《tempfile真正文件号》的评论

作者：惜分飞

惜分飞 — Tue, 06 Mar 2012 05:05:09 +0000

jyc, 新增加个tempfile文件测试 [sql] SQL> select file#,rfile#,name from v$tempfile; FILE# RFILE# NAME ---------- ---------- ----------------------------------- 1 1 /opt/oracle/oradata/chf/temp01.dbf SQL> select TFAFN,TFNUM from X$KCCTF; TFAFN TFNUM ---------- ---------- 301 1 SQL> show parameter db_files; NAME TYPE VALUE ------------------------------------ ----------- -------------- db_files integer 300 SQL> alter tablespace temp add tempfile 2 '/opt/oracle/oradata/chf/temp02.dbf' size 10m; Tablespace altered. SQL> select file#,rfile#,name from v$tempfile; FILE# RFILE# NAME ---------- ---------- ----------------------------------- 1 1 /opt/oracle/oradata/chf/temp01.dbf 2 2 /opt/oracle/oradata/chf/temp02.dbf SQL> select TFAFN,TFNUM from X$KCCTF; TFAFN TFNUM ---------- ---------- 301 1 302 2 [/sql]

作者：jyc

jyc — Tue, 06 Mar 2012 00:58:03 +0000

惜分飞, 原来已存在临时文件号是否改变？添加新的临时文件后，文件号是什么？

作者：jyc

jyc — Tue, 06 Mar 2012 00:56:30 +0000

建议增加如下测试：更改了db_files参数值。
然后1.再创建临时文件，看看文件号的结果
2.重新创建临时表空间，看看文件号的结果。

作者：惜分飞

惜分飞 — Mon, 05 Mar 2012 14:11:52 +0000

进一步验证猜测


SQL> select TFAFN,TFNUM from X$KCCTF;

     TFAFN      TFNUM
---------- ----------
       201          1
SQL> alter system set db_files=300 scope=spfile;

System altered.

SQL> startup force;
ORACLE instance started.

Total System Global Area  622149632 bytes
Fixed Size                  2230912 bytes
Variable Size             415237504 bytes
Database Buffers          197132288 bytes
Redo Buffers                7548928 bytes
Database mounted.
Database opened.
SQL> select TFAFN,TFNUM from X$KCCTF;

     TFAFN      TFNUM
---------- ----------
       301          1