We will have a policy of distributing the total memory set by MEMORY_TARGET parameter in a fixed ratio to the the SGA and PGA during initialization.

Also why is shared_pool_size set if you are using automatic shared memory management? By clicking “Post Your Answer”, you agree to our To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Learn from thousands of experts, get answers to your questions and share knowledge with peers.I'm not sure if I'm posting this in the right location, but here goes!We have a server with an installation of oracle 11g on it that was setup incorrectly. It doesn't raise an error here (but indeed a restart is necessary), but I'm testing on 12c so maybe it's required in 11.2.Actually no error is raised and your statement works in 11r2 too.

This Article for newbe Oracle DBA Since If you trying to change sga on rac with wrong way , spfile maybe be corrupted .

The memory_target parameter specifies the amount of shared memory available for Oracle to use when dynamically controlling the SGA and PGA. Even restarting the database just resets the parameter back to it's original value.You can't change sga_max_size without setting sga_target as well if sga_target is set to the same value as sga_max_size. Please type your message and try again. The Overflow Blog Register and Participate in Oracle's online communities.

Learn more about Stack Overflow the company SQL> show sga Total System Global Area 1577058304 bytes Fixed Size 8793208 bytes Variable Size 385876872 bytes Database Buffers 1174405120 bytes Redo Buffers 7983104 bytes SQL> show parameter sga_ NAME TYPE VALUE ----- ----- ----- sga_max_size big integer 1504M sga_min_size big integer 0 sga_target big integer 1504M For example, server RAM is 10 GB, SGA_MAX_SIZE is 5 GB and SGA_TARGET is 3 GB. Start here for a quick overview of the site

Database Administrators Stack Exchange works best with JavaScript enabled Stack Exchange network consists of 177 Q&A communities including It seems that the memory that was allocated to it is too high.db_cache_size                        big integer 17280Mhash_area_size                       integer     131072pga_aggregate_target                 big integer 24014235893result_cache_max_size                big integer 176960Ksga_max_size                         big integer 35712Mshared_pool_reserved_size            big integer 864Mshared_pool_size                     big integer 17280MWe've been trying to lower some of these values, but it's not working.We have multiple db's on the same server and we are trying to lower the settings to match those. You should probably set the sga and shared pool parameters as shown below:alter system set sga_max_size = 3344M scope=spfile;alter system set shared_pool_size=1632M scope=spfile;  <== should probably be set to 0 if you're using automatic shared memory managementthen restart the database.

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La valeur du paramètre SGA_TARGET contient la taille souhaitée de la SGA.

The settings we want are:db_cache_size                        big integer 1632Mhash_area_size                       integer     131072pga_aggregate_target                 big integer 2160Mresult_cache_max_size                big integer 16736Ksga_max_size                         big integer 3344Mshared_pool_reserved_size            big integer 85563801shared_pool_size                     big integer 1632MThe problem is that when we try to run the alter statement to lower any of these settings, it doesn't apply.

By using our site, you acknowledge that you have read and understand our Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Anybody can answer SGA_MAX_SIZE >= SGA_TARGET. Node One : ORCL1Node Two : ORCL2Note : You Need To Check Memory Parameter On Database , if its Have Available Size . You should probably set the sga and shared pool parameters as shown below: alter system set sga_max_size = 3344M scope=spfile; alter system set sga_target = 3344M scope=spfile; alter system set shared_pool_size=1632M scope=spfile; <== should probably be set to 0 if you're using automatic shared memory management then restart the database.

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