Linux主機記憶體溢位導致oracle的SYS使用者無法正常登陸
一般情況下,ORACLE DBA看到如下情況的第一反應是,資料庫例項沒有啟動或者是資料庫環境變數沒有設定正確,今天遇到的情況均不是以上兩種情況,有點特別,且來看看為哪般。
oracle@POC-SV12-I2KDB:~> sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Thu Aug 13 11:31:58 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to an idle instance.
SQL> quit
Disconnected.
檢查資料庫例項是否啟動
oracle@POC-SV12-I2KDB:~> ps -ef|grep ora_
oracle 8799 1 0 2011 ? 02:27:30 ora_pmon_inomc
oracle 8801 1 0 2011 ? 00:00:13 ora_vktm_inomc
oracle 8805 1 0 2011 ? 00:00:26 ora_diag_inomc
oracle 8807 1 0 2011 ? 00:00:53 ora_dbrm_inomc
oracle 8809 1 0 2011 ? 00:07:28 ora_psp0_inomc
oracle 8811 1 0 2011 ? 1-22:14:21 ora_dia0_inomc
oracle 8813 1 0 2011 ? 00:00:22 ora_mman_inomc
oracle 8815 1 0 2011 ? 01:09:25 ora_dbw0_inomc
oracle 8817 1 0 2011 ? 00:39:51 ora_lgwr_inomc
oracle 8819 1 0 2011 ? 04:23:53 ora_ckpt_inomc
oracle 8821 1 0 2011 ? 01:35:38 ora_smon_inomc
oracle 8823 1 0 2011 ? 00:00:05 ora_reco_inomc
oracle 8825 1 0 2011 ? 00:16:42 ora_mmon_inomc
oracle 8827 1 0 2011 ? 02:24:41 ora_mmnl_inomc
oracle 8829 1 0 2011 ? 00:00:07 ora_d000_inomc
oracle 8831 1 0 2011 ? 00:00:07 ora_s000_inomc
oracle 8875 1 0 2011 ? 00:03:26 ora_arc0_inomc
oracle 8877 1 0 2011 ? 00:03:27 ora_arc1_inomc
oracle 8879 1 0 2011 ? 00:03:28 ora_arc2_inomc
oracle 8881 1 0 2011 ? 00:00:16 ora_arc3_inomc
oracle 8883 1 0 2011 ? 00:00:16 ora_fbda_inomc
oracle 8885 1 0 2011 ? 00:00:10 ora_qmnc_inomc
oracle 8901 1 0 2011 ? 00:00:05 ora_q000_inomc
oracle 8903 1 0 2011 ? 00:08:33 ora_q001_inomc
oracle 10895 1 0 2011 ? 01:02:28 ora_cjq0_inomc
oracle 10965 1 0 2011 ? 00:00:26 ora_smco_inomc
oracle 23221 22576 0 11:31 pts/2 00:00:00 grep ora_
檢查資料庫監聽狀態是否正常
oracle@POC-SV12-I2KDB:~> lsnrctl status
LSNRCTL for Linux: Version 11.1.0.7.0 - Production on 13-AUG-2015 11:31:34
Copyright (c) 1991, 2008, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.1.0.7.0 - Production
Start Date 17-SEP-2011 14:59:03
Uptime 431 days 15 hr. 36 min. 44 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/oracle/app/product/11g/db/network/admin/listener.ora
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=POC-SV12-I2KDB)(PORT=1521)))
Services Summary...
Service "inomc" has 1 instance(s).
Instance "inomc", status READY, has 1 handler(s) for this service...
Service "inomcXDB" has 1 instance(s).
Instance "inomc", status READY, has 1 handler(s) for this service...
Service "inomc_XPT" has 1 instance(s).
Instance "inomc", status READY, has 1 handler(s) for this service...
