postgresql v9.2升級到9.3步驟

系統CentOS 6.4 64bit,pgsql9.2版本數據庫目錄爲 /data/pgsql/data

安裝pgsql9.3：

# rpm -ivh http://yum.pgrpms.org/9.3/redhat/rhel-6-x86_64/pgdg-centos93-9.3-1.noarch.rpm

# yum install postgresql93 postgresql93-libs postgresql93-server postgresql93-contrib postgresql93-devel postgresql93-test

更新環境變量 ~/.bash_profile:

PATH=$PATH:$HOME/bin:/usr/pgsql-9.3/bin

編輯 /etc/init.d/postgresql-9.3
修改成預期路徑
PGDATA=/data/pgsql/data93
PGLOG=/data/pgsql/pgstartup.log

建立新數據庫集羣目錄

# mkdir /data/psql/data93
# chown postgres:postgres /data/psql/data93

初始化新數據庫集羣

# su - postgres
-bash-4.1$ /usr/pgsql-9.3/bin/initdb -E utf8 --locale=zh_CN.UTF8 -D /data/pgsql/data93/

中止當先數據庫服務，而後執行升級數據庫命令

-bash-4.1$ /usr/pgsql-9.3/bin/pg_upgrade -d /data/pgsql/data -D /data/pgsql/data93/ \
  -b /usr/pgsql-9.2/bin -B /usr/pgsql-9.3/bin

過程信息以下

Performing Consistency Checks
-----------------------------
Checking cluster versions                                   ok
Checking database user is a superuser                       ok
Checking for prepared transactions                          ok
Checking for reg* system OID user data types                ok
Checking for contrib/isn with bigint-passing mismatch       ok
Creating dump of global objects                             ok
Creating dump of database schemas
                                                            ok
Checking for presence of required libraries                 ok
Checking database user is a superuser                       ok
Checking for prepared transactions                          ok

If pg_upgrade fails after this point, you must re-initdb the
new cluster before continuing.

Performing Upgrade
------------------
Analyzing all rows in the new cluster                       ok
Freezing all rows on the new cluster                        ok
Deleting files from new pg_clog                             ok
Copying old pg_clog to new server                           ok
Setting next transaction ID for new cluster                 ok
Setting oldest multixact ID on new cluster                  ok
Resetting WAL archives                                      ok
Setting frozenxid counters in new cluster                   ok
Restoring global objects in the new cluster                 ok
Adding support functions to new cluster                     ok
Restoring database schemas in the new cluster
                                                            ok
Removing support functions from new cluster                 ok
Copying user relation files
                                                            ok
Setting next OID for new cluster                            ok
Sync data directory to disk                                 ok
Creating script to analyze new cluster                      ok
Creating script to delete old cluster                       ok

Upgrade Complete
----------------
Optimizer statistics are not transferred by pg_upgrade so,
once you start the new server, consider running:
    analyze_new_cluster.sh

Running this script will delete the old cluster's data files:
    delete_old_cluster.sh

把老版本的配置文件，如pg_hba.conf，pg_ident.conf，postgresql.conf直接複製或者同步更新到新版數據庫集羣目錄中

相關升級文檔 /usr/share/doc/postgresql93-9.3.0/README.rpm-dist

升級完成

Add: pg_hba.conf的設置可能會使得pg_upgrade執行時報沒法鏈接數據庫錯誤。這時候能夠把local小節暫時改成trust來解決