Book Image

Troubleshooting PostgreSQL

Book Image

Troubleshooting PostgreSQL

Overview of this book

Table of Contents (17 chapters)
Troubleshooting PostgreSQL
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Fixing full-text search


After focusing on some highly important and common problems related to indexing, it is time to discuss the most important pitfalls in the area of full-text indexing.

Not using full-text search at all

One of the most common mistakes made is not to use full-text search at all. Many people tend to use LIKE instead of proper, PostgreSQL-style full-text searching. Doing that can open a Pandora's box and result in various performance issues.

To demonstrate the point, some sample text can be loaded. In this case, Shakespeare's Hamlet has been selected, which can be downloaded freely from www.gutenberg.org (an archive of free books). To load the data, end users can turn to curl, just as was shown before in the previous example. PostgreSQL will read the data from the pipe:

test=# CREATE TABLE t_text (payload text);
CREATE TABLE
test=# COPY t_text FROM PROGRAM 'curl http://www.gutenberg.org/cache/epub/2265/pg2265.txt';
COPY 5302

In this example, 5302 lines of text have been loaded...