Simple .NET/ASP.NET PDF document editor web control SDK

GO Make sure that the login you just created has the UNSAFE ASSEMBLY permission: GRANT UNSAFE ASSEMBLY TO [MyStrongNamedAssemblies] GO Once you have created the login, you are able to create a new unverifiable assembly in your database: USE pubs GO IF EXISTS (SELECT * FROM sys.assemblies WHERE name=N'MyUnverifiableAssembly') DROP ASSEMBLY MyUnverifiableAssembly GO CREATE ASSEMBLY [MyUnverifiableAssembly] FROM 'c:\ MyUnverifiableAssembly.dll' WITH PERMISSION_SET=UNSAFE GO Keep in mind that you can only add assemblies created with /clr:pure. If you try to install an assembly that was compiled with /clr, the following error message will occur: "CREATE ASSEMBLY for assembly 'MyUnverifiableAssembly' failed because assembly 'MyUnverifiableAssembly' failed verification. Check if the referenced assemblies are up-to-date and trusted (for external_access or unsafe) to execute in the database. CLR Verifier error messages if any will follow this message."

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The DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL procedure has three parameters, but you can leave out the UNIT_SIZE and the REFNO (relative file number) parameters in most cases.

The DBMS_PROFILER package lets you gather performance data on your applications. Each time your PL/SQL code executes in the database, performance data is stored in database tables. You start the profiler, run your PL/SQL code, and stop the profiler. Repeated executions of several variations of the code will give you a good idea about where your performance problems lie.

As programs get larger and more complex, and developers are seriously in pursuit of fulfilling the functional specifications, code performance becomes harder to improve. The DBMS_PROFILER package helps you catch inefficient PL/SQL code and eliminate bottlenecks in your code. All you need to do to take advantage of the DBMS_PROFILER package is the following: Enable the profiler data collection. Execute the test code. Analyze the profiler data and trap inefficient code. Execute new code until performance meets acceptable standards.

The vsize monitor is as simple as the percent-CPU monitor. We obtain the current process s memory footprint directly from the ps output.

DBMS_PROFILER is a useful package for DBAs, but it isn t automatically created when you run the catalog.sql and catproc.sql scripts after installing the database. You need to run a special installation script manually, as shown in Listing 24-16. The example here shows the execution of the script on a Windows server. On a UNIX system, the script is located in the /$ORACLE_HOME/rdbms/ admin directory. You need to be logged in as the user SYS to execute this script. Listing 24-16. Installing the Profiler SQL> SHO USER USER is "SYS" SQL> @c:\oracle\rdbms\admin\profload.sql Package created. Grant succeeded. Synonym created. Library created. Package body created. Testing for correct installation SYS.DBMS_PROFILER successfully loaded. PL/SQL procedure successfully completed. SQL>

Once you have created the DBMS_PROFILER package, grant the execute privilege on it to the user who needs to use the package, as shown here (you can also grant the privilege to PUBLIC if you wish): SQL> GRANT EXECUTE ON dbms_profiler TO oe; Grant succeeded. SQL> Next, log in as user oe and execute the proftab.sql script, which is located in the $ORACLE_ HOME/rdbms/admin directory. This creates the necessary tables in user oe s schema, where the performance details of the PL/SQL code runs can be stored. The following code shows the results of the script execution by user oe: SQL> CONNECT oe/oe@manager Connected. SQL> @c:\oraclent\rdbms\admin\proftab.sql drop table plsql_profiler_data cascade constraints

. . . Table created. Comment created. . . . Sequence created. SQL> You execute the DBMS_PROFILER.START_PROFILER procedure to start the profiling session and the DBMS_PROFILER.STOP_PROFILER procedure to stop the collection of performance data. The profiler shows the number of times each line of your code was executed and the total amount of time taken to execute each line. You can also find out the minimum and maximum times taken to execute each line. Armed with such information, you can quickly get an idea about where the performance bottlenecks are in your code. For example, you may find that using bulk binds might improve the code performance figures tremendously. Listing 24-17 shows the main procedures and functions that are part of the DBMS_PROFILER package. Listing 24-17. The DBMS_PROFILER Package SQL> DESC dbms_profiler Argument Name Type ------------------------------ -------------PROCEDURE FLUSH_DATA /* Flushes the performance data to the storage tables*/ PROCEDURE START_PROFILER /* Starts the profiler */ RUN_COMMENT VARCHAR2 RUN_COMMENT1 VARCHAR2 RUN_NUMBER BINARY_INTEGER PROCEDURE STOP_PROFILER /* Stops the profiler */ SQL> In/Out Default ------ --------