Wiki source code of PostgreSQL Installation
Version 15.1 by Vincent Massol on 2015/07/28
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| author | version | line-number | content |
|---|---|---|---|
| 1 | {{box cssClass="floatinginfobox" title="**Contents**"}} | ||
| 2 | {{toc/}} | ||
| 3 | {{/box}} | ||
| 4 | |||
| 5 | Follow these instuctions: | ||
| 6 | |||
| 7 | * Download and install [[PostgreSQL>>http://www.postgresql.org/]] | ||
| 8 | * Download the appropriate [[Postgres JDBC41 driver>>http://jdbc.postgresql.org/download.html]]. You can also download it directly from the [[Maven Central Repository>>http://repo1.maven.org/maven2/postgresql/postgresql/]] and copy the JAR into your container's common lib directory or in the XWiki webapp (in ##WEB-INF/lib##) | ||
| 9 | * Start PostgreSQL | ||
| 10 | ** On Mac you could issue the following shell commands to start/stop PostgreSQL 9.1 (adapt to your version and to your setup):((( | ||
| 11 | {{code}} | ||
| 12 | sudo -u postgres /Library/PostgreSQL/9.1/bin/pg_ctl start -D /Library/PostgreSQL/9.1/data | ||
| 13 | sudo -u postgres /Library/PostgreSQL/9.1/bin/pg_ctl stop -D /Library/PostgreSQL/9.1/data | ||
| 14 | {{/code}} | ||
| 15 | ))) | ||
| 16 | * Create the ##xwiki## user and the ##xwiki## database:((( | ||
| 17 | * Using the ##psql## tool:((( | ||
| 18 | In a shell, start the PostgreSQL interactive terminal: {{code}}psql -U <replace_with_your_admin_user_eg_postgres>{{/code}} | ||
| 19 | |||
| 20 | Create the ##xwiki## database: | ||
| 21 | |||
| 22 | {{code language="none"}} | ||
| 23 | CREATE DATABASE xwiki | ||
| 24 | WITH OWNER = <replace_with_your_admin_user_eg_postgres> | ||
| 25 | ENCODING = 'UNICODE' | ||
| 26 | TABLESPACE = pg_default; | ||
| 27 | {{/code}} | ||
| 28 | |||
| 29 | Verify that the ##xwiki## database is listed in the available databases: {{code}}\l{{/code}} | ||
| 30 | |||
| 31 | Connect to the ##xwiki## database: {{code}}\connect xwiki{{/code}} | ||
| 32 | |||
| 33 | Create a ##xwiki## user: {{code language="none"}}CREATE USER xwiki PASSWORD 'xwiki' VALID UNTIL 'infinity';{{/code}} | ||
| 34 | |||
| 35 | Verify that the ##xwiki## user is listed in the available users: {{code language="none"}}\du{{/code}} | ||
| 36 | |||
| 37 | Give all the permissions to the ##xwiki## user: {{code}}GRANT ALL ON SCHEMA public TO xwiki;{{/code}} | ||
| 38 | ))) | ||
| 39 | * Using the ##createuser## and ##createdb## programs:((( | ||
| 40 | {{info}} | ||
| 41 | Make sure that the ##createuser## and ##createdb## programs are in your ##$PATH##. The example below also assumes that the ##postgres## user exists in your setup (this is the default on Linux). | ||
| 42 | {{/info}} | ||
| 43 | |||
| 44 | Create the ##xwiki## user: {{code}}createuser xwiki -S -D -R -P -Upostgres{{/code}} | ||
| 45 | |||
| 46 | Create the ##xwiki## database: {{code}}createdb xwiki -Eunicode -Oxwiki -Upostgres{{/code}} | ||
| 47 | |||
| 48 | Note that if you need to remove this DB at some point you can issue:{{code}}dropdb -Upostgres xwiki{{/code}} | ||
| 49 | ))) | ||
| 50 | ))) | ||
| 51 | * Tell XWiki to use this database. To do this, edit the ##WEB-INF/hibernate.cfg.xml## file where you have expanded the XWiki WAR file and uncomment the PostgreSQL part. Make sure to review the ##connection.url## property. For example a typical value would be:{{code}}<property name="connection.url">jdbc:postgresql://localhost:5432/xwiki</property>{{/code}} | ||
| 52 | |||
| 53 | = Multiwiki Status = | ||
| 54 | |||
| 55 | Prior to XWiki 4.5M1, multiwiki mode was not fully working on PostgreSQL. Since XWiki 4.5M1, we've made it work in ##schema## mode (i.e. a subwiki is represented as a Schema in the database). However it's not working in ##database## mode for the moment (i.e. a subwiki is represented as a Catalog in the database) because the PostGreSQL JDBC Driver doesn't support yet the ##setCatalog## method. | ||
| 56 | |||
| 57 | The mode used is controlled by a property in ##hibernate.cfg.xml##: | ||
| 58 | |||
| 59 | {{code}} | ||
| 60 | <property name="xwiki.virtual_mode">schema|database</property> | ||
| 61 | {{/code}} | ||
| 62 | |||
| 63 | = Performance Tuning = | ||
| 64 | |||
| 65 | In several cases, for example when rolling back a document to a previous version, your postgres log will show something similar: | ||
| 66 | |||
| 67 | {{code}} | ||
| 68 | 2013-04-03 18:44:36 EEST LOG: checkpoints are occurring too frequently (22 seconds apart) | ||
| 69 | 2013-04-03 18:44:36 EEST HINT: Consider increasing the configuration parameter "checkpoint_segments". | ||
| 70 | 2013-04-03 18:46:05 EEST LOG: checkpoints are occurring too frequently (6 seconds apart) | ||
| 71 | 2013-04-03 18:46:05 EEST HINT: Consider increasing the configuration parameter "checkpoint_segments". | ||
| 72 | |||
| 73 | {{/code}} | ||
| 74 | |||
| 75 | This can result in slow DB performance. If using a production environment, you must set the "checkpoint_segments" parameter from your PostgreSQL configuration. | ||
| 76 | More links related to this: | ||
| 77 | * http://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server | ||
| 78 | * http://www.postgresql.org/docs/current/static/runtime-config-wal.html#RUNTIME-CONFIG-WAL-CHECKPOINTS | ||
| 79 | |||
| 80 | = Troubleshooting = | ||
| 81 | |||
| 82 | == Method org.postgresql.jdbc4.Jdbc4Connection.isValid(int) is not yet implemented == | ||
| 83 | |||
| 84 | Versions of the Postgres JDBC driver older than 9.2 do not support that method. Try to update the ##postgresql-*.jar## | ||
| 85 | |||
| 86 | * if installed from debian package, try to update at least to the version from jessy | ||
| 87 | ** for example download from https://packages.debian.org/jessie/all/libpostgresql-jdbc-java/download | ||
| 88 | ** then use ##dpkg ~--install libpostgresql-jdbc-java_9.2-1002-1_all.deb## to install | ||
| 89 | ** | ||
| 90 | * alternatively if you use tomcat8, try downgrading to tomcat7 | ||
| 91 | * otherwise find the ##postgresql-*.jar## in your webapp and replace it by a newer version downloaded from https://jdbc.postgresql.org/download.html | ||
| 92 | |||
| 93 | Restart the server to apply the changes. |
