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217 lines
14 KiB
ReStructuredText
217 lines
14 KiB
ReStructuredText
.. _tabbed_browser:
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***********************
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`Tabbed Browser`:index:
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***********************
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The right pane of the *pgAdmin* window features a collection of tabs that
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display information about the object currently selected in the *pgAdmin* tree
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control in the left window. Select a tab to access information about the
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highlighted object in the tree control.
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.. image:: images/main_dashboard.png
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:alt: Dashboard panel
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:align: center
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The graphs on the *Dashboard* tab provides an active analysis of the usage
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statistics for the selected server or database:
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* The *Server sessions* or *Database sessions* graph displays the interactions
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with the server or database.
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* The *Transactions per second* graph displays the commits, rollbacks, and
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total transactions per second that are taking place on the server or database.
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* The *Tuples in* graph displays the number of tuples inserted, updated, and
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deleted on the server or database.
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* The *Tuples out* graph displays the number of tuples fetched and returned
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from the server or database.
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* The *Block I/O* graph displays the number of blocks read from the filesystem
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or fetched from the buffer cache (but not the operating system's file system
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cache) for the server or database.
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The *Server activity* panel displays information about sessions, locks, prepared
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transactions, and server configuration (if applicable). The information is
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presented in context-sensitive tables. Use controls located above the table to:
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* Click the *Refresh* button to update the information displayed in each table.
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* Enter a value in the *Search* box to restrict the table content to one or more
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sessions that satisfy the search criteria. For example, you can enter a
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process ID to locate a specific session, or a session state (such as *idle*)
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to locate all of the sessions that are in an idle state.
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You can use icons in the *Sessions* table to review or control the state of a
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session:
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* Use the *Terminate* icon (located in the first column) to stop a session and
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remove the session from the table. Before the server terminates the session,
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you will be prompted to confirm your selection.
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* Use the *Cancel* icon (located in the second column) to terminate an active
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query without closing the session. Before canceling the query, the server
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will prompt you to confirm your selection. When you cancel a query, the
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value displayed in the *State* column of the table will be updated from
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*Active* to *Idle*. The session will remain in the table until the session is
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terminated.
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* Use the *Details* icon (located in the third column) to open the *Details*
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tab; the tab displays information about the selected session.
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.. image:: images/main_properties_table.png
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:alt: Properties panel
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:align: center
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The *Properties* tab displays information about the object selected.
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Click the *Delete* icon in the toolbar under the browser tab to delete the
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selected objects in the Properties panel.
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Click the *Drop Cascade* icon in the toolbar under the browser tab to delete the
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selected objects and all dependent objects in the Properties panel.
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.. image:: images/main_properties_icons.png
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:alt: Object editor icon
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:align: center
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Click the *Edit* icon in the toolbar under the browser tabs to launch the
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*Properties* dialog for the selected object.
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To preserve any changes to the *Properties* dialog, click the *Save* icon; your
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modifications will be displayed in the updated *Properties* tab.
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.. image:: images/main_properties_edit.png
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:alt: Object editor window
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:align: center
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Details about the object highlighted in the tree control are displayed in one or
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more collapsible panels. You can use the arrow to the left of each panel label
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to open or close a panel.
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.. image:: images/main_sql.png
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:alt: SQL panel
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:align: center
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The *SQL* tab displays the SQL script that created the highlighted object, and
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when applicable, a (commented out) SQL statement that will *DROP* the selected
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object. You can copy the SQL statements to the editor of your choice using cut
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and paste shortcuts.
