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Real-Time SQL Monitoring reports are available from three locations:
SQL_ID of interest to display the SQL monitoring report.In this article I will demonstrate the use of the DBMS_SQLTUNE package to display SQL monitoring reports without using Enterprise Manager or SQL Developer. This article has been updated to include additional functionality
introduced in Oracle 11g Release 2.
Related articles.
Oracle 11g automatically monitors SQL statements if they are run in parallel, or consume 5 or more seconds of CPU or I/O in a single execution. This allows resource intensive SQL to be monitored as it is executing, as well as giving access to detailed information about queries once they are complete.
SQL monitoring requires the STATISTICS_LEVEL parameter to be set to ‘TYPICAL‘ or ‘ALL‘, and the CONTROL_MANAGEMENT_PACK_ACCESS parameter set to ‘DIAGNOSTIC+TUNING‘.
SQL> CONN / AS SYSDBA Connected. SQL> SHOW PARAMETER statistics_level NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ statistics_level string TYPICAL SQL> SHOW PARAMETER control_management_pack_access NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ control_management_pack_access string DIAGNOSTIC+TUNING SQL>
The MONITOR hint switches on SQL monitoring for statements that would not otherwise initiate it.
SELECT /*+ MONITOR */ d.dname, WM_CONCAT(e.ename) AS employees
FROM emp e
JOIN dept d ON e.deptno = d.deptno
GROUP BY d.dname
ORDER BY d.dname;
The REPORT_SQL_MONITOR function is used to return a SQL monitoring report for a specific SQL statement. The SQL statement can be identified using a variety of parameters, but it will typically be identified using the SQL_ID parameter.
The function can accept many optional parameters, shown here, but most of the time you will probably only use the following.
SQL_ID - The SQL_ID of the query of interest. When NULL (the default) the last monitored statement is targeted.SQL_EXEC_ID - When the SQL_ID is specified, the SQL_EXEC_ID indicates the individual execution of interest. When NULL (the default) the most recent execution of the statement targeted by the SQL_ID is
assumed.REPORT_LEVEL - The amount of information displayed in the report. The basic allowed values are ‘NONE‘, ‘BASIC‘, ‘TYPICAL‘ or ‘ALL‘, but the information displayed can be modified further by adding (+) or subtracting (-) named report sections
(eg. ‘BASIC +PLAN +BINDS‘ or ‘ALL -PLAN‘). This is similar to the way DBMS_XPLAN output can be tailored in the later releases. I almost always use ‘ALL‘.TYPE - The format used to display the report (‘TEXT‘, ‘HTML‘, ‘XML‘ or ‘ACTIVE‘). The ‘ACTIVE‘ setting is new to Oracle 11g Release 2 and displays the output using HTML and Flash, similar to the way it is shown in Enterprise Manager.SESSION_ID - Targets a subset of queries based on the specified SID. Use SYS_CONTEXT(‘USERENV‘,‘SID‘) for the current session.The report accesses several dynamic performance views, so you will most likely access it from a privileged user, or a user granted the SELECT_CATALOG_ROLE role.
To see it in action, first we make sure we have a monitored statement to work with.
CONN scott/tiger
SELECT /*+ MONITOR */ d.dname, WM_CONCAT(e.ename) AS employees
FROM emp e
JOIN dept d ON e.deptno = d.deptno
GROUP BY d.dname
ORDER BY d.dname;
Monitored statements can be identified using the V$SQL_MONITOR view. This view was present in Oracle 11g Release 1, but has additional columns in Oracle 11g Release 2, making it much more useful. It contains an entry for
each execution monitored, so it can contain multiple entries for individual SQL statements.
CONN / AS SYSDBA
-- 11gR1
SELECT sql_id, status
FROM v$sql_monitor;
SQL_ID STATUS
------------- -------------------
526mvccm5nfy4 DONE (ALL ROWS)
SQL>
-- 11gR2
SET LINESIZE 200
COLUMN sql_text FORMAT A80
SELECT sql_id, status, sql_text
FROM v$sql_monitor
WHERE username = ‘SCOTT‘;
SQL_ID STATUS SQL_TEXT
------------- ------------------- --------------------------------------------------------------------------------
526mvccm5nfy4 DONE (ALL ROWS) SELECT /*+ MONITOR */ d.dname, WM_CONCAT(e.ename) AS employees
FROM emp e
JOIN dept d ON e.deptno = d.deptno
GROUP BY d.dname
ORDER BY d.dname
SQL>
Once the SQL_ID is identified, we can generate a report using the REPORT_SQL_MONITOR function.
