alter system set max_dump_file_size=104857600
scope=spfile;
设置dump件的,默认值为
unlimited,建议设置为
104857600(即100M)。
alter system set parallel_force_local=TRUE scope=spfile;
control_file_record_keep_t
ime
alter system set control_file_record_keep_time=31
scope=spfile;
默认7天,建议控制件中的元
数据保时间设置为31天
alter system set parallel_max_servers=96 scope=spfile;
设置数据库的最并度,新核
系统数据库服务的逻辑cpu
数是96,OLTP系统建议要设置
太。
alter system set parallel_min_servers=0 scope=spfile;
设置数据库实启动时默认启动
的最并进程,新核系统数
据库服务的逻辑cpu数是96
alter system set open_cursors=1000 scope=spfile;
当前值为300,open_cursors参数
于指定个会话能同时打开游
标的最数
alter system set utl_file_dir='/tmp' scope=spfile;
alter system set resource_manager_plan='FORCE:'
scope=spfile;
deferred_segment_creation
alter system set deferred_segment_creation=FALSE
scope=spfile;
档 ID 1590806.1
High Waits on 'library
cache: mutex X'
Inserting into a
Partitioned Table
when
DEFERRED_SEGME
NT_CREATION =
TRUE
fast_start_parallel_rollba
ck
alter system set fast_start_parallel_rollback='LOW'
scope=spfile;
在恢复终事务时,fast_start_parallel_rollback参数于
指定以多少个并度来恢复终事务。
建议设置为LOW,默认值LOW,
FALSE:Parallel rollback is disabled,
LOW:Limits the maximum degree of parallelism to 2 *
CPU_COUNT,
HIGH:Limits the maximum degree of parallelism to 4 *
CPU_COUNT
文档被以下合辑收录
评论