玉面飞龙的BLOG

说EXPDP无语，那是因为它完全不customer focus，特别是导出数据量很大表很多的schema的时候，经常”假寐”。
“假寐”就是假死,hang.

今天用expdp作用户级别的逻辑备份，该用户有2200多个表，导出文件共85G，没有使用并行大概花费了3个小时不到。

运行命令后的半个小时内，导出文件大小没有任何变化，察看active session，有个在长时间等待”wait for unread message on broadcast channel”，给人的感觉是hang住，不靠普。

后来准备开窗口使用传统的exp,继续观察expdp。”假寐”后,EXPDP先把最大的一个表给导出来了，后来又导出了几个10g的表。原来我没有碰见真死的bug。观察日志文件，expdp基本按照表从大到小进行数据导出。倒是比exp快，可惜用户体验不行。

详细命令和日志如下

yumianfeilong$> more backup_expdp.log
Export: Release 10.2.0.4.0 - 64bit Production on Wednesday, 03 February, 2010 19:54:02
Copyright (c) 2003, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
FLASHBACK automatically enabled to preserve database integrity.
Starting “SCOTT”.”SYS_EXPORT_SCHEMA_01″: SCOTT/******** schemas=SCOTT directory=EXPDP dumpfile=backup_expdp.dmp logfile=backup_expdp.log
Estimate in progress using BLOCKS method…
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 122.4 GB
Processing object type SCHEMA_EXPORT/PRE_SCHEMA/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/SEQUENCE/SEQUENCE
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/GRANT/OWNER_GRANT/OBJECT_GRANT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/COMMENT
Processing object type SCHEMA_EXPORT/VIEW/VIEW
Processing object type SCHEMA_EXPORT/VIEW/GRANT/OWNER_GRANT/OBJECT_GRANT
Processing object type SCHEMA_EXPORT/TABLE/TRIGGER
Processing object type SCHEMA_EXPORT/TABLE/INDEX/FUNCTIONAL_AND_BITMAP/INDEX
Processing object type SCHEMA_EXPORT/TABLE/STATISTICS/TABLE_STATISTICS
. . exported “SCOTT”.”TABLE725″ 11.39 GB 39455120 rows
. . exported “SCOTT”.”TABLE1085″ 10.87 GB 225445 rows
. . exported “SCOTT”.”adfadsfdsf” 11.07 GB 43002 rows
. . exported “SCOTT”.”adfasdf” 163.2 MB 640381 rows
. . exported “SCOTT”.”adfasdf” 6.170 GB 5758755 rows
. . exported “SCOTT”.”adfasdf” 4.362 GB 3667986 rows
. . exported “SCOTT”.”adfsdf” 1.325 GB 39455120 rows
. . exported “SCOTT”.”werwer” 1.303 GB 4759513 rows
. . exported “SCOTT”.”fadf” 102.9 MB 58882 rows
. . exported “SCOTT”.”zzzzzzzzzzzz” 21.27 MB 77610 rows
…………………………
. . exported “SCOTT”.”xxxxxxxxxxx” 381.5 MB 4443678 rows
. . exported “SCOTT”.”cccccccccc” 314.1 MB 50703 rows
. . exported “SCOTT”.”vvvvvvvv” 360.8 MB 19679 rows
. . exported “SCOTT”.”nnnnnnnnnn” 199.3 MB 79876 rows
…………………………
. . exported “SCOTT”.”mmmmmmmmmmmmm” 55.57 MB 4719 rows
. . exported “SCOTT”.”jjjjjjjjjjjjjj” 50.01 MB 27200 rows
. . exported “SCOTT”.”kkkkkkkkkkkkk” 36.18 MB 14629 rows
. . exported “SCOTT”.”llllllll” 49.89 MB 173582 rows
……………………
. . exported “SCOTT”.”ttttttttttttt” 3.667 MB 5810 rows
. . exported “SCOTT”.”tttttttttttttt” 3.843 MB 20287 rows
. . exported “SCOTT”.”ttttttttttttttt” 2.710 MB 79876 rows
. . exported “SCOTT”.”tttttttttttttttttt” 565.6 KB 16233 rows

. . exported “SCOTT”.”ahhhhhhhhhhhhhhh” 1.826 MB 38701 rows
. . exported “SCOTT”.”qqqqqqqqqqqqqqqq” 1.122 MB 65065 rows
. . exported “SCOTT”.”beeeeeeeeeee” 1.122 MB 65065 rows

. . exported “SCOTT”.”Tttttttt1119″ 2.600 MB 12544 rows
. . exported “SCOTT”.”T515″ 1.810 MB 15267 rows
. . exported “SCOTT”.”T518″ 2.571 MB 34564 rows
. . exported “SCOTT”.”Tttttttttt668″ 1.937 MB 1339 rows
. . exported “SCOTT”.”Tttttttttttttt994″ 984.5 KB 1502 rows
. . exported “SCOTT”.”Taaaaaaa541″ 1.455 MB 1153 rows
. . exported “SCOTT”.”Taaaaaa593″ 1.189 MB 768 rows
. . exported “SCOTT”.”aaaaaaaaaaaaaaa” 1.512 MB 3475 rows
…………………………………………
. . exported “SCOTT”.”ABC” 28.21 KB 177 rows
. . exported “SCOTT”.”jjjjjjjjjjjjj” 761.1 KB 43002 rows
. . exported “SCOTT”.”yyyyyyyyyy” 904.7 KB 3607 rows
. . exported “SCOTT”.”ffffffffffff” 91.74 KB 797 rows
. . exported “SCOTT”.”wwwwwwwww” 259.1 KB 1 rows
. . exported “SCOTT”.”rrrrrrrrrrrrrr” 7.687 KB 140 rows
. . exported “SCOTT”.”ddddddddddddde” 7.687 KB 140 rows
……………………………….
. . exported “SCOTT”.”T991″ 12.60 KB 3 rows
. . exported “SCOTT”.”T993″ 38.60 KB 429 rows
. . exported “SCOTT”.”TTTTTTTT” 0 KB 0 rows
. . exported “SCOTT”.”bbbbbbbbbb” 0 KB 0 rows
………………………………………
Master table “SCOTT”.”SYS_EXPORT_SCHEMA_01″ successfully loaded/unloaded
******************************************************************************
Dump file set for SCOTT.SYS_EXPORT_SCHEMA_01 is:
/oracle/TRACE/archive/EXPDP/backup_expdp.dmp
Job “SCOTT”.”SYS_EXPORT_SCHEMA_01″ completed with 0 error(s) at 22:46:43

单表expdp测试没有假死问题。