How to check status of PostgreSQL server Mac OS X
如何判断我的Postgresql服务器是否正在运行？
我收到这条消息：
1 2 3 4 5 | [~/dev/working/sw] sudo bundle EXEC rake db:migrate rake aborted! could NOT CONNECT TO server: Connection refused IS the server running ON host"localhost" AND accepting TCP/IP connections ON port 5432? |
更新：
1 2 3 4 | > which postgres /usr/LOCAL/bin/postgres > pg_ctl -D /usr/LOCAL/bin/postgres -l /usr/LOCAL/bin/postgres/server.log START pg_ctl: could NOT OPEN PID file"/usr/local/bin/postgres/postmaster.pid": NOT a directory |
更新2：
1 2 3 | >pg_ctl -D /usr/LOCAL/var/postgres -l /usr/LOCAL/var/postgres/server.log START server starting sh: /usr/LOCAL/var/postgres/server.log: No such file OR directory |
检查正在运行的进程的最简单方法：
1 | ps auxwww | grep postgres |
并查找看起来像这样的命令(您的版本可能不是8.3)：
1 | /Library/PostgreSQL/8.3/bin/postgres -D /Library/PostgreSQL/8.3/DATA |
要启动服务器，请执行以下操作：
1 | /Library/PostgreSQL/8.3/bin/pg_ctl START -D /Library/PostgreSQL/8.3/DATA -l postgres.log |
您可以运行以下命令来确定postgress是否正在运行：
1 | $ pg_ctl STATUS |
您还需要设置
这是我在postgres的
1 2 3 4 5 6 | export PGDATA='/usr/local/var/postgres' export PGHOST=localhost alias start-pg='pg_ctl -l $PGDATA/server.log start' alias stop-pg='pg_ctl stop -m fast' alias show-pg-STATUS='pg_ctl status' alias restart-pg='pg_ctl reload' |
要让它们生效，请记住如下所示：
1 | $ . ~/.bashrc |
现在，尝试一下，你应该得到这样的东西：
1 2 3 | $ show-pg-STATUS pg_ctl: server IS running (PID: 11030) /usr/LOCAL/Cellar/postgresql/9.2.4/bin/postgres |
你可能没有初始化postgres。
如果使用HomeBrew安装，则必须先运行init，然后才能使用其他内容。
要查看说明，请运行
1 2 3 4 5 6 7 8 9 10 | # CREATE/Upgrade a DATABASE IF this IS your FIRST install, CREATE a DATABASE WITH: initdb /usr/LOCAL/var/postgres -E utf8 TO have launchd START postgresql at login: ln -sfv /usr/LOCAL/opt/postgresql/*.plist ~/Library/LaunchAgents Then to load postgresql now: launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist Or, if you don't want/need launchctl, you can just run: pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start |
一旦你运行了它，它应该说：
Success. You can now start the database server using:
2
pg_ctl -D /usr/LOCAL/var/postgres -l logfile START
如果仍有问题，请检查防火墙。如果你使用像HandsOff这样的好人！它被配置为阻止流量，然后您的页面将不会看到数据库。
从PostgreSQL 9.3开始，您可以使用命令
来自文档：
pg_isready returns 0 to the shell if the server is accepting connections normally, 1 if the server is rejecting connections (for example during startup), 2 if there was no response to the connection attempt, and 3 if no attempt was made (for example due to invalid parameters).
这取决于你的postgresql服务器的安装位置。您可以使用pg_ctl手动启动服务器，如下所示。
1 | pg_ctl -D /usr/LOCAL/var/postgres -l /usr/LOCAL/var/postgres/server.log START |
其他答案中建议的
最好使用另一种方法，例如使用