The command completed successfully
看吧,資料庫例項狀態、監聽狀態都是正常的,但是ORACLE資料庫使用者SYS登入就是不能一如往常登入進去。
再排除一下環境變數設定不當(如果同一資料庫安裝多個例項,ORACLE環境變數又ORACLE_SID配置不當是有可能出現SYS登入空閒例項的)的問題
oracle@POC-SV12-I2KDB:/opt/oracle/app/product/11g/db> pwd
/opt/oracle/app/product/11g/db
oracle@POC-SV12-I2KDB:/opt/oracle/app/product/11g/db> ps -ef|grep smon
oracle 8821 1 0 2011 ? 01:35:38 ora_smon_inomc
oracle 32267 22576 0 11:36 pts/2 00:00:00 grep smon
oracle@POC-SV12-I2KDB:~> echo $ORACLE_HOME
/opt/oracle/app/product/11g/db
oracle@POC-SV12-I2KDB:~> echo $ORACLE_SID
inomc
資料庫環境變數也都是正常配置了的,那我接下來嘗試使用業務使用者在本地登入看資料庫報什麼錯誤:
oracle@POC-SV12-I2KDB:/opt/oracle/app/product/11g/db/network/admin> sqlplus imap/imap
SQL*Plus: Release 11.1.0.7.0 - Production on Thu Aug 13 11:42:21 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
ERROR:
ORA-01034: ORACLE not available
ORA-27102: out of memory
Linux-x86_64 Error: 12: Cannot allocate memory
Additional information: 1
Additional information: 819200
Additional information: 8
Process ID: 0
Session ID: 0 Serial number: 0
這回很明顯了,資料庫報記憶體溢位了,接下來再看下當前資料庫連線到資料庫例項的程式,由於當前資料庫SYS無法登入,只能ps -ef|grep LOCAL了,結果發現有300個之多。
oracle@POC-SV12-I2KDB:~> ps -ef|grep LOCAL
oracle 28688 1 0 2011 ? 00:03:05 oracleinomc (LOCAL=NO)
oracle 28690 1 0 2011 ? 00:00:00 oracleinomc (LOCAL=NO)
oracle 28737 1 0 2011 ? 00:00:00 oracleinomc (LOCAL=NO)
oracle 28762 1 0 2011 ? 00:00:00 oracleinomc (LOCAL=NO)
oracle 28782 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28785 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28791 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28795 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28798 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28815 1 0 2011 ? 00:00:00 oracleinomc (LOCAL=NO)
oracle 29217 1 0 2011 ? 00:11:59 oracleinomc (LOCAL=NO)
oracle 29226 1 0 2011 ? 00:09:16 oracleinomc (LOCAL=NO)
.
.
.
再看下資料庫伺服器的記憶體狀態發現,16G的記憶體確實已經用完了,SWAP分割槽也已經使用殆盡了。
oracle@POC-SV12-I2KDB:~> free -t
total used free shared buffers cached
Mem: 8096276 8039268 57008 0 195744 1732592
-/+ buffers/cache: 6110932 1985344
Swap: 16779852 16779844 8
Total: 24876128 24819112 57016
與現場業務、系統管理員方溝通後決定殺掉LOCAL=NO的程式釋放記憶體。
oracle@POC-SV12-I2KDB:~> kill -9 28688
oracle@POC-SV12-I2KDB:~> kill -9 28690
oracle@POC-SV12-I2KDB:~> kill -9 28737
oracle@POC-SV12-I2KDB:~> kill -9 28762
oracle@POC-SV12-I2KDB:~> kill -9 28782
oracle@POC-SV12-I2KDB:~> kill -9 28785
oracle@POC-SV12-I2KDB:~> kill -9 28791
oracle@POC-SV12-I2KDB:~> kill -9 28795
oracle@POC-SV12-I2KDB:~> kill -9 28798
oracle@POC-SV12-I2KDB:~> kill -9 28815
oracle@POC-SV12-I2KDB:~> free
total used free shared buffers cached
Mem: 8096276 8044760 51516 0 195652 1730480
-/+ buffers/cache: 6118628 1977648
Swap: 16779852 16754328 25524
oracle@POC-SV12-I2KDB:~> free
total used free shared buffers cached
Mem: 8096276 8033788 62488 0 194856 1686568
-/+ buffers/cache: 6152364 1943912
Swap: 16779852 16753524 26328
oracle@POC-SV12-I2KDB:~> free
total used free shared buffers cached
Mem: 8096276 8028440 67836 0 194856 1686568
-/+ buffers/cache: 6147016 1949260
Swap: 16779852 16753524 26328
oracle@POC-SV12-I2KDB:~> free
total used free shared buffers cached
Mem: 8096276 8006900 89376 0 194856 1686568
-/+ buffers/cache: 6125476 1970800
Swap: 16779852 16753524 26328
釋放完部分記憶體,再嘗試oracle管理賬戶SYS本地登入,發現SYS使用者能夠正常登入了:
oracle@POC-SV12-I2KDB:~> sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Thu Aug 13 11:48:29 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options
SQL>
後續分析,真的很奇怪,以前遇見過會話數超、程式數超、記憶體溢位SYS無法登入的,但是現狀也只是到如下就卡主(這是比較明顯的,要麼是像業務使用者本地登入一樣直接報記憶體溢位)
oracle@POC-SV12-I2KDB:~> sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Thu Aug 13 11:48:29 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
由於查殺程式前無法登入資料庫,無法獲知告警日誌的確切位置,殺過程式後,檢視告警日誌,有大量如下報錯:
Process J000 died, see its trace file
kkjcre1p: unable to spawn jobq slave process
Errors in file /opt/oracle/app/diag/rdbms/inomc/inomc/trace/inomc_cjq0_10895.trc:
.
