通过查询metalink给出了以下解决方案，目前系统交换分区跟内存一样都是8G，就没有扩充；最后通过在不过度影响数据库性能的方式减
有个数据库因为内存耗尽导致重启，，以下为alert日志记录的错误信息：
Mon Jun 13 15:27:47 EAT 2011
ERROR: Failed to connect with connect string:(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/Oracle/product/10.2.0/db_tmp/bin/oracle)(ARGV0=orac
le+ASM1)(ENVS='ORACLE_HOME=/oracle/product/10.2.0/db_tmp,ORACLE_SID=+ASM1')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=
setuser))
ERROR: Failed to connect with connect string:(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/oracle/product/10.2.0/db_tmp/bin/oracle)(ARGV0=orac
le+ASM1)(ENVS='ORACLE_HOME=/oracle/product/10.2.0/db_tmp,ORACLE_SID=+ASM1')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=
setuser))
ERROR: Failed to connect with connect string:(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/oracle/product/10.2.0/db_tmp/bin/oracle)(ARGV0=orac
le+ASM1)(ENVS='ORACLE_HOME=/oracle/product/10.2.0/db_tmp,ORACLE_SID=+ASM1')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=
setuser))
ERROR: Failed to connect with connect string:(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/oracle/product/10.2.0/db_tmp/bin/oracle)(ARGV0=orac
le+ASM1)(ENVS='ORACLE_HOME=/oracle/product/10.2.0/db_tmp,ORACLE_SID=+ASM1')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=
setuser))
Mon Jun 13 15:27:47 EAT 2011
Unexpected communication failure with ASM instance:
error 12549 (ORA-12549: TNS:operating system resource quota exceeded
)
NOTE: ASMB process state dumped to trace file /oracle/admin/scrk/bdump/scrk1_arc1_4251.trc
Mon Jun 13 15:27:48 EAT 2011
ERROR: Failed to connect with connect string:(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/oracle/product/10.2.0/db_tmp/bin/oracle)(ARGV0=orac
le+ASM1)(ENVS='ORACLE_HOME=/oracle/product/10.2.0/db_tmp,ORACLE_SID=+ASM1')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=
setuser))
ERROR: Failed to connect with connect string:(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/oracle/product/10.2.0/db_tmp/bin/oracle)(ARGV0=orac
le+ASM1)(ENVS='ORACLE_HOME=/oracle/product/10.2.0/db_tmp,ORACLE_SID=+ASM1')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=
setuser))
ERROR: Failed to connect with connect string:(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/oracle/product/10.2.0/db_tmp/bin/oracle)(ARGV0=orac
le+ASM1)(ENVS='ORACLE_HOME=/oracle/product/10.2.0/db_tmp,ORACLE_SID=+ASM1')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=
setuser))
ERROR: Failed to connect with connect string:(DESCRIPTION=(ADDRESS=(PROTOCOL=beq)(PROGRAM=/oracle/product/10.2.0/db_tmp/bin/oracle)(ARGV0=orac
le+ASM1)(ENVS='ORACLE_HOME=/oracle/product/10.2.0/db_tmp,ORACLE_SID=+ASM1')(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(enable=
setuser))
Mon Jun 13 15:27:49 EAT 2011
Unexpected communication failure with ASM instance:
error 12549 (ORA-12549: TNS:operating system resource quota exceeded
)
NOTE: ASMB process state dumped to trace file /oracle/admin/scrk/bdump/scrk1_arc1_4251.trc
Mon Jun 13 15:27:50 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_arc1_4251.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '+SCRKDATA01/scrk/onlinelog/group_3.980.728931221'
ORA-17503: ksfdopn:2 Failed to open file +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
ORA-12549: TNS:operating system resource quota exceeded
ORA-00312: online log 3 thread 1: '+SCRKDATA01/scrk/onlinelog/group_3.971.728928961'
ORA-17503: ksfdopn:2 Failed to open file +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
ORA-12549: TNS:operating system resource quota exceeded
Mon Jun 13 15:27:50 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_arc1_4251.trc:
ORA-00313: open failed for members of log group 3 of thread 1
ORA-00312: online log 3 thread 1: '+SCRKDATA01/scrk/onlinelog/group_3.980.728931221'
ORA-17503: ksfdopn:2 Failed to open file +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
ORA-12549: TNS:operating system resource quota exceeded
