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Oracle 12c cpu usage 90%

edited Dec 17, 2015 9:09AM in SQL Performance (MOSC) 2 commentsAnswered ✓

Hello,

On my oracle 12c server (12.1.0.1) sometimes cpu usage is 90% How can i reduce this usage? I have only 4gb RAM...

Show parameter target result:

archive_lag_target                   integer     0

db_big_table_cache_percent_target    string      0

db_flashback_retention_target        integer     1440

fast_start_io_target                 integer     0

fast_start_mttr_target               integer     0

memory_max_target                    big integer 3056M

memory_target                        big integer 3056M

parallel_servers_target              integer     32

pga_aggregate_target                 big integer 1000M

sga_target                           big integer 2400M

when i try log in then i get

"

ORA-12516: TNS:listener could not find available handler with matching protocol

stack"


so i increase 

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