【1】pfile：初始化参数文件
包含了init.ora文件，该文件定义了几个非常重要的参数：
·db_domain：数据库域名
·db_name：数据库名
·control_files：控制文件的路径，通常有3个文件
·shared_pool_size=共享池的大小
·background_dump_dest=后台进程日志、跟踪文件路径
·core_dump_dest=操作系统崩溃的日志、跟踪文件路径
·user_dump_dest=用户进程的跟踪文件路径
【2】budmp：存放由后台进程所生成的数据库Alert日志文件和跟踪文件
典型的包含了一个.log文件和一个.trc文件。
打开.log文件我们可以看到里面有很多后台进程的启动及运行信息，其中最关键的就是加载init.ora文件和起点后台进程的日志了
Starting up ORACLE RDBMS Version: 9.2.0.1.0.
System parameters with non-default values:
processes = 150
timed_statistics = TRUE
shared_pool_size = 50331648
large_pool_size = 8388608
java_pool_size = 33554432
control_files = C:\oracle\oradata\paullin\control01.ctl, C:\oracle\oradata\paullin\control02.ctl, C:\oracle\oradata\paullin\control03.ctl
db_block_size = 8192
db_cache_size = 25165824
compatible = 9.2.0.0.0
db_file_multiblock_read_count= 16
fast_start_mttr_target = 300
undo_management = AUTO
undo_tablespace = UNDOTBS1
undo_retention = 10800
remote_login_passwordfile= EXCLUSIVE
db_domain =
instance_name = paullin
dispatchers = (PROTOCOL=TCP)
job_queue_processes = 10
hash_join_enabled = TRUE
background_dump_dest = C:\oracle\admin\paullin\bdump
user_dump_dest = C:\oracle\admin\paullin\udump
core_dump_dest = C:\oracle\admin\paullin\cdump
sort_area_size = 524288
db_name = paullin
open_cursors = 300
star_transformation_enabled= FALSE
query_rewrite_enabled = FALSE
pga_aggregate_target = 25165824
aq_tm_processes = 1
PMON started with pid=2
DBW0 started with pid=3
LGWR started with pid=4
CKPT started with pid=5
SMON started with pid=6
RECO started with pid=7
CJQ0 started with pid=8
QMN0 started with pid=9
而.trc文件里面则保存了当前会话的ID
【3】cdump：存放发生崩溃的操作系统的系统进程信息
【4】create：存储创建数据库的SQL脚本
【5】udmp：存储用户进程所生成的跟踪文件
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生活就像打牌，不是要抓一手好牌，而是要尽力打好一手烂牌。
posted on 2008-05-04 17:41
Paul Lin 阅读(560)
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