oracle内存参数调整

32G物理内存参考参数：

alter system set sga_max_size=22G scope=spfile sid='*';
alter system set sga_target=22G scope=spfile sid='*';
alter system set db_cache_size=14G scope=spfile sid='*';
alter system set shared_pool_size=6G scope=spfile sid='*';
alter system set pga_aggregate_target=2G scope=spfile sid='*';
alter system set dml_locks=12000 scope=spfile  sid='*';
alter system  set optimizer_index_caching=90 scope=both sid='*';
alter system  set optimizer_index_cost_adj=50 scope=both sid='*';
alter system  set open_cursors=3000 scope=both sid='*';
alter system  set processes=1200 scope=spfile sid='*';
alter system set "_b_tree_bitmap_plans"=FALSE scope=both sid='*';
alter system set "_complex_view_merging"=TRUE scope=both sid='*';
alter system set "_no_or_expansion"=TRUE scope=both sid='*';
alter system set "_optimizer_cost_based_transformation"=on scope=both sid='*';
alter system set "_pred_move_around"=FALSE scope=both sid='*';