sitemap

RSS地图

收藏本站

设为首页

Oracle研究中心

当前位置:Oracle研究中心 > 运维DBA > Linux >

【学习笔记】开启LINUX平台ORACLE AIO功能详细步骤

时间:2016-10-18 21:41   来源:Oracle研究中心   作者:网络   点击:

天萃荷净 运维DBA反映当前生产环境Oracle数据库IO遇到瓶颈.需要开启Oracle AIO功能。结合案例详细讲解如何开启ORACLE AIO功能详细步骤。
当IO遇到瓶颈的时候.我们首先会去检查AIO功能是否生效.在默认创建库的时候.使用raw方式的数据文件aio功能是开启了的.使用文件系统的数据文件.aio功能是没有开启的.在linux平台文件系统方式下.很多人在创建数据库的时候都没有手动开启aio.才会导致一些IO相关的等待事件的出现.下面就是测试LINUX下AIO功能是否开启。

OS :RHEL 4.8 DB:10.2.0.5.10/9.2.0.8

1,查询AIO软件是否安装


[oracle10g@rhel4 ~]$ rpm -qa|grep aio
libaio-0.3.105-2
libaio-devel-0.3.105-2
libaio-0.3.105-2
libaio-devel-0.3.105-2

2.查看系统是否启用AIO


[oracle10g@rhel4 ~]$ cat /proc/slabinfo | grep kio
kioctx                21     30    384   10    1 : tunables   54   27    8 : slabdata      3      3      0
kiocb                  0      0    256   15    1 : tunables  120   60    8 : slabdata      0      0      0
kiocb前2个值都是0.但是并不一定表示没有启用AIO功能.如果ORACLE数据文件使用ASM.可能启用了AIO,如果是文件系统肯定没有启用AIO

3.查看ORACLE是否支持AIO


[oracle10g@rhel4 ~]$ /usr/bin/ldd $ORACLE_HOME/bin/oracle | grep libaio
        libaio.so.1 => /usr/lib64/libaio.so.1 (0x0000003447a00000)
此处说明ORACLE软件已经加载AIO功能。10GR2开始默认已经加载了.ORACLE 9I中默认是没有开启的.关于ORACLE 9I开启AIO功能.见最后部分

4.查询ORACLE相当参数是否配置


oracleplus.net>select name from v$dbfile;

NAME
--------------------------------------------------------------------------------
/datafile/orcl10g/orcl10g/users01.dbf
/datafile/orcl10g/orcl10g/sysaux01.dbf
/datafile/orcl10g/orcl10g/undotbs01.dbf
/datafile/orcl10g/orcl10g/system01.dbf
此处使用的文件系统.文件系统的AIO由参数filesystemio_options控制.而不受disk_asynch_io控制.filesystemio_options为none表示不启用.
为asynch表示启用异步IO.为directIO表示启用直接IO.为setall时表示启用直接IO与AIO.建议更改为SETALL

oracleplus.net>show parameter disk

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
asm_diskgroups                       string
asm_diskstring                       string
disk_asynch_io                       boolean     TRUE
如果数据文件使用的是RAW或者ASM中.AIO功能由disk_asynch_io来控制.因为ASM直接绕过文件系统层。
oracleplus.net>show parameter filesystem

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
filesystemio_options                 string      NONE
此处为NONE代表没有启用AIO.再加上数据文件使用文件系统.所以整个环境没有启用AIO功能.

6.strace dbwr进程查看是否启用aio功能


6.1 没用启用aio的dbwr进程的trace内容

12:29:42.435268 pwrite(19, "&242)200t01624206#"..., 8192, 335872) = 8192
12:29:42.438044 times(NULL)             = 429715112
12:29:42.438065 times(NULL)             = 429715112
12:29:42.438081 pwrite(19, "&24221120000016142545"..., 8192, 1122304) = 8192
12:29:42.438371 times(NULL)             = 429715112
12:29:42.438392 times(NULL)             = 429715112
12:29:42.438407 pwrite(19, "2242216200376/162424210t4>1334##"..., 8192, 1163264) = 8192
12:29:42.438692 times(NULL)             = 429715112
12:29:42.438713 times(NULL)             = 429715112
12:29:42.438729 pwrite(19, "2242t5200t016242042336S1301##"..., 8192, 11436032) = 8192
12:29:42.438986 times(NULL)             = 429715112
12:29:42.439004 times(NULL)             = 429715112
12:29:42.439019 pwrite(21, "6242341t016263022151tl311R#t"..., 8192, 229376) = 8192
12:29:42.439260 times(NULL)             = 429715112
12:29:42.439278 times(NULL)             = 429715112
12:29:42.439293 pwrite(21, "6242$1t01626''231m31107016"..., 8192, 294912) = 8192