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.. image:: images/main_statistics.png
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:alt: Statistics panel
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:align: center
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The *Statistics* tab displays the statistics gathered for each object on the
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tree control; the statistics displayed in the table vary by the type of object
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that is selected. Click a column heading to sort the table by the data displayed
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in the column; click again to reverse the sort order. The following table lists
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some of the statistics that are available:
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.. table::
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:class: longtable
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:widths: 1 4
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| Panel | Description |
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+============================+============================================================================================================+
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| *PID* | The process ID associated with the row. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *User* | The name of the user that owns the object. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Database* | displays the database name. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Backends* | displays the number of current connections to the database. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Backend start* | The start time of the backend process. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Xact Committed* | displays the number of transactions committed to the database within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Xact Rolled Back* | displays the number of transactions rolled back within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Blocks Read* | displays the number of blocks read from memory (in megabytes) within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Blocks Hit* | displays the number of blocks hit in the cache (in megabytes) within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Tuples Returned* | displays the number of tuples returned within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Tuples Fetched* | displays the number of tuples fetched within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Tuples Inserted* | displays the number of tuples inserted into the database within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Tuples Updated* | displays the number of tuples updated in the database within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Tuples Deleted* | displays the number of tuples deleted from the database within the last week. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Last statistics reset* | displays the time of the last statistics reset for the database. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Tablespace conflicts* | displays the number of queries canceled because of recovery conflict with dropped tablespaces in database. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Lock conflicts* | displays the number of queries canceled because of recovery conflict with locks in database. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Snapshot conflicts* | displays the number of queries canceled because of recovery conflict with old snapshots in database. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Bufferpin conflicts* | displays the number of queries canceled because of recovery conflict with pinned buffers in database. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Temporary files* | displays the total number of temporary files, including those used by the statistics collector. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Size of temporary files* | displays the size of the temporary files. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Deadlocks* | displays the number of queries canceled because of a recovery conflict with deadlocks in database. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Block read time* | displays the number of milliseconds required to read the blocks read. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Block write time* | displays the number of milliseconds required to write the blocks read. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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| *Size* | displays the size (in megabytes) of the selected database. |
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+----------------------------+------------------------------------------------------------------------------------------------------------+
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.. image:: images/main_dependencies.png
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:alt: Dependencies panel
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:align: center
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The *Dependencies* tab displays the objects on which the currently selected
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object depends. If a dependency is dropped, the object currently selected in
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the pgAdmin tree control will be affected. To ensure the integrity of the entire
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database structure, the database server makes sure that you do not accidentally
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drop objects that other objects depend on; you must use the DROP CASCADE command
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to remove an object with a dependency.
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The *Dependencies* table displays the following information:
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* The *Type* field specifies the parent object type.
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* The *Name* field specifies the identifying name of the parent object.
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* The *Restriction* field describes the dependency relationship between the
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currently selected object and the parent:
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* If the field is *auto*, the selected object can be dropped separately from
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the parent object, and will be dropped if the parent object is dropped.
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* If the field is *internal*, the selected object was created during the
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creation of the parent object, and will be dropped if the parent object
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is dropped.
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* If the field is *normal*, the selected object can be dropped without
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dropping the parent object.
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* If the field is *blank*, the selected object is required by the system,
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and cannot be dropped.
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.. image:: images/main_dependents.png
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:alt: Dependents panel
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:align: center
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The *Dependents* tab displays a table of objects that depend on the object
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currently selected in the *pgAdmin* browser. A dependent object can be dropped
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without affecting the object currently selected in the *pgAdmin* tree control.
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* The *Type* field specifies the dependent object type.
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* The *Name* field specifies the identifying name for the dependent object.
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* The *Database* field specifies the database in which the object resides.
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.. image:: images/main_query_tool.png
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:alt: Query tool panel
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:align: center
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Additional tabs open when you access the extended functionality offered by
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pgAdmin tools (such as the Query tool, Debugger, or SQL editor). Use the close
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icon (X) located in the upper-right corner of each tab to close the tab when you
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are finished using the tool. Like permanent tabs, these tabs may be repositioned
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in the pgAdmin client window.
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By default, each time you open a tool, pgAdmin will open a new browser tab. You
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can control this behavior by modifying the *Display* node of the *Preferences*
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dialog for each tool. To open the *Preferences* dialog, select *Preferences*
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from the *File* menu.
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