今早巡檢資料庫發現如下報錯：
fri jul 15 06:03:03 2011
ora-1652: unable to extend temp segment by 128 in tablespace temp
…… fri jul 15 08:02:59 2011
ora-1652: unable to extend temp segment by 128 in tablespace temp
通過檢視表空間發現，temp表空間被擴充套件到了32g，而原先設定的只有4g，我們通過如下語句分析temp表空間有什麼東西這麼耗空間：
selectse.username,sid,serial#,sql_address,machine, program,tablespace,segtype,contents
fromv$session se,v$sort_usage su
wherese.saddr=su.session_addr
orderbymachine
查詢結果如下：
查詢結果如下：
username
sidserial#
sql_address
machine
program
tablespace
segtype
contents
phc831
30700
port-web
temp
lob_data
temporary
phc897
10837
00port-web
temp
lob_data
temporary
phc928
62946
00port-web
temp
lob_data
temporary
phc893
59116
00port-web
temp
lob_data
temporary
phc1081
30775
00port-web
temp
lob_data
temporary
phc1025
24989
00port-web
temp
lob_data
temporary
phc907
10378
00workgroup\port-sjjh2
plsqldev.exe
temp
lob_data
temporary
eport_admin
1080
63733
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
92343188
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
1047
23000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
92929713
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
81644578
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
91020498
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
96950313
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
91557
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
8767930
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
90640178
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
83626868
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
eport_admin
91250385
000000025b61af28
workgroup\test-wztjfz
logread.exe
temp
sort
temporary
仔細看如下查詢結果，eport_admin是以前很少見到的，懷疑logread.exe存在嫌疑，考慮到這只是個資料同步程序，考慮如下命令kill掉：
alter system kill session '1080,63733';
alter system kill session '923,43188';
alter system kill session '1047,23';
alter system kill session '929,29713';
alter system kill session '816,44578';
alter system kill session '910,20498';
alter system kill session '969,50313';
alter system kill session '915,57';
alter system kill session '876,7930';
alter system kill session '906,40178';
alter system kill session '836,26868';
alter system kill session '912,50385';
語句執行後eport_admin的程序在temp表空間消失，再來看temp表空間，已經基本清空：
name
size (mb)
used (mb)
used (%)
free (mb)
status
datafiles
type
temp
32,767.00
470.1
32,720.00
1temporary
結論：顯然eport_admin下的logread.exe存在大量表空間的開銷，這在業務高峰期是非常危險的現象。
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