6.2 启用aio后的dbwr进程的trace内容

修改成setall后
oracleplus.net>alter system set filesystemio_options=setall scope=spfile;
System altered.

oracleplus.net>startup force;
ORACLE instance started.

Total System Global Area  440401920 bytes
Fixed Size                  2084552 bytes
Variable Size             125829432 bytes
Database Buffers          306184192 bytes
Redo Buffers                6303744 bytes
Database mounted.
Database opened.

12:32:47.648352 semtimedop(622592, 0x7fbfffdff0, 1, {3, 0}) = 0
12:32:50.227300 times(NULL)             = 429733888
12:32:50.227385 semctl(622592, 10, SETVAL, 0x1) = 0
12:32:50.227536 getrusage(RUSAGE_SELF, {ru_utime={0, 6998}, ru_stime={0, 12998}, ...}) = 0
12:32:50.227573 getrusage(RUSAGE_SELF, {ru_utime={0, 6998}, ru_stime={0, 12998}, ...}) = 0
12:32:50.227606 times(NULL)             = 429733888
12:32:50.227631 semtimedop(622592, 0x7fbfffdff0, 1, {0, 420000000}) = 0
12:32:50.229953 times(NULL)             = 429733888
12:32:50.229991 io_submit(182927040512, 1, {...}) = 1
12:32:50.230131 io_getevents(182927040512, 1, 1024, {...}{600, 0}) = 1
这里我们看到了两个函数.io_submit,io_getevents这两个函数就是跟aio相关的

7.关于os上aio参数的配置


[root@11rac1 ~]# echo "fs.aio-max-nr=1048576">>/etc/sysctl.conf;sysctl -p;echo "***********";sysctl -a|grep fs.aio-max
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 2
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.shmall = 2097152
kernel.shmmax = 11036870912
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
fs.aio-max-nr = 1048576
fs.aio-max-nr = 1048576
***********
fs.aio-max-nr = 1048576
ORACLE建议把fs.aio_max_nr的值配置成1048576.不然有可能会遇到一些错误。

8.oracle软件加裁aio的功能


8.1 9i开启aio

[oracle9i@rhel4 lib]$ cd $ORACLE_HOME/rdbms/lib
[oracle9i@rhel4 lib]$ make -f ins_rdbms.mk async_on
如果是关闭使用下面这条命令
[oracle9i@rhel4 lib]$ make -f ins_rdbms.mk async_off
rm -f /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaioi.o
cp /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaio.o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaioi.o