.
.
Thu Aug 13 11:45:52 2015
Process W000 died, see its trace file
Process W000 died, see its trace file
Process W000 died, see its trace file
檢視kkjcre1p: unable to spawn jobq slave process 的官方解釋,說可能是資料庫程式數超了,但是資料庫告警日誌沒有報,並且檢視資料庫程式數設定有1000個之多,會話數設定有1101個之多,根據現有資訊分析,不是資料庫程式數超或會話數超引起的。
總結:由於資料庫伺服器記憶體小,而資料庫會話數、程式數設定過大,當資料庫程式數急劇增多時,資料庫伺服器記憶體耗盡,導致資料庫管理賬戶SYS無法登陸;比較奇怪的是11G的SYS無法登陸不報伺服器記憶體溢位卻連線空閒例項,而使用業務使用者登入時卻報了明顯的記憶體溢位。
oracle@POC-SV12-I2KDB:~> sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Thu Aug 13 11:31:58 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to an idle instance.
SQL> quit
Disconnected.
檢查資料庫例項是否啟動
oracle@POC-SV12-I2KDB:~> ps -ef|grep ora_
oracle 8799 1 0 2011 ? 02:27:30 ora_pmon_inomc
oracle 8801 1 0 2011 ? 00:00:13 ora_vktm_inomc
oracle 8805 1 0 2011 ? 00:00:26 ora_diag_inomc
oracle 8807 1 0 2011 ? 00:00:53 ora_dbrm_inomc
oracle 8809 1 0 2011 ? 00:07:28 ora_psp0_inomc
oracle 8811 1 0 2011 ? 1-22:14:21 ora_dia0_inomc
oracle 8813 1 0 2011 ? 00:00:22 ora_mman_inomc
oracle 8815 1 0 2011 ? 01:09:25 ora_dbw0_inomc
oracle 8817 1 0 2011 ? 00:39:51 ora_lgwr_inomc
oracle 8819 1 0 2011 ? 04:23:53 ora_ckpt_inomc
oracle 8821 1 0 2011 ? 01:35:38 ora_smon_inomc
oracle 8823 1 0 2011 ? 00:00:05 ora_reco_inomc
oracle 8825 1 0 2011 ? 00:16:42 ora_mmon_inomc
oracle 8827 1 0 2011 ? 02:24:41 ora_mmnl_inomc
oracle 8829 1 0 2011 ? 00:00:07 ora_d000_inomc
oracle 8831 1 0 2011 ? 00:00:07 ora_s000_inomc
oracle 8875 1 0 2011 ? 00:03:26 ora_arc0_inomc
oracle 8877 1 0 2011 ? 00:03:27 ora_arc1_inomc
oracle 8879 1 0 2011 ? 00:03:28 ora_arc2_inomc
oracle 8881 1 0 2011 ? 00:00:16 ora_arc3_inomc
oracle 8883 1 0 2011 ? 00:00:16 ora_fbda_inomc
oracle 8885 1 0 2011 ? 00:00:10 ora_qmnc_inomc
oracle 8901 1 0 2011 ? 00:00:05 ora_q000_inomc
oracle 8903 1 0 2011 ? 00:08:33 ora_q001_inomc
oracle 10895 1 0 2011 ? 01:02:28 ora_cjq0_inomc
oracle 10965 1 0 2011 ? 00:00:26 ora_smco_inomc
oracle 23221 22576 0 11:31 pts/2 00:00:00 grep ora_
檢查資料庫監聽狀態是否正常
oracle@POC-SV12-I2KDB:~> lsnrctl status
LSNRCTL for Linux: Version 11.1.0.7.0 - Production on 13-AUG-2015 11:31:34
Copyright (c) 1991, 2008, Oracle. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.1.0.7.0 - Production
Start Date 17-SEP-2011 14:59:03
Uptime 431 days 15 hr. 36 min. 44 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/oracle/app/product/11g/db/network/admin/listener.ora
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=POC-SV12-I2KDB)(PORT=1521)))
Services Summary...