ORA-00312: online log 3 thread 1: '+SCRKDATA01/scrk/onlinelog/group_3.971.728928961'
ORA-17503: ksfdopn:2 Failed to open file +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
ORA-12549: TNS:operating system resource quota exceeded
Mon Jun 13 15:28:55 EAT 2011
Archiver process freed from errors. No longer stopped
Mon Jun 13 15:28:55 EAT 2011
Thread 1 advanced to log sequence 457996 (LGWR switch)
Current log# 3 seq# 457996 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 457996 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:28:55 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:28:55 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn5
ORA-27303: additional information: skgpspawn5
Mon Jun 13 15:28:56 EAT 2011
Process O001 died, see its trace file
Mon Jun 13 15:28:56 EAT 2011
ksvsubmit: Process(O001) creation failed
Mon Jun 13 15:29:06 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:29:06 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn5
ORA-27303: additional information: skgpspawn5
Mon Jun 13 15:29:06 EAT 2011
Thread 1 cannot allocate new log, sequence 457997
Checkpoint not complete
Current log# 3 seq# 457996 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 457996 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:29:07 EAT 2011
Process PZ97 died, see its trace file
Mon Jun 13 15:29:08 EAT 2011
Thread 1 advanced to log sequence 457997 (LGWR switch)
Current log# 2 seq# 457997 mem# 0: +SCRKDATA01/scrk/onlinelog/group_2.972.728929483
Current log# 2 seq# 457997 mem# 1: +SCRKDATA01/scrk/onlinelog/group_2.979.728931207
Mon Jun 13 15:29:18 EAT 2011
Thread 1 cannot allocate new log, sequence 457998
Checkpoint not complete
Current log# 2 seq# 457997 mem# 0: +SCRKDATA01/scrk/onlinelog/group_2.972.728929483
Current log# 2 seq# 457997 mem# 1: +SCRKDATA01/scrk/onlinelog/group_2.979.728931207
Mon Jun 13 15:29:20 EAT 2011
Thread 1 advanced to log sequence 457998 (LGWR switch)
Current log# 1 seq# 457998 mem# 0: +SCRKDATA01/scrk/onlinelog/group_1.976.728930203
Current log# 1 seq# 457998 mem# 1: +SCRKDATA01/scrk/onlinelog/group_1.978.728931175
Mon Jun 13 15:29:23 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:29:23 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn5
ORA-27303: additional information: skgpspawn5
Mon Jun 13 15:29:24 EAT 2011
Process P000 died, see its trace file
Mon Jun 13 15:29:24 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:29:24 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn5
ORA-27303: additional information: skgpspawn5
Mon Jun 13 15:29:25 EAT 2011
Process P001 died, see its trace file
Mon Jun 13 15:29:30 EAT 2011
Thread 1 cannot allocate new log, sequence 457999
Checkpoint not complete
Current log# 1 seq# 457998 mem# 0: +SCRKDATA01/scrk/onlinelog/group_1.976.728930203
Current log# 1 seq# 457998 mem# 1: +SCRKDATA01/scrk/onlinelog/group_1.978.728931175
Mon Jun 13 15:29:32 EAT 2011
Thread 1 advanced to log sequence 457999 (LGWR switch)
Current log# 3 seq# 457999 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 457999 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:29:42 EAT 2011
Thread 1 cannot allocate new log, sequence 458000
Checkpoint not complete
Current log# 3 seq# 457999 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 457999 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:29:44 EAT 2011
Thread 1 advanced to log sequence 458000 (LGWR switch)
Current log# 2 seq# 458000 mem# 0: +SCRKDATA01/scrk/onlinelog/group_2.972.728929483
Current log# 2 seq# 458000 mem# 1: +SCRKDATA01/scrk/onlinelog/group_2.979.728931207
Mon Jun 13 15:29:54 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:29:54 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn5
ORA-27303: additional information: skgpspawn5
Mon Jun 13 15:29:54 EAT 2011
Thread 1 cannot allocate new log, sequence 458001
Checkpoint not complete
Current log# 2 seq# 458000 mem# 0: +SCRKDATA01/scrk/onlinelog/group_2.972.728929483