- Linking Oracle
rm -f /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/oracle
gcc  -o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/oracle -L/u01/app/oracle/product/9.2.0/db_1//rdbms/lib/ -L/u01/app/oracle/product/9.2.0/db_1//lib/ -L/u01/app/oracle/product/9.2.0/db_1//lib/stubs/   -Wl,-E `test -f /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaioi.o && echo /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaioi.o` /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/opimai.o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/ssoraed.o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/ttcsoi.o /u01/app/oracle/product/9.2.0/db_1//lib/nautab.o /u01/app/oracle/product/9.2.0/db_1//lib/naeet.o /u01/app/oracle/product/9.2.0/db_1//lib/naect.o /u01/app/oracle/product/9.2.0/db_1//lib/naedhs.o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/config.o  -lserver9 -lodm9 -lskgxp9 -lskgxn9 -lclient9  -lvsn9 -lwtcserver9 -lcommon9 -lgeneric9 /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/defopt.o -lknlopt `if /usr/bin/ar tv /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/libknlopt.a | grep xsyeolap.o > /dev/null 2>&1 ; then echo "-loraolap9" ; fi`  -lslax9 -lpls9  -lplp9 -lserver9 -lclient9  -lvsn9 -lwtcserver9 -lcommon9 -lgeneric9 -lknlopt -lslax9 -lpls9  -lplp9 -ljox9 -lserver9 -locijdbcst9 -lwwg9  `cat /u01/app/oracle/product/9.2.0/db_1//lib/ldflags`    -lnsslb9 -lncrypt9 -lnsgr9 -lnzjs9 -ln9 -lnl9 -lnro9 `cat /u01/app/oracle/product/9.2.0/db_1//lib/ldflags`    -lnsslb9 -lncrypt9 -lnsgr9 -lnzjs9 -ln9 -lnl9 -lmm -lnls9  -lcore9 -lnls9 -lcore9 -lnls9 -lxml9 -lcore9 -lunls9 -lnls9 `cat /u01/app/oracle/product/9.2.0/db_1//lib/ldflags`    -lnsslb9 -lncrypt9 -lnsgr9 -lnzjs9 -ln9 -lnl9 -lnro9 `cat /u01/app/oracle/product/9.2.0/db_1//lib/ldflags`    -lnsslb9 -lncrypt9 -lnsgr9 -lnzjs9 -ln9 -lnl9  -ltrace9 -lnls9  -lcore9 -lnls9 -lcore9 -lnls9 -lxml9 -lcore9 -lunls9 -lnls9 `if /usr/bin/ar tv /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/libknlopt.a | grep "kxmnsd.o" > /dev/null 2>&1 ; then echo " " ; else echo "-lordsdo9"; fi` -lctxc9 -lctx9 -lzx9 -lgx9 -lctx9 -lzx9 -lgx9 -lordimt9 -lnls9  -lcore9 -lnls9 -lcore9 -lnls9 -lxml9 -lcore9 -lunls9 -lnls9 -lsnls9 -lunls9 -lxsd9 -lnls9  -lcore9 -lnls9 -lcore9 -lnls9 -lxml9 -lcore9 -lunls9 -lnls9   `cat /u01/app/oracle/product/9.2.0/db_1//lib/sysliblist` -Wl,-rpath,/u01/app/oracle/product/9.2.0/db_1//lib:/lib:/usr/lib -lm    `cat /u01/app/oracle/product/9.2.0/db_1//lib/sysliblist` -ldl -lm   `test -f /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaioi.o && echo -laio`
mv -f /u01/app/oracle/product/9.2.0/db_1//bin/oracle /u01/app/oracle/product/9.2.0/db_1//bin/oracleO
mv /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/oracle /u01/app/oracle/product/9.2.0/db_1//bin/oracle
chmod 6751 /u01/app/oracle/product/9.2.0/db_1//bin/oracle
[oracle9i@rhel4 lib]$ make -f ins_rdbms.mk ioracle

