Database Reference
In-Depth Information
There's more...
Pgpool-II is middleware that can perform the following major functions:
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Connection pooling
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Load balancing
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Replication management
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Parallel query
I've ignored some of the other features here, so I need to say a few words about my thoughts
on that. Connection pooling is also provided by pgbouncer. Replication management features
are probably superseded by other forms of replication covered here.
The parallel query features are regrettably out-classed by popular products, such as
Greenplum, which offers a free-to-use edition that performs very well, and is in production
use at a number of PostgreSQL user sites. Visit the following URL:
http://www.greenplum.com/products/single-node/
Upgrading (minor)
Minor release upgrades are released regularly by all software developers and PostgreSQL has
its share of corrections. When a minor release occurs, we bump the last number, usually by one.
So ,the first release of major release 9.0 is 9.0.0. The first set of bug fixes is 9.0.1, then 9.0.2,
and so on.
This recipe is about moving from minor release to minor release.
Getting ready
First, get hold of the new release, either by downloading the source or downloading
fresh binaries.
How to do it...
In most cases, PostgreSQL aims for minor releases to be trivial upgrades. We make great
efforts to keep the on-disk format the same for both data/index files and transaction log
(WAL) files. Some temporary files can sometimes change.
The upgrade process is as follows:
1. Read the release notes to see if there are any special actions that need to be taken
for this release.