Current log# 2 seq# 458000 mem# 1: +SCRKDATA01/scrk/onlinelog/group_2.979.728931207
Mon Jun 13 15:29:55 EAT 2011
Process J001 died, see its trace file
Mon Jun 13 15:29:55 EAT 2011
kkjcre1p: unable to spawn jobq slave process
Mon Jun 13 15:29:55 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_cjq0_3796.trc:
Mon Jun 13 15:29:56 EAT 2011
Thread 1 advanced to log sequence 458001 (LGWR switch)
Current log# 1 seq# 458001 mem# 0: +SCRKDATA01/scrk/onlinelog/group_1.976.728930203
Current log# 1 seq# 458001 mem# 1: +SCRKDATA01/scrk/onlinelog/group_1.978.728931175
Mon Jun 13 15:30:06 EAT 2011
Thread 1 advanced to log sequence 458002 (LGWR switch)
Current log# 3 seq# 458002 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 458002 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:30:16 EAT 2011
Thread 1 cannot allocate new log, sequence 458003
Checkpoint not complete
Current log# 3 seq# 458002 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 458002 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:30:17 EAT 2011
Thread 1 advanced to log sequence 458003 (LGWR switch)
Current log# 2 seq# 458003 mem# 0: +SCRKDATA01/scrk/onlinelog/group_2.972.728929483
Current log# 2 seq# 458003 mem# 1: +SCRKDATA01/scrk/onlinelog/group_2.979.728931207
Mon Jun 13 15:30:28 EAT 2011
Thread 1 advanced to log sequence 458004 (LGWR switch)
Current log# 1 seq# 458004 mem# 0: +SCRKDATA01/scrk/onlinelog/group_1.976.728930203
Current log# 1 seq# 458004 mem# 1: +SCRKDATA01/scrk/onlinelog/group_1.978.728931175
Mon Jun 13 15:30:38 EAT 2011
Thread 1 advanced to log sequence 458005 (LGWR switch)
Current log# 3 seq# 458005 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 458005 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:30:40 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:30:40 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 12
ORA-27301: OS failure message: Not enough space
ORA-27302: failure occurred at: skgpspawn3
Mon Jun 13 15:30:41 EAT 2011
Process m001 died, see its trace file
Mon Jun 13 15:30:41 EAT 2011
ksvcreate: Process(m001) creation failed
Mon Jun 13 15:30:46 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:30:46 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 12
ORA-27301: OS failure message: Not enough space
ORA-27302: failure occurred at: skgpspawn3
Mon Jun 13 15:30:47 EAT 2011
Process P000 died, see its trace file
Mon Jun 13 15:30:49 EAT 2011
Thread 1 advanced to log sequence 458006 (LGWR switch)
Current log# 2 seq# 458006 mem# 0: +SCRKDATA01/scrk/onlinelog/group_2.972.728929483
Current log# 2 seq# 458006 mem# 1: +SCRKDATA01/scrk/onlinelog/group_2.979.728931207
Mon Jun 13 15:30:55 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:30:55 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 12
ORA-27301: OS failure message: Not enough space
ORA-27302: failure occurred at: skgpspawn3
Mon Jun 13 15:30:56 EAT 2011
Process J000 died, see its trace file
Mon Jun 13 15:30:56 EAT 2011
kkjcre1p: unable to spawn jobq slave process
Mon Jun 13 15:30:56 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_cjq0_3796.trc:
Mon Jun 13 15:30:59 EAT 2011
Thread 1 advanced to log sequence 458007 (LGWR switch)
Current log# 1 seq# 458007 mem# 0: +SCRKDATA01/scrk/onlinelog/group_1.976.728930203
Current log# 1 seq# 458007 mem# 1: +SCRKDATA01/scrk/onlinelog/group_1.978.728931175
Mon Jun 13 15:31:05 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:31:05 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 12
ORA-27301: OS failure message: Not enough space
ORA-27302: failure occurred at: skgpspawn3
Mon Jun 13 15:31:06 EAT 2011
Process P000 died, see its trace file
Mon Jun 13 15:31:10 EAT 2011
Thread 1 cannot allocate new log, sequence 458008
Checkpoint not complete
Current log# 1 seq# 458007 mem# 0: +SCRKDATA01/scrk/onlinelog/group_1.976.728930203
Current log# 1 seq# 458007 mem# 1: +SCRKDATA01/scrk/onlinelog/group_1.978.728931175
Mon Jun 13 15:31:10 EAT 2011
Thread 1 advanced to log sequence 458008 (LGWR switch)