- Linking Oracle
rm -f /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/oracle
gcc  -o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/oracle -L/u01/app/oracle/product/9.2.0/db_1//rdbms/lib/ -L/u01/app/oracle/product/9.2.0/db_1//lib/ -L/u01/app/oracle/product/9.2.0/db_1//lib/stubs/   -Wl,-E `test -f /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaioi.o && echo /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaioi.o` /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/opimai.o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/ssoraed.o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/ttcsoi.o /u01/app/oracle/product/9.2.0/db_1//lib/nautab.o /u01/app/oracle/product/9.2.0/db_1//lib/naeet.o /u01/app/oracle/product/9.2.0/db_1//lib/naect.o /u01/app/oracle/product/9.2.0/db_1//lib/naedhs.o /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/config.o  -lserver9 -lodm9 -lskgxp9 -lskgxn9 -lclient9  -lvsn9 -lwtcserver9 -lcommon9 -lgeneric9 /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/defopt.o -lknlopt `if /usr/bin/ar tv /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/libknlopt.a | grep xsyeolap.o > /dev/null 2>&1 ; then echo "-loraolap9" ; fi`  -lslax9 -lpls9  -lplp9 -lserver9 -lclient9  -lvsn9 -lwtcserver9 -lcommon9 -lgeneric9 -lknlopt -lslax9 -lpls9  -lplp9 -ljox9 -lserver9 -locijdbcst9 -lwwg9  `cat /u01/app/oracle/product/9.2.0/db_1//lib/ldflags`    -lnsslb9 -lncrypt9 -lnsgr9 -lnzjs9 -ln9 -lnl9 -lnro9 `cat /u01/app/oracle/product/9.2.0/db_1//lib/ldflags`    -lnsslb9 -lncrypt9 -lnsgr9 -lnzjs9 -ln9 -lnl9 -lmm -lnls9  -lcore9 -lnls9 -lcore9 -lnls9 -lxml9 -lcore9 -lunls9 -lnls9 `cat /u01/app/oracle/product/9.2.0/db_1//lib/ldflags`    -lnsslb9 -lncrypt9 -lnsgr9 -lnzjs9 -ln9 -lnl9 -lnro9 `cat /u01/app/oracle/product/9.2.0/db_1//lib/ldflags`    -lnsslb9 -lncrypt9 -lnsgr9 -lnzjs9 -ln9 -lnl9  -ltrace9 -lnls9  -lcore9 -lnls9 -lcore9 -lnls9 -lxml9 -lcore9 -lunls9 -lnls9 `if /usr/bin/ar tv /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/libknlopt.a | grep "kxmnsd.o" > /dev/null 2>&1 ; then echo " " ; else echo "-lordsdo9"; fi` -lctxc9 -lctx9 -lzx9 -lgx9 -lctx9 -lzx9 -lgx9 -lordimt9 -lnls9  -lcore9 -lnls9 -lcore9 -lnls9 -lxml9 -lcore9 -lunls9 -lnls9 -lsnls9 -lunls9 -lxsd9 -lnls9  -lcore9 -lnls9 -lcore9 -lnls9 -lxml9 -lcore9 -lunls9 -lnls9   `cat /u01/app/oracle/product/9.2.0/db_1//lib/sysliblist` -Wl,-rpath,/u01/app/oracle/product/9.2.0/db_1//lib:/lib:/usr/lib -lm    `cat /u01/app/oracle/product/9.2.0/db_1//lib/sysliblist` -ldl -lm   `test -f /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/skgaioi.o && echo -laio`
mv -f /u01/app/oracle/product/9.2.0/db_1//bin/oracle /u01/app/oracle/product/9.2.0/db_1//bin/oracleO
mv /u01/app/oracle/product/9.2.0/db_1//rdbms/lib/oracle /u01/app/oracle/product/9.2.0/db_1//bin/oracle
chmod 6751 /u01/app/oracle/product/9.2.0/db_1//bin/oracle
[oracle9i@rhel4 lib]$ which ldd
/usr/bin/ldd
[oracle9i@rhel4 lib]$ ldd $ORACLE_HOME/bin/oracle|grep aio
        libaio.so.1 => /usr/lib64/libaio.so.1 (0x0000003447a00000)

8.2 10G加载aio

  [oracle10g@rhel4 lib]$ cd $ORACLE_HOME/rdbms/lib
[oracle10g@rhel4 lib]$ ln -s /usr/lib/libaio.so.1 skgaio.o
[oracle10g@rhel4 lib]$ make PL_ORALIBS=-laio -f ins_rdbms.mk async_on
rm -f /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/skgaioi.o
cp /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/skgaio.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/skgaioi.o
chmod 755 /u01/app/oracle/product/10.2.0/db_1/bin