Service "inomc" has 1 instance(s).
Instance "inomc", status READY, has 1 handler(s) for this service...
Service "inomcXDB" has 1 instance(s).
Instance "inomc", status READY, has 1 handler(s) for this service...
Service "inomc_XPT" has 1 instance(s).
Instance "inomc", status READY, has 1 handler(s) for this service...
The command completed successfully
看吧,資料庫例項狀態、監聽狀態都是正常的,但是ORACLE資料庫使用者SYS登入就是不能一如往常登入進去。
再排除一下環境變數設定不當(如果同一資料庫安裝多個例項,ORACLE環境變數又ORACLE_SID配置不當是有可能出現SYS登入空閒例項的)的問題
oracle@POC-SV12-I2KDB:/opt/oracle/app/product/11g/db> pwd
/opt/oracle/app/product/11g/db
oracle@POC-SV12-I2KDB:/opt/oracle/app/product/11g/db> ps -ef|grep smon
oracle 8821 1 0 2011 ? 01:35:38 ora_smon_inomc
oracle 32267 22576 0 11:36 pts/2 00:00:00 grep smon
oracle@POC-SV12-I2KDB:~> echo $ORACLE_HOME
/opt/oracle/app/product/11g/db
oracle@POC-SV12-I2KDB:~> echo $ORACLE_SID
inomc
資料庫環境變數也都是正常配置了的,那我接下來嘗試使用業務使用者在本地登入看資料庫報什麼錯誤:
oracle@POC-SV12-I2KDB:/opt/oracle/app/product/11g/db/network/admin> sqlplus imap/imap
SQL*Plus: Release 11.1.0.7.0 - Production on Thu Aug 13 11:42:21 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
ERROR:
ORA-01034: ORACLE not available
ORA-27102: out of memory
Linux-x86_64 Error: 12: Cannot allocate memory
Additional information: 1
Additional information: 819200
Additional information: 8
Process ID: 0
Session ID: 0 Serial number: 0
這回很明顯了,資料庫報記憶體溢位了,接下來再看下當前資料庫連線到資料庫例項的程式,由於當前資料庫SYS無法登入,只能ps -ef|grep LOCAL了,結果發現有300個之多。
oracle@POC-SV12-I2KDB:~> ps -ef|grep LOCAL
oracle 28688 1 0 2011 ? 00:03:05 oracleinomc (LOCAL=NO)
oracle 28690 1 0 2011 ? 00:00:00 oracleinomc (LOCAL=NO)
oracle 28737 1 0 2011 ? 00:00:00 oracleinomc (LOCAL=NO)
oracle 28762 1 0 2011 ? 00:00:00 oracleinomc (LOCAL=NO)
oracle 28782 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28785 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28791 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28795 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28798 1 0 2011 ? 00:00:16 oracleinomc (LOCAL=NO)
oracle 28815 1 0 2011 ? 00:00:00 oracleinomc (LOCAL=NO)
oracle 29217 1 0 2011 ? 00:11:59 oracleinomc (LOCAL=NO)
oracle 29226 1 0 2011 ? 00:09:16 oracleinomc (LOCAL=NO)
.
