假设您已经使用自制程序安装和升级Postgres，您可以执行以下步骤。

Stop current Postgres server: launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist Initialize a new 10.1 database: initdb /usr/local/var/postgres10.1 -E utf8 run pg_upgrade (note: change bin version if you're upgrading from something other than below): pg_upgrade -v \ -d /usr/local/var/postgres \ -D /usr/local/var/postgres10.1 \ -b /usr/local/Cellar/postgresql/9.6.5/bin/ \ -B /usr/local/Cellar/postgresql/10.1/bin/ -v to enable verbose internal logging -d the old database cluster configuration directory -D the new database cluster configuration directory -b the old PostgreSQL executable directory -B the new PostgreSQL executable directory Move new data into place: cd /usr/local/var mv postgres postgres9.6 mv postgres10.1 postgres Restart Postgres: launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist Check /usr/local/var/postgres/server.log for details and to make sure the new server started properly. Finally, re-install the rails pg gem gem uninstall pg gem install pg

我建议你花点时间阅读PostgreSQL文档，了解你在上述步骤中所做的事情，以减少挫折。

这对我很有用。

https://gist.github.com/dideler/60c9ce184198666e5ab4

言简意赅。老实说，我的目标不是理解PostgreSQL的精髓，我只想把事情做好。

我的解决方案是将这两种资源结合起来:

https://gist.github.com/tamoyal/2ea1fcdf99c819b4e07d

and

http://www.gab.lc/articles/migration_postgresql_9-3_to_9-4

第二个比第一个更有帮助。也要不要，不要按照步骤去做，因为有些是没有必要的。 此外，如果您不能通过postgres控制台备份数据，您可以使用替代方法，使用pgAdmin 3或其他程序进行备份，就像我在我的案例中所做的那样。

还有，链接:https://help.ubuntu.com/stable/serverguide/postgresql.html 帮助设置postgres用户的加密密码和md5认证。

所有这些都完成后，检查终端中运行的postgres服务器版本:

sudo -u postgres psql postgres

输入密码后在postgres终端运行:

SHOW SERVER_VERSION;

它将输出如下内容:

 server_version 
----------------
 9.4.5

设置和启动postgres我使用命令:

> sudo bash # root
> su postgres # postgres

> /etc/init.d/postgresql start
> /etc/init.d/postgresql stop

然后从文件中恢复数据库:

> psql -f /home/ubuntu_username/Backup_93.sql postgres

或者如果不奏效，试试这个:

> pg_restore --verbose --clean --no-acl --no-owner -h localhost -U postgres -d name_of_database ~/your_file.dump

如果你正在使用Rails做一个bundle exec rake db:migrate后拉代码:)

看来Homebrew现在已经有了解决方案:

$ brew info postgresql
...
==> Caveats
To migrate existing data from a previous major version of PostgreSQL run:
  brew postgresql-upgrade-database
....

假设您已经使用自制程序安装和升级Postgres，您可以执行以下步骤。

Stop current Postgres server: launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist Initialize a new 10.1 database: initdb /usr/local/var/postgres10.1 -E utf8 run pg_upgrade (note: change bin version if you're upgrading from something other than below): pg_upgrade -v \ -d /usr/local/var/postgres \ -D /usr/local/var/postgres10.1 \ -b /usr/local/Cellar/postgresql/9.6.5/bin/ \ -B /usr/local/Cellar/postgresql/10.1/bin/ -v to enable verbose internal logging -d the old database cluster configuration directory -D the new database cluster configuration directory -b the old PostgreSQL executable directory -B the new PostgreSQL executable directory Move new data into place: cd /usr/local/var mv postgres postgres9.6 mv postgres10.1 postgres Restart Postgres: launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist Check /usr/local/var/postgres/server.log for details and to make sure the new server started properly. Finally, re-install the rails pg gem gem uninstall pg gem install pg

我建议你花点时间阅读PostgreSQL文档，了解你在上述步骤中所做的事情，以减少挫折。

Mac通过homebrew:

编译petere/postgresql，

(例如:Brew install peere /postgresql/postgresql-9.6)

删除旧Postgres:

Brew unlink postgresql

编译链接-f postgresql-9.6

如果发生任何错误，不要忘记阅读并遵循每一步的酿造说明。

查看更多信息:https://github.com/petere/homebrew-postgresql