Current log# 3 seq# 458008 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 458008 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:31:21 EAT 2011
Thread 1 advanced to log sequence 458009 (LGWR switch)
Current log# 2 seq# 458009 mem# 0: +SCRKDATA01/scrk/onlinelog/group_2.972.728929483
Current log# 2 seq# 458009 mem# 1: +SCRKDATA01/scrk/onlinelog/group_2.979.728931207
Mon Jun 13 15:31:26 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:31:26 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 12
ORA-27301: OS failure message: Not enough space
ORA-27302: failure occurred at: skgpspawn3
Mon Jun 13 15:31:27 EAT 2011
Process P000 died, see its trace file
Mon Jun 13 15:31:31 EAT 2011
Thread 1 cannot allocate new log, sequence 458010
Checkpoint not complete
Current log# 2 seq# 458009 mem# 0: +SCRKDATA01/scrk/onlinelog/group_2.972.728929483
Current log# 2 seq# 458009 mem# 1: +SCRKDATA01/scrk/onlinelog/group_2.979.728931207
Mon Jun 13 15:31:33 EAT 2011
Thread 1 advanced to log sequence 458010 (LGWR switch)
Current log# 1 seq# 458010 mem# 0: +SCRKDATA01/scrk/onlinelog/group_1.976.728930203
Current log# 1 seq# 458010 mem# 1: +SCRKDATA01/scrk/onlinelog/group_1.978.728931175
Mon Jun 13 15:31:38 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:31:38 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 12
ORA-27301: OS failure message: Not enough space
ORA-27302: failure occurred at: skgpspawn3
Mon Jun 13 15:31:39 EAT 2011
Process P000 died, see its trace file
Mon Jun 13 15:31:43 EAT 2011
Thread 1 cannot allocate new log, sequence 458011
Checkpoint not complete
Current log# 1 seq# 458010 mem# 0: +SCRKDATA01/scrk/onlinelog/group_1.976.728930203
Current log# 1 seq# 458010 mem# 1: +SCRKDATA01/scrk/onlinelog/group_1.978.728931175
Mon Jun 13 15:31:45 EAT 2011
Thread 1 advanced to log sequence 458011 (LGWR switch)
Current log# 3 seq# 458011 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 458011 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:31:54 EAT 2011
Terminating process 3779, due to ORA-4030 raised in ASM I/O path
Mon Jun 13 15:31:54 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_dbw0_3779.trc:
ORA-04030: out of process memory when trying to allocate 1049136 bytes (KSFD vec heap,KSFD contig I/O buf)
Mon Jun 13 15:31:55 EAT 2011
Process startup failed, error stack:
Mon Jun 13 15:31:55 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_psp0_3767.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn5
ORA-27303: additional information: skgpspawn5
Mon Jun 13 15:31:55 EAT 2011
Thread 1 cannot allocate new log, sequence 458012
Checkpoint not complete
Current log# 3 seq# 458011 mem# 0: +SCRKDATA01/scrk/onlinelog/group_3.971.728928961
Current log# 3 seq# 458011 mem# 1: +SCRKDATA01/scrk/onlinelog/group_3.980.728931221
Mon Jun 13 15:31:55 EAT 2011
Errors in file /oracle/admin/scrk/bdump/scrk1_pmon_3757.trc:
ORA-00471: DBWR process terminated with error
Mon Jun 13 15:31:55 EAT 2011
PMON: terminating instance due to error 471
Mon Jun 13 15:31:58 EAT 2011
System state dump is made for local instance
System State dumped to trace file /oracle/admin/scrk/bdump/scrk1_diag_3765.trc
Mon Jun 13 15:32:03 EAT 2011
Shutting down instance (abort)
License high water mark = 307
Mon Jun 13 15:32:05 EAT 2011
Termination issued to instance processes. Waiting for the processes to exit
Instance terminated by PMON, pid = 3757
Mon Jun 13 15:32:08 EAT 2011
Instance terminated by USER, pid = 10948
Mon Jun 13 15:32:13 EAT 2011
Starting ORACLE instance (normal)
Mon Jun 13 15:32:13 EAT 2011
通过查询metalink给出了以下解决方案，目前系统交换分区跟内存一样都是8G，就没有扩充；最后通过在不过度影响数据库性能的方式减小SGA给系统保留更多的内存。有点郁闷的是据说HP UNIX 11.31很吃内存，但是也不能保留3个多G都不够用吧。
ASM ORA-12549: TNS:Operating System Resource Quota Exceeded [ID 738855.1]
--------------------------------------------------------------------------------
Applies to:
Oracle Server - Enterprise Edition - Version: 10.1.0.2 to 11.1.0.7
This problem can occur on any platform.
