Red Hat SummitEste contenido no está disponible en el idioma seleccionado.
12.2. Relinking Oracle 10g to Enable Asynchronous I/O Support
Ensure that for 10g Release 1 and 2 the
libaio and libaio-devel RPMs are installed on the system:
# rpm -q libaio libaio-devel
libaio-0.3.96-5
libaio-devel-0.3.96-5
If you relink Oracle for asynchronous I/O without installing the
libaio RPM, then you will get an error message similar to this one:
SQL> connect / as sysdba
oracleorcl: error while loading shared libraries: libaio.so.1: cannot open \
shared object file: No such file or directory
ERROR:
ORA-12547: TNS:lost contact
The
libaio RPMs provide a native Linux asynchronous I/O API. In other words this is a kernel accelerated asynchronous I/O for the POSIX asynchronous I/O facility.
Note
10g Release 2 is shipped with asynchronous I/O support enabled. This means that 10g Release 2 does not need to be relinked. However, there is a bug in Oracle 10.1.0.2 that causes asynchronous I/O not to be installed correctly which can result in poor DB performance, see Bug:3438751 and Note:270213.1.
To relink Oracle 10g R1 for asynchronous I/O, execute the following commands:
# shutdown Oracle
SQL> shutdown
su - oracle
$ cd $ORACLE_HOME/rdbms/lib
$ make PL_ORALIBS=-laio -f ins_rdbms.mk async_on
If asynchronous I/O needs to be disabled, run the following commands:
# shutdown Oracle
SQL> shutdown
su - oracle
$ cd $ORACLE_HOME/rdbms/lib
$ make -f ins_rdbms.mk async_off
'%20d='M201.5%20305.5c-13.8%200-24.9-11.1-24.9-24.6%200-13.8%2011.1-24.9%2024.9-24.9%2013.6%200%2024.6%2011.1%2024.6%2024.9%200%2013.6-11.1%2024.6-24.6%2024.6zM504%20256c0%20137-111%20248-248%20248S8%20393%208%20256%20119%208%20256%208s248%20111%20248%20248zm-132.3-41.2c-9.4%200-17.7%203.9-23.8%2010-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3%2055.4%2012.5c0%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.3%2024.9-24.9s-11.1-24.9-24.9-24.9c-9.7%200-18%205.8-22.1%2013.8l-61.2-13.6c-3-.8-6.1%201.4-6.9%204.4l-19.1%2086.4c-33.2%201.4-63.1%2011.3-85.5%2026.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9%200-46.3%2046.9-14.4%2062.8-1.1%205-1.7%2010.2-1.7%2015.5%200%2052.6%2059.2%2095.2%20132%2095.2%2073.1%200%20132.3-42.6%20132.3-95.2%200-5.3-.6-10.8-1.9-15.8%2031.3-16%2019.8-62.5-14.9-62.5zM302.8%20331c-18.2%2018.2-76.1%2017.9-93.6%200-2.2-2.2-6.1-2.2-8.3%200-2.5%202.5-2.5%206.4%200%208.6%2022.8%2022.8%2087.3%2022.8%20110.2%200%202.5-2.2%202.5-6.1%200-8.6-2.2-2.2-6.1-2.2-8.3%200zm7.7-75c-13.6%200-24.6%2011.1-24.6%2024.9%200%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.1%2024.9-24.6%200-13.8-11-24.9-24.9-24.9z'/%3e%3c/svg%3e){kind=small}