Performance problems on a Oracle 11G with Windows 2008 64bits.

Hi everyone,
I have noticed that our db is going low and low every week. My server has 16GB RAM and 10GB are dedicated to the Oracle database, this is a 11.2.0.1 with Windows 2008 R2 SP1 64bits. I like to know acording to the nexts values what you guys recommend to adjust in the init.ora:
orcl.__db_cache_size=5402263552
orcl.__java_pool_size=33554432
orcl.__large_pool_size=33554432
orcl.__pga_aggregate_target=3657433088
orcl.__sga_target=6878658560
orcl.__shared_io_pool_size=0
orcl.__shared_pool_size=1308622848
orcl.__streams_pool_size=33554432
*.memory_target=10511974400
*.open_cursors=5000
*.optimizer_mode='RULE'
*.processes=300
Acording to the memory target on how values can be increased the processes, pga_agregate_target, etc.
Also we have problems related to the bug Bug 9593134 that “Connections to Oracle 11g are slow and can take anywhere from 10 seconds to 2 minutes.” there is a fix on linux by removing the dns names on it but anyone have experience on windows platforms?
Thanks for all and sorry for my english.
Regards.
Arturo.

Regarding the long connection times, have you tried using network packet capture software (such as Wireshark) to determine what the client computer is doing when a connection attempt is initiated?
The Oracle Database time model statistics, along with the system wide wait events may help you diagnose the non-connection related performance issues (you should not just look at the statistics, but instead capture the current values, wait a period of time, capture the statistics again, and compare the changes in the statistic values). A statspack report might also help you - but a 10046 trace at level 8 or 12 is more appropriate if you are able to identify a couple of sessions that experience performance problems.
I do not suggest just blindly modifying parameters, although I am curious to know:
* Why the session level parameter OPEN_CURSORS is set to 5000 - do you expect a single session to hold open 5,000 cursors?
* Why are you using the deprecated RULE based optimizer?
* Why is the MEMORY_TARGET parameter used when the SGA_TARGET and PGA_AGGREGATE target are specified?
Charles Hooper
http://hoopercharles.wordpress.com/
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.

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