Symptoms
In the ASM alert.log file the next error was reported:
=========================================================
Sun Sep 14 01:04:38 2008
Errors in file /u01/app/oracle/admin/CLEADB/bdump/cleadb1_arc5_20944.trc:
ORA-00313: open failed for members of log group 2 of thread 1
ORA-00312: online log 2 thread 1: '+DISKGROUPMIRROR/cleadb/redot102.log'
ORA-17503: ksfdopn:2 Failed to open file +DISKGROUPMIRROR/cleadb/redot102.log
ORA-12549: TNS:operating system resource quota exceeded
Sun Sep 14 01:04:38 20
=========================================================
Cause
System (Unix or Linux) was running out of swap therefore the next error was reported:
The ORA-12549: TNS:operating system resource quota exceeded error was raised due to the OS was
running out of swap space.
Solution
Please ask your SA to resize the Swap area following the next formula:
If RAM = 1024MB to 2048Mb
then 1.5 times RAM
elseif RAM > 2048MB and then match RAM
else RAM > 8192MB
then .75 times RAM
InnoDB Redo Logs 및 Undo Logs의 역할을 설명하십시오.Apr 15, 2025 am 12:16 AMInnoDB는 Redologs 및 Undologs를 사용하여 데이터 일관성과 신뢰성을 보장합니다. 1. Redologs는 사고 복구 및 거래 지속성을 보장하기 위해 데이터 페이지 수정을 기록합니다. 2. 결점은 원래 데이터 값을 기록하고 트랜잭션 롤백 및 MVCC를 지원합니다.
설명 출력 (유형, 키, 행, 추가)에서 찾아야 할 주요 메트릭은 무엇입니까?Apr 15, 2025 am 12:15 AM설명 명령에 대한 주요 메트릭에는 유형, 키, 행 및 추가가 포함됩니다. 1) 유형은 쿼리의 액세스 유형을 반영합니다. 값이 높을수록 Const와 같은 효율이 높아집니다. 2) 키는 사용 된 인덱스를 표시하고 NULL은 인덱스가 없음을 나타냅니다. 3) 행은 스캔 한 행의 수를 추정하여 쿼리 성능에 영향을 미칩니다. 4) Extra는 최적화해야한다는 Filesort 프롬프트 사용과 같은 추가 정보를 제공합니다.
