exp日常操作

1、跟蹤exp導出操作

strace -o sexp.txt exp user/password file=exptable.dmp buffer=4096000

or

ps -ef |grep exp 

strace -c -p exp_pid

eg:

[oracle@orcl ~]$ strace -c -p 3859

Process 3859 attached - interrupt to quit

Process 3859 detached

% time     seconds  usecs/call     calls    errors syscall

------ ----------- ----------- --------- --------- ----------------

 87.38    0.004672        2336         2           brk

  6.62    0.000354           0      2045           write

  6.00    0.000321           0      1882           read

  0.00    0.000000           0         5           close

  0.00    0.000000           0        18           lseek

  0.00    0.000000           0         4           munmap

  0.00    0.000000           0         1           rt_sigaction

  0.00    0.000000           0         2           rt_sigprocmask

------ ----------- ----------- --------- --------- ----------------

100.00    0.005347                  3959           total

2、EXP-00091: Exporting questionable statistics

[oracle@orcl ~]$ exp lineqi/lineqi file=/home/oracle/aaa.dmp tables=aaa  query=\" where id=2 \"

Export: Release 11.2.0.4.0 - Production on Sat Oct 21 13:22:12 2017

……………………

About to export specified tables via Conventional Path ...

. . exporting table                            AAA          1 rows exported

EXP-00091: Exporting questionable statistics

導出部分表中數據，提示統計信息有問題，這裏可以加上statistics=none參數

exp lineqi/lineqi file=/home/oracle/aaa.dmp tables=aaa  query=\" where id=2 \" statistics=none

About to export specified tables via Conventional Path ...

. . exporting table                            AAA          1 rows exported

Export terminated successfully without warnings.

出現EXP-00091還有可能是數據庫字符集與客戶字符集（NLS_LANG）不一致，

select * from v$nls_parameters where parameter like 'NLS_CHARACTERSET%';

NLS_CHARACTERSET                AL32UTF8

[oracle@orcl ~]$ echo $NLS_LANG

AMERICAN_AMERICA.ZHS16GBK

[oracle@orcl ~]$ exp lineqi/lineqi@satdb file=/home/oracle/aaa04.dmp tables=aaa  

Export: Release 11.2.0.4.0 - Production on Sat Oct 21 13:36:18 2017

About to export specified tables via Conventional Path ...

. . exporting table                            AAA         14 rows exported

EXP-00091: Exporting questionable statistics.

Export terminated successfully with warnings.

3、獲取exp導出dump文件中表信息

strings test02.dmp |grep "CREATE TABLE"|awk '{print $3}'|sed 's/"//g'

AAA

BFW_TEST

CBC_TEST

EMP1

PAGE

strings test02.dmp |grep "CREATE TABLE"|awk '{print $3}'|sed 's/"//g'|awk '{if(FNR==1) print "table="$1;else print ","$1}'

table=AAA

,BFW_TEST

,CBC_TEST

,EMP1

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