1）备份9.2的数据

cp -r pgdata /home/postgres/pgdata.bak

2）修改环境变量至新的Postgresql路径

vi ~/.bash_profile

/opt/postgres/pgsql/bin/psql

3）创建新数据库目录

mkdir /drbd/pgdata93

4）初始化数据库

/opt/postgres/pgsql/bin/initdb -E UTF-8 --local=en_US.UTF-8 -D /drbd/pgdata93/

如果升级时报如下错误，--local记得保持一致

lc_collate cluster values do not match: old "en_US.UTF-8",new "zh_CN.utf8"

5）执行升级(pg_upgrade 需要在contrib扩展里面安装，make 并且 make install即自动安装）

/opt/postgres/pgsql/bin/pg_upgrade -d /drbd/pgdata/ -D /drbd/pgdata93/ -b /usr/local/pgsql/bin/ -B /opt/postgres/pgsql/bin/

6）如果报自定义函数库找不到，需要重新编译并拷贝至 $libdir

more loadable_libraries.txt

Could not load library "$libdir/tablefunc"

ERROR: could not access file "$libdir/tablefunc": No such file or directory

Could not load library "$libdir/pgpool-recovery"

ERROR: could not access file "$libdir/pgpool-recovery": No such file or directory

Could not load library "$libdir/uuid-ossp"

ERROR: could not access file "$libdir/uuid-ossp": No such file or directory

Could not load library "$libdir/pg_stat_statements"

ERROR: could not access file "$libdir/pg_stat_statements": No such file or directory

7)注意

可能需要重新安装9.3的pgpool（即用源码在9.3的Postgresql环境下重新安装pgpool）

pgpool-II-3.3.3]$ ./configure --prefix=/home/postgres/opt/pgpool --with-pgsql=/opt/postgres/pgsql/

pgpool安装文件下 sql目录下面的 pgpool-recovery目录编译，才能出现如下.so,编译后拷贝至 $libdir

pgpool-recovery.so

8)启动数据库后，可以执行

/home/postgres/analyze_new_cluster.sh