SET LONG 1000000 SET LONGCHUNKSIZE 1000000 SET LINESIZE 1000 SET PAGESIZE 0 SET TRIM ON SET TRIMSPOOL ON SET ECHO OFF SET FEEDBACK OFF SPOOL /host/report_sql_monitor.htm SELECT DBMS_SQLTUNE.report_sql_monitor( sql_id => ‘526mvccm5nfy4‘, type => ‘HTML‘, report_level => ‘ALL‘) AS report FROM dual; SPOOL OFF
Examples of the output for each available TYPE are displayed below.
BASE_PATH parameter in the function call to identify their location.The REPORT_SQL_MONITOR_LIST function was added in Oracle 11g Release 2 to generate a summary screen, similar to that on the "Monitored SQL Executions" page of Enterprise Manager. There are a number of parameters to filer
the content of the report (shown here), but most of the time you will probably only use the TYPE and REPORT_LEVEL parameters,
similar to those in the REPORT_SQL_MONITOR function. The query below shows how the function can be used.
SET LONG 1000000 SET LONGCHUNKSIZE 1000000 SET LINESIZE 1000 SET PAGESIZE 0 SET TRIM ON SET TRIMSPOOL ON SET ECHO OFF SET FEEDBACK OFF SPOOL /host/report_sql_monitor_list.htm SELECT DBMS_SQLTUNE.report_sql_monitor_list( type => ‘HTML‘, report_level => ‘ALL‘) AS report FROM dual; SPOOL OFF
Examples of the output for each available TYPE are displayed below.
BASE_PATH, suggest it will be supported in future.Although not documented as part of Real-Time SQL Monitoring, the REPORT_SQL_DETAIL function added in Oracle 11g Release 2 returns a report containing SQL monitoring information. Once again, it has several parameters (shown
here), but you will probably only use a subset of them to target specific SQL statements, as shown below.
SET LONG 1000000 SET LONGCHUNKSIZE 1000000 SET LINESIZE 1000 SET PAGESIZE 0 SET TRIM ON SET TRIMSPOOL ON SET ECHO OFF SET FEEDBACK OFF SPOOL /host/report_sql_detail.htm SELECT DBMS_SQLTUNE.report_sql_detail( sql_id => ‘526mvccm5nfy4‘, type => ‘ACTIVE‘, report_level => ‘ALL‘) AS report FROM dual; SPOOL OFF
Examples of the output for each available TYPE are displayed below.
As mentioned previously, by default Active HTML available in 11gR2 require a download of Javascript libraries and a Flash movie from an Oracle website, so must be used on a PC connected to the internet. An alternative to this is to
download the relevant files to a HTTP server on your network (or local machine) and use the BASE_PATH parameter to reference those files rather than the Oracle website.
To show this I will create a new directory under a HTTP server on my network and download the relevant files to it.
mkdir -p /var/www/html/sqlmon cd /var/www/html/sqlmon wget --mirror --no-host-directories --cut-dirs=1 http://download.oracle.com/otn_software/emviewers/scripts/flashver.js wget --mirror --no-host-directories --cut-dirs=1 http://download.oracle.com/otn_software/emviewers/scripts/loadswf.js wget --mirror --no-host-directories --cut-dirs=1 http://download.oracle.com/otn_software/emviewers/scripts/document.js wget --mirror --no-host-directories --cut-dirs=1 http://download.oracle.com/otn_software/emviewers/sqlmonitor/11/sqlmonitor.swf
When calling functions in the DBMS_SQLTUNE package, I use the BASE_PATH parameter with the value of "http://192.168.0.4/sqlmon" so the active report will use the local copies of the files, rather than accessing
them from the internet.
SET LONG 1000000 SET LONGCHUNKSIZE 1000000 SET LINESIZE 1000 SET PAGESIZE 0 SET TRIM ON SET TRIMSPOOL ON SET ECHO OFF SET FEEDBACK OFF SPOOL /host/report_sql_monitor.htm SELECT DBMS_SQLTUNE.report_sql_monitor( sql_id => ‘526mvccm5nfy4‘, type => ‘ACTIVE‘, report_level => ‘ALL‘, base_path => ‘http://192.168.0.4/sqlmon‘) AS report FROM dual; SPOOL OFF
The SQL monitoring functionality accesses a number of existing views, but two new dynamic performance views have been added specifically as part of it.
For more information see:
Real-Time SQL Monitoring using DBMS_SQLTUNE
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原文地址：http://blog.csdn.net/ora_unix/article/details/40584007
