ASP.NET PDF Viewer using C#, VB/NET

ops$tkyte%ORA11GR2> alter session set workarea_size_policy=manual; Session altered. ops$tkyte%ORA11GR2> alter session set sort_area_size = &1; old 1: alter session set sort_area_size = &1 new 1: alter session set sort_area_size = 65536 Session altered. ops$tkyte%ORA11GR2> prompt run @reset_stat &SID and @watch_stat in another session here! run @reset_stat 133 and @watch_stat in another session here! ops$tkyte%ORA11GR2> pause We can see the SID of this new session (133), and we ve set our PGA memory management to manual and our SORT_AREA_SIZE to 65,536 (64KB). Now the script tells us to run the two other scripts in another session, so we ll do that: ops$tkyte%ORA11GR2> @reset_stat 133 Table dropped. Table created. PL/SQL procedure successfully completed. ops$tkyte%ORA11GR2> @watch_stat 6 rows merged. NAME KBYTES_WRITES DIFF_KBYTES_WRITES --------------------------------------------- ------------- -----------------physical reads direct temporary tablespace 0 0 physical writes direct temporary tablespace 0 0 session pga memory 673 session pga memory max 673 session uga memory 300 session uga memory max 300 6 rows selected.

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3. The DoWork event handler is executed in the worker thread and computes the 1000th Fibonacci number. At the end of the computation, the result is written into args.Result, a mutable storage location in the event arguments for the DoWork event. The DoWork event handler then completes. 4. At some point after the DoWork event handler completes, the RunWorkerCompleted event is automatically raised on the main application thread. This displays a message box with the result of the computation, retrieved from the args field of the event arguments.

Note The watch_stat script must be run in the same session as the reset_stat script; reset_stat sets the

:sid bind variable necessary for the MERGE statement. Alternatively, you can execute exec :sid := <sid>, where <sid> is the SID you observe in your testing.

RunWorkerAsync: unit -> unit CancelAsync: unit -> unit CancellationPending: bool WorkerReportsProgress: bool WorkerSupportsCancellation: bool

So, before we begin we can see that we have about 300KB of data in the UGA and 673KB of data in the PGA. The first question is, How much memory are we using between the PGA and UGA That is, are we using 300KB + 673KB of memory, or are we using some other amount This is a trick question, and one that you can t answer unless you know whether the monitored session with SID 133 was connected to the database via a dedicated server or a shared server and even then it might be hard to figure out. In dedicated server mode, the UGA is totally contained within the PGA, in which case we would be consuming 673KB of memory in our process or thread. In shared server mode, the UGA is allocated from the SGA, and the PGA is in the shared server. So, in shared server mode, by the time we get the last row from the preceding query, the shared server process may be in use by someone else. That PGA isn't "ours" anymore, so technically we are using 300KB of memory (except when we are actually running the query, at which point we are using 973KB of memory between the combined PGA and UGA). In this case, I used a dedicated server (it would be impossible to do the test accurately otherwise) and we are using a grand total of 673KB of memory in the combined PGA and UGA. So, let's now run the first big query in session 133, which is using manual PGA memory management in dedicated server mode. We just have to go back to that session where we ran run_query.sql and hit enter to start the query running:

Note Since we haven't set a SORT_AREA_RETAINED_SIZE, its reported value will be zero, but its used value will

Starts the process on a separate thread asynchronously. Called from the main thread. Set the CancellationPending flag of the background task. Called from the main thread. Set to true by raising CancelAsync. Used by the worker thread. Set to true if the worker can support progress updates. Used by the main thread. Set to true if the worker can support cancellation of the current task in progress. Used by the main thread. Indicate the progress of the operation. Used by the worker thread. Fires in response to a call to RunWorkerAsync. Invoked on the worker thread. Fires when the background operation is canceled, when the operation is completed, or when an exception is thrown. Invoked on the main thread. Fires whenever the ReportProgress property is set. Invoked on the main thread.