설명에서 임시 상태를 사용하고 피하는 방법은 무엇입니까?Apr 15, 2025 am 12:14 AMTemporary를 사용하면 MySQL 쿼리에 임시 테이블을 생성해야 할 필요성이 있으며, 이는 별개의, 그룹 비 또는 비 인덱스 열을 사용하여 순서대로 발견됩니다. 인덱스 발생을 피하고 쿼리를 다시 작성하고 쿼리 성능을 향상시킬 수 있습니다. 구체적으로, 설명 출력에 사용되는 경우, MySQL은 쿼리를 처리하기 위해 임시 테이블을 만들어야 함을 의미합니다. 이것은 일반적으로 다음과 같은 경우에 발생합니다. 1) 별개 또는 그룹을 사용할 때 중복 제거 또는 그룹화; 2) OrderBy가 비 인덱스 열이 포함되어있을 때 정렬하십시오. 3) 복잡한 하위 쿼리 또는 조인 작업을 사용하십시오. 최적화 방법은 다음과 같습니다. 1) Orderby 및 GroupB
다른 SQL 트랜잭션 격리 수준 (커밋되지 않은 읽기, 읽기, 커밋 가능한 읽기, 반복 가능한 읽기, 시리얼이즈 가능) 및 MySQL/innoDB에서의 의미를 설명하십시오.Apr 15, 2025 am 12:11 AMMySQL/InnoDB는 4 개의 트랜잭션 격리 수준을 지원합니다. Readuncommitted, ReadCommitted, ReturableRead 및 Serializable. 1. READUCMITTED는 커밋되지 않은 데이터를 읽을 수 있으므로 더러운 판독 값을 유발할 수 있습니다. 2. ReadCommitted는 더러운 읽기를 피하지만 반복 할 수없는 독서가 발생할 수 있습니다. 3. RepeatableRead는 더러운 읽기와 반복 할 수없는 독서를 피하는 기본 레벨이지만 팬텀 독서가 발생할 수 있습니다. 4. 직렬화 가능한 것은 모든 동시성 문제를 피하지만 동시성을 줄입니다. 적절한 격리 수준을 선택하려면 균형 잡힌 데이터 일관성 및 성능 요구 사항이 필요합니다.
MySQL 대 기타 데이터베이스 : 옵션 비교Apr 15, 2025 am 12:08 AMMySQL은 웹 응용 프로그램 및 컨텐츠 관리 시스템에 적합하며 오픈 소스, 고성능 및 사용 편의성에 인기가 있습니다. 1) PostgreSQL과 비교하여 MySQL은 간단한 쿼리 및 높은 동시 읽기 작업에서 더 잘 수행합니다. 2) Oracle과 비교할 때 MySQL은 오픈 소스와 저렴한 비용으로 인해 중소 기업에서 더 인기가 있습니다. 3) Microsoft SQL Server와 비교하여 MySQL은 크로스 플랫폼 응용 프로그램에 더 적합합니다. 4) MongoDB와 달리 MySQL은 구조화 된 데이터 및 트랜잭션 처리에 더 적합합니다.
MySQL Index Cardinality는 쿼리 성능에 어떤 영향을 미칩니 까?Apr 14, 2025 am 12:18 AMMySQL Index Cardinality는 쿼리 성능에 중대한 영향을 미칩니다. 1. 높은 카디널리티 인덱스는 데이터 범위를보다 효과적으로 좁히고 쿼리 효율성을 향상시킬 수 있습니다. 2. 낮은 카디널리티 인덱스는 전체 테이블 스캔으로 이어질 수 있으며 쿼리 성능을 줄일 수 있습니다. 3. 관절 지수에서는 쿼리를 최적화하기 위해 높은 카디널리티 시퀀스를 앞에 놓아야합니다.
MySQL : 신규 사용자를위한 리소스 및 튜토리얼Apr 14, 2025 am 12:16 AMMySQL 학습 경로에는 기본 지식, 핵심 개념, 사용 예제 및 최적화 기술이 포함됩니다. 1) 테이블, 행, 열 및 SQL 쿼리와 같은 기본 개념을 이해합니다. 2) MySQL의 정의, 작업 원칙 및 장점을 배우십시오. 3) 인덱스 및 저장 절차와 같은 기본 CRUD 작업 및 고급 사용량을 마스터합니다. 4) 인덱스의 합리적 사용 및 최적화 쿼리와 같은 일반적인 오류 디버깅 및 성능 최적화 제안에 익숙합니다. 이 단계를 통해 MySQL의 사용 및 최적화를 완전히 파악할 수 있습니다.
실제 MySQL : 예 및 사용 사례Apr 14, 2025 am 12:15 AMMySQL의 실제 응용 프로그램에는 기본 데이터베이스 설계 및 복잡한 쿼리 최적화가 포함됩니다. 1) 기본 사용 : 사용자 정보 삽입, 쿼리, 업데이트 및 삭제와 같은 사용자 데이터를 저장하고 관리하는 데 사용됩니다. 2) 고급 사용 : 전자 상거래 플랫폼의 주문 및 재고 관리와 같은 복잡한 비즈니스 로직을 처리합니다. 3) 성능 최적화 : 인덱스, 파티션 테이블 및 쿼리 캐시를 사용하여 합리적으로 성능을 향상시킵니다.
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