.
.
再看下資料庫伺服器的記憶體狀態發現,16G的記憶體確實已經用完了,SWAP分割槽也已經使用殆盡了。
oracle@POC-SV12-I2KDB:~> free -t
total used free shared buffers cached
Mem: 8096276 8039268 57008 0 195744 1732592
-/+ buffers/cache: 6110932 1985344
Swap: 16779852 16779844 8
Total: 24876128 24819112 57016
與現場業務、系統管理員方溝通後決定殺掉LOCAL=NO的程式釋放記憶體。
oracle@POC-SV12-I2KDB:~> kill -9 28688
oracle@POC-SV12-I2KDB:~> kill -9 28690
oracle@POC-SV12-I2KDB:~> kill -9 28737
oracle@POC-SV12-I2KDB:~> kill -9 28762
oracle@POC-SV12-I2KDB:~> kill -9 28782
oracle@POC-SV12-I2KDB:~> kill -9 28785
oracle@POC-SV12-I2KDB:~> kill -9 28791
oracle@POC-SV12-I2KDB:~> kill -9 28795
oracle@POC-SV12-I2KDB:~> kill -9 28798
oracle@POC-SV12-I2KDB:~> kill -9 28815
oracle@POC-SV12-I2KDB:~> free
total used free shared buffers cached
Mem: 8096276 8044760 51516 0 195652 1730480
-/+ buffers/cache: 6118628 1977648
Swap: 16779852 16754328 25524
oracle@POC-SV12-I2KDB:~> free
total used free shared buffers cached
Mem: 8096276 8033788 62488 0 194856 1686568
-/+ buffers/cache: 6152364 1943912
Swap: 16779852 16753524 26328
oracle@POC-SV12-I2KDB:~> free
total used free shared buffers cached
Mem: 8096276 8028440 67836 0 194856 1686568
-/+ buffers/cache: 6147016 1949260
Swap: 16779852 16753524 26328
oracle@POC-SV12-I2KDB:~> free
total used free shared buffers cached
Mem: 8096276 8006900 89376 0 194856 1686568
-/+ buffers/cache: 6125476 1970800
Swap: 16779852 16753524 26328
釋放完部分記憶體,再嘗試oracle管理賬戶SYS本地登入,發現SYS使用者能夠正常登入了:
oracle@POC-SV12-I2KDB:~> sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Thu Aug 13 11:48:29 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options
SQL>
後續分析,真的很奇怪,以前遇見過會話數超、程式數超、記憶體溢位SYS無法登入的,但是現狀也只是到如下就卡主(這是比較明顯的,要麼是像業務使用者本地登入一樣直接報記憶體溢位)
oracle@POC-SV12-I2KDB:~> sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Thu Aug 13 11:48:29 2015
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
由於查殺程式前無法登入資料庫,無法獲知告警日誌的確切位置,殺過程式後,檢視告警日誌,有大量如下報錯:
Process J000 died, see its trace file
kkjcre1p: unable to spawn jobq slave process
Errors in file /opt/oracle/app/diag/rdbms/inomc/inomc/trace/inomc_cjq0_10895.trc:
.
.
.
Thu Aug 13 11:45:52 2015
Process W000 died, see its trace file
Process W000 died, see its trace file
Process W000 died, see its trace file
檢視kkjcre1p: unable to spawn jobq slave process 的官方解釋,說可能是資料庫程式數超了,但是資料庫告警日誌沒有報,並且檢視資料庫程式數設定有1000個之多,會話數設定有1101個之多,根據現有資訊分析,不是資料庫程式數超或會話數超引起的。
總結:由於資料庫伺服器記憶體小,而資料庫會話數、程式數設定過大,當資料庫程式數急劇增多時,資料庫伺服器記憶體耗盡,導致資料庫管理賬戶SYS無法登陸;比較奇怪的是11G的SYS無法登陸不報伺服器記憶體溢位卻連線空閒例項,而使用業務使用者登入時卻報了明顯的記憶體溢位。
來自 “ ITPUB部落格 ” ,連結:http://blog.itpub.net/29357786/viewspace-1770478/,如需轉載,請註明出處,否則將追究法律責任。
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