Shared pool is important memory structure in Oracle database system global area SGA. Whenever we parse a query, the parsed representation is cached there and it is shared also. Oracle check for the query first in the shared pool before parsing an entire query, if it finds the parse copy cached, it does not perform that work again and this is significant saving for the CPU and time. In short, it has these areas. It also holds stored trigger code. SQL Plan should not change as a result of flushing shared pool, however hard parsing will be done for the sqls.
Make Yahoo your home page. Statistics should be updated as soon as possible. Check it. The tables on which the problem code affects are not used prior to execution of the program, so why would stats need to be gathered on these tables if DML has not been conducted on the tables?
Hi, You should calm down , too many questions repeated here. I would like to help you really but you need to do some tests based on what I have recommended earlier. I would gladly answer all of your questions after you performed the above test. Moreover there are scripts to calcualte the size of used shared pool, do that before and after changing the value of cursor sharing to force and you would see that the shared pool usage drops almost half depending on how much inefficient code exists.
Therefore please do the above and let me know the results. Do not worry, i will also ask you later to enable trace and run the program with it and provide me the output, and we can see in details.
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Viewed 4k times. In my company they teach me that I've to execute directly in the server that command, but I think is just a command that goes for the network and just a message that is flushed I think that shouldn't be substantial differente how it happens with lot of data, I'm talking of a system that take about 5 minutes approximately to flush The second, how can I flush a instance from another instance?
Abdel P. You make it sound like running that command is something you do regularly. But you or the DBA actually really should only run that command under very extreme circumstances only. I really hope you're not doing that in production, as it's basically a performance killer.
A log switch occurs when one online redo log has been filled and the next online redo log is going to be filled. A log switch always triggers a checkpoint. Flush Buffer Cache Use the following statement to flush the buffer cache.
The latest SCN is also written to the controlfiles.
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