Oracle DBWR触发条件

通过以下视图可以看到DBWR进程写出block的触发条件

引用

SQL> select name,value from v$sysstat where name like 'DBWR%';

NAME                                                                  VALUE
---------------------------------------------------------------- ----------
DBWR checkpoint buffers written                                        8173
DBWR thread checkpoint buffers written                                 5415
DBWR tablespace checkpoint buffers written                                0
DBWR parallel query checkpoint buffers written                            0
DBWR object drop buffers written                                          0
DBWR transaction table writes                                            40
DBWR undo block writes                                               106815
DBWR revisited being-written buffer                                       0
DBWR make free requests                                                   0
DBWR lru scans                                                            0
DBWR checkpoints                                                          6
DBWR fusion writes                                                        0

12 rows selected.

数据库版本为

引用

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod
PL/SQL Release 10.2.0.3.0 - Production
CORE    10.2.0.3.0      Production
TNS for Linux: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production