Status of the session.
See “In Oracle” on page 36. |
| Info |
|---|
Precise for Oracle retrieves the displayed information from Oracle's V$SESSION table. If this table does not contain relevant data for a specific cell in the Association table, this cell is not populated with data. |
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The following table describes the information displayed in a Session Overview.
Table 4- 3 Session Overview
| View area | Description |
|---|
| Session | Displays information for the following items: - Serial #. Oracle serial number, which, along with the session ID, uniquely identifies a session.
- Connected Time. Time that the session connected to Oracle.
- Duration. Duration of the session since it connected.
- Sampling Start Time. Time that the Collector started sampling this session.
- Sampling Duration. Duration that the Collector has sampled this session.
- Oracle Process ID. Process ID of the Oracle server or shadow process.
- Client Process ID. Process ID of the client or application process, if it is running on the same server as the instance; otherwise, it is zero.
- Oracle Process Type. Type of Oracle server process: Dedicated or MTS.
See “In Oracle” on page 36. |
| Connection | Displays information for the following items: - Program. Name of the program connected to Oracle.
- Module. Current Oracle module, if Oracle Modules and Actions are used.
- User. Name of the Oracle user.
- Host User. Name of the OS user connected to Oracle.
- Machine. Name of the machine connected to Oracle.
- Terminal. Name of the terminal connected to Oracle.
- Sub-State. Snapshot of the In Oracle wait state.
- Wait Event. Snapshot of the Oracle wait event. This is equivalent to the EVENT column in the V$SESSION_WAIT table.
- Open + Fetches. The number of times that the Collector encountered the session either opening or fetching from a cursor.
See “Executions vs. opens and fetches” on page 39. |
| In Oracle (Last Minute) | Displays information for the following items: - Sub-StateIn. Oracle sub-state.
- Bar graph. Graphical representation of the Time column.
- Time. Amount of time the session was in this state.
- %. Percentage of time the session was in this state.
|
About the text of a current or active session
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The following table describes the entities that are available in the Association area.
Table 4-4 Association area entities
| Entity | Description |
|---|
| Statements | Displays a list of statements run by the session during the last minute. |
| Sessions Involved in Lock | Displays a list of other sessions locking or locked by this session during the last minute. Three of the tabs displayed here are the same as those displayed for a regular session. In addition, the Lock tab displays locking information that is equivalent to the information displayed in Oracle's V$SESSION_WAIT table (For more information, see the Oracle documentation). |
| Parallel Query Server Sessions | Displays Parallel Query Coordinator or Parallel Query Slave sessions associated with this session during the last minute. The tabs displayed here are the same as those displayed for a regular session. See “About associating an Instance with other entities” on page 53. |
| Info |
|---|
If you drill down to a Parallel Query Server process, the Main area displays information on this session. You can then identify the Parallel Query Coordinator Session using the Association controls. |
The following table explains the information that is displayed on the tabs in the Association area, when the Statements entity is selected.
Table 4- 5 Statements Association area table
| Tab | Columns |
|---|
| Statement | Displays the following table columns: - Statement. Unique identifier assigned by the Collector to the SQL statement.
- Hash Value. Value assigned to the statement by Oracle.
- In Oracle. Bar graph showing the In Oracle breakdown.
- Tune icon. Allows launching the SQL tab in the context of the current statement. Clicking elsewhere in the row drills down to the statement in Current tab.
- Text. Portion of the SQL text for the statement. Note that if the cursor is moved over the text, then a tool-tip appears containing the full text of the statement.
See “Statement identifier vs. Oracle hash value” on page 39. See “In Oracle” on page 36. |
| In Oracle | Displays the following table columns: - Statement. Unique identifier assigned by the Collector to the SQL statement.
- In Oracle. Bar chart showing the In Oracle breakdown for the session.
- Using CPU. In Oracle wait state.
- I/O wait. In Oracle wait state.
- Application Lock wait. In Oracle wait state.
- Commit & Checkpoint wait. In Oracle wait state.
- Communication wait. In Oracle wait state.
- Internal Lock wait. In Oracle wait state.
- Oracle Server wait. In Oracle wait state.
- Operating System wait. In Oracle wait state.
- RAC/OPS/Other wait. In Oracle wait state.
See “Statement identifier vs. Oracle hash value” on page 39. See “In Oracle” on page 36. |
| Statistics | Displays the change in Oracle statistics for the statements in the last minute. See “Oracle statistics usage within Precise for Oracle” on page 40. |
The following table explains the information that is displayed on the Lock tab in the Association area, when the Sessions Involved in Lock entity is selected.
Table 4- 6 Lock tab information
| Column | Description |
|---|
| Program | Name of the program connected to Oracle. |
| Session ID | ID of the session. |
| In Oracle (Last Minute) | Bar chart showing the In Oracle breakdown for the session. |
| Status | Indicates whether the session is waiting for or holding the lock. |
| type | Transaction type: TX, TM, and so on. This information is derived from the P1 parameter in the V$SESSION_WAIT table. |
| Mode | Transaction mode: Exclusive, Shared, and so on. This information is derived from the P1 parameter in the V$SESSION_WAIT table. |
| ID1 | This information is equivalent to P2 parameter in the V$SESSION_WAIT table. |
| ID2 | This information is equivalent to P3 parameter in the V$SESSION_WAIT table. |
| Object | Locked object, if appropriate. |
| Text | Portion of SQL text for the session being locked. |
About the Statement entity
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The Statement Overview displays general information on a single SQL statement. The following table describes the information displayed in a Statement Overview.
Table 4- 7 Statement Overview
| View area | Description |
|---|
| Statement | Displays information on the following items: - Hash Value. Oracle hash value.
- In Oracle (Sum.). Total time spent In Oracle.
- Opens + Fetches. Number of times sessions opened and fetched from a cursor for this statement.
|
| In Oracle (Last Minute) | - Sub-State. In Oracle sub-state.
- Bar graph. Graphical representation of the Time column.
- Time. Amount of time sessions were in this state.
- %. Percentage of time that sessions were in this state.
- Sessions. Number of sessions in each state. Note a session may be in more than one state during a minute.
|
| Overall Activity (Last Minute) | A pie chart illustrating the overall activity of the statement during the last minute. See “Overall activity” on page 35. |
| Text | The SQL text of the statement. |
About the text of a statement
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The following table describes the information displayed in the Statement Statistics view.
Table 4- 8 Statement Statistics view
| Column | Description |
|---|
| Statistic | Oracle statistic name |
| Value | Statistic value |
| Anchor |
|---|
| HowtheCurrenttabcanhelpyouidentifyperformanceproblems |
|---|
| HowtheCurrenttabcanhelpyouidentifyperformanceproblems |
|---|
|
How the Current tab can help you identify performance problems
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For our example, in the Main area, you can see that the holding session (for Duration) has not run any statements in the last 15-minute time slice, meaning that the UPDATE to the CUSTOMER table (for Program) was executed earlier but that the session has not yet issued a COMMIT to release the row lock.
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