36 lines
1023 B
Markdown
36 lines
1023 B
Markdown
+++
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date = "2011-11-22"
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title = "Upgrade postgresql-8.4 to postgresql-9.1 on debian"
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tags = ["Ubuntu", "debian", "dba", "postgres", "postgresql"]
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slug = "upgrade-postgresql-8-4-to-postgresql-9-1-on-debian"
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+++
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Today I upgraded a production PostgreSQL 8.4 database to version 9.1. This was on a Debian server.
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~
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The first step is to make a full dump of your data. I personally like to store that dump somewhere safe before upgrading. As root:
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``` shell
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su - postgres
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pg_dumpall > dump.sql
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exit
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cp ~postgres/dump.sql /root/
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```
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Now you can safely remove the postgresql-8.4 and install postgresql-9.1:
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``` shell
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aptitude purge postgresql-8.4
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aptitude install postgresql-9.1
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```
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Next check the postgresql configuration in `/etc/postgresql/9.1/main`. If you make any changes, make sure to restart postgres with `/etc/init.d/postgresql restart`.
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Postgresql 9.1 is now up and running, let's import our data back into it.
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``` shell
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su - postgres
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psql < dump.sql
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```
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That's all. You're now fully upgraded to PostgreSQL 9.1.
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