- Linking Oracle
rm -f /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/oracle
gcc  -o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/oracle -L/u01/app/oracle/product/10.2.0/db_1/rdbms/lib/ -L/u01/app/oracle/product/10.2.0/db_1/lib/ -L/u01/app/oracle/product/10.2.0/db_1/lib/stubs/   -Wl,-E `test -f /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/sskgpsmti.o && echo /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/sskgpsmti.o` /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/opimai.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/ssoraed.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/ttcsoi.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/defopt.o  -Wl,--whole-archive -lperfsrv10 -Wl,--no-whole-archive /u01/app/oracle/product/10.2.0/db_1/lib/nautab.o /u01/app/oracle/product/10.2.0/db_1/lib/naeet.o /u01/app/oracle/product/10.2.0/db_1/lib/naect.o /u01/app/oracle/product/10.2.0/db_1/lib/naedhs.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/config.o  -lserver10 -lodm10 -lnnet10 -lskgxp10 -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 -lhasgen10 -lcore10 -lskgxn2 -locr10 -locrb10 -locrutl10 -lhasgen10 -lcore10 -lskgxn2   -lclient10  -lvsn10 -lcommon10 -lgeneric10 -lknlopt `if /usr/bin/ar tv /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/libknlopt.a | grep xsyeolap.o > /dev/null 2>&1 ; then echo "-loraolap10" ; fi` -lslax10 -lpls10  -lplp10 -lserver10 -lclient10  -lvsn10 -lcommon10 -lgeneric10 `if [ -f /u01/app/oracle/product/10.2.0/db_1/lib/libavserver10.a ] ; then echo "-lavserver10" ; else echo "-lavstub10"; fi` `if [ -f /u01/app/oracle/product/10.2.0/db_1/lib/libavclient10.a ] ; then echo "-lavclient10" ; fi` -lknlopt -lslax10 -lpls10  -lplp10 -ljox10 -lserver10 -lclsra10 -ldbcfg10 -locijdbcst10 -lwwg  `cat /u01/app/oracle/product/10.2.0/db_1/lib/ldflags`    -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lnro10 `cat /u01/app/oracle/product/10.2.0/db_1/lib/ldflags`    -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lmm -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 `cat /u01/app/oracle/produOracleoracleplus.netct/10.2.0/db_1/lib/ldflags`    -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lnro10 `cat /u01/app/oracle/product/10.2.0/db_1/lib/ldflags`    -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10   -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 `if /usr/bin/ar tv /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/libknlopt.a | grep "kxmnsd.o" > /dev/null 2>&1 ; then echo " " ; else echo "-lordsdo10"; fi` -lctxc10 -lctx10 -lzx10 -lgx10 -lctx10 -lzx10 -lgx10 -lordimt10 -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 -lsnls10 -lunls10  -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 -laio    `cat /u01/app/oracle/product/10.2.0/db_1/lib/sysliblist` -Wl,-rpath,/u01/app/oracle/product/10.2.0/db_1/lib -lm    `cat /u01/app/oracle/product/10.2.0/db_1/lib/sysliblist` -ldl -lm   -L/u01/app/oracle/product/10.2.0/db_1/lib
/u01/app/oracle/product/10.2.0/db_1/lib//libcore10.a(lcd.o)(.text+0xb71): In function `lcdprm':
: warning: the `gets' function is dangerous and should not be used.
mv -f /u01/app/oracle/product/10.2.0/db_1/bin/oracle /u01/app/oracle/product/10.2.0/db_1/bin/oracleO
mv /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/oracle /u01/app/oracle/product/10.2.0/db_1/bin/oracle
chmod 6751 /u01/app/oracle/product/10.2.0/db_1/bin/oracle
 
  如果不做LN这一步会报下面的错误
  [oracle10g@rhel4 lib]$ make PL_ORALIBS=-laio -f ins_rdbms.mk async_on
rm -f /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/skgaioi.o
cp /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/skgaio.o /u01/app/oracle/product/10.2.0/db_1/rdbms/lib/skgaioi.o
cp: cannot stat `/u01/app/oracle/product/10.2.0/db_1/rdbms/lib/skgaio.o': No such file or directory
make: *** [do_async_on] Error 1
本文固定链接: http://www.htz.pw/2013/05/01/linux%e5%b9%b3%e5%8f%b0oracle-aio%e5%8a%9f%e8%83%bd%e6%b5%8b%e8%af%95.html | 认真就输

--------------------------------------ORACLE-DBA----------------------------------------

最权威、专业的Oracle案例资源汇总之【学习笔记】开启LINUX平台ORACLE AIO功能详细步骤

本文由大师惜分飞原创分享,网址:http://www.oracleplus.net/arch/999.html

Oracle研究中心

关键词:

LINUX平台ORACLE AIO功能测试

Oralce aio功能的使用方法