细节行的工作总量完成后，会把完成进度加到聚合行。在备份过程中每次执行该视图看到细节行的%_complete在增长，而聚合行的%_complete却不会每次随着查询二改变就是这个原因。
备份器件还要关注一下sofar的增长量，如果隔2分钟以上查询该视图发现sofar停止增长了，就应该关注一下v$session_wait视图看看RMAN回话在等待什么事件。
我们看看第二天早上的备份进度，一夜都没备份完
oracle@jccmsdb1:/home/oracle> bdf /orabak
Filesystem kbytes used avail %used Mounted on
/dev/vx/dsk/bakdg/bakvol
9961472000 872303704 9018159296 9% /orabak
SQL> /
SID SERIAL# OPNAME TARGET_DESC HOURS CONTEXT SOFAR TOTALWORK %_complete
---------- ---------- ----------------------------------- --------------- ---------- ---------- ---------- ---------- ----------
6050 62853 RMAN: full datafile backup Set Count 3.25861111 1 95604078 136896374 69.84
6440 52989 RMAN: full datafile backup Set Count 2.95 1 97688238 136890366 71.36
1548 52825 RMAN: aggregate input backup 58.1516667 3 229714732 1232568339 18.64
3058 52919 RMAN: full datafile backup Set Count 3.08333333 1 98322032 136919040 71.81
3806 34287 RMAN: full datafile backup Set Count 4.92305556 1 82772078 136895998 60.46
oracle@jccmsdb1:/home/oracle> ls -ltr /orabak
total 1719089792
drwxr-xr-x 2 root root 96 Oct 10 18:40 lost+found
-rw-r----- 1 oracle oinstall 98304 Oct 12 10:31 datafile6_ptpks4no_1_1.bak
-rw-r----- 1 oracle oinstall 21472854016 Oct 12 18:29 sh_db_full_q5pksqkh_1_1
-rw-r----- 1 oracle oinstall 21472911360 Oct 12 18:32 sh_db_full_q3pksqkf_1_1
-rw-r----- 1 oracle oinstall 21472804864 Oct 12 18:37 sh_db_full_q2pksqke_1_1
-rw-r----- 1 oracle oinstall 21472837632 Oct 12 18:41 sh_db_full_q4pksqkg_1_1
-rw-r----- 1 oracle oinstall 21472772096 Oct 12 20:11 sh_db_full_q5pksqkh_2_1
-rw-r----- 1 oracle oinstall 21472862208 Oct 12 20:15 sh_db_full_q3pksqkf_2_1
-rw-r----- 1 oracle oinstall 21472870400 Oct 12 20:30 sh_db_full_q2pksqke_2_1
-rw-r----- 1 oracle oinstall 21472862208 Oct 12 20:34 sh_db_full_q4pksqkg_2_1
-rw-r----- 1 oracle oinstall 21472878592 Oct 12 21:54 sh_db_full_q5pksqkh_3_1
-rw-r----- 1 oracle oinstall 21472796672 Oct 12 22:06 sh_db_full_q3pksqkf_3_1
-rw-r----- 1 oracle oinstall 21472968704 Oct 12 22:21 sh_db_full_q2pksqke_3_1
-rw-r----- 1 oracle oinstall 21472919552 Oct 12 22:24 sh_db_full_q4pksqkg_3_1
-rw-r----- 1 oracle oinstall 21472804864 Oct 12 23:35 sh_db_full_q5pksqkh_4_1
-rw-r----- 1 oracle oinstall 21472894976 Oct 12 23:58 sh_db_full_q3pksqkf_4_1
-rw-r----- 1 oracle oinstall 21472813056 Oct 13 00:06 sh_db_full_q4pksqkg_4_1
-rw-r----- 1 oracle oinstall 21472903168 Oct 13 00:11 sh_db_full_q2pksqke_4_1
-rw-r----- 1 oracle oinstall 21472993280 Oct 13 01:20 sh_db_full_q5pksqkh_5_1
-rw-r----- 1 oracle oinstall 21472927744 Oct 13 01:48 sh_db_full_q3pksqkf_5_1
-rw-r----- 1 oracle oinstall 21472763904 Oct 13 01:50 sh_db_full_q4pksqkg_5_1
-rw-r----- 1 oracle oinstall 21472878592 Oct 13 02:00 sh_db_full_q2pksqke_5_1
-rw-r----- 1 oracle oinstall 21472788480 Oct 13 03:09 sh_db_full_q5pksqkh_6_1
-rw-r----- 1 oracle oinstall 21473034240 Oct 13 03:39 sh_db_full_q4pksqkg_6_1
-rw-r----- 1 oracle oinstall 21472894976 Oct 13 03:41 sh_db_full_q3pksqkf_6_1
-rw-r----- 1 oracle oinstall 1160511488 Oct 13 03:47 sh_db_full_q3pksqkf_7_1
-rw-r----- 1 oracle oinstall 21472829440 Oct 13 03:57 sh_db_full_q2pksqke_6_1
-rw-r----- 1 oracle oinstall 10962452480 Oct 13 04:06 sh_db_full_q5pksqkh_7_1
-rw-r----- 1 oracle oinstall 5458075648 Oct 13 04:07 sh_db_full_q4pksqkg_7_1
-rw-r----- 1 oracle oinstall 3678208000 Oct 13 04:17 sh_db_full_q2pksqke_7_1
-rw-r----- 1 oracle oinstall 21472804864 Oct 13 05:41 sh_db_full_q6pku1ep_1_1
-rw-r----- 1 oracle oinstall 21472788480 Oct 13 05:55 sh_db_full_q8pku2je_1_1
-rw-r----- 1 oracle oinstall 21472772096 Oct 13 05:57 sh_db_full_q7pku2hk_1_1
-rw-r----- 1 oracle oinstall 21472878592 Oct 13 06:04 sh_db_full_q9pku37d_1_1
-rw-r----- 1 oracle oinstall 21472780288 Oct 13 07:30 sh_db_full_q6pku1ep_2_1
-rw-r----- 1 oracle oinstall 21472911360 Oct 13 07:42 sh_db_full_q8pku2je_2_1
-rw-r----- 1 oracle oinstall 21472944128 Oct 13 07:44 sh_db_full_q7pku2hk_2_1
-rw-r----- 1 oracle oinstall 21472788480 Oct 13 07:53 sh_db_full_q9pku37d_2_1
-rw-r----- 1 oracle oinstall 21472903168 Oct 13 09:18 sh_db_full_q6pku1ep_3_1
-rw-r----- 1 oracle oinstall 21472788480 Oct 13 09:32 sh_db_full_q8pku2je_3_1
-rw-r----- 1 oracle oinstall 21472780288 Oct 13 09:33 sh_db_full_q7pku2hk_3_1
-rw-r----- 1 oracle oinstall 21472878592 Oct 13 09:42 sh_db_full_q9pku37d_3_1
-rw-r----- 1 oracle oinstall 21472985088 Oct 13 11:01 sh_db_full_q6pku1ep_4_1
-rw-r----- 1 oracle oinstall 21472763904 Oct 13 11:21 sh_db_full_q7pku2hk_4_1
-rw-r----- 1 oracle oinstall 21472870400 Oct 13 11:27 sh_db_full_q8pku2je_4_1
-rw-r----- 1 oracle oinstall 21472763904 Oct 13 11:30 sh_db_full_q9pku37d_4_1