Commit 402feec6 authored by Robert Speicher's avatar Robert Speicher

Update MySQL docs

[ci skip]
parent a7daf33b
...@@ -64,7 +64,7 @@ v 8.4.0 (unreleased) ...@@ -64,7 +64,7 @@ v 8.4.0 (unreleased)
- Remove leading comma on award emoji when the user is the first to award the emoji (Zeger-Jan van de Weg) - Remove leading comma on award emoji when the user is the first to award the emoji (Zeger-Jan van de Weg)
- Add build artifacts browser - Add build artifacts browser
- Improve UX in builds artifacts browser - Improve UX in builds artifacts browser
- Change type of `data` column in `events` table when using MySQL - Increase default size of `data` column in `events` table when using MySQL
v 8.3.4 v 8.3.4
- Use gitlab-workhorse 0.5.4 (fixes API routing bug) - Use gitlab-workhorse 0.5.4 (fixes API routing bug)
......
...@@ -55,19 +55,22 @@ We do not recommend using MySQL due to various issues. For example, case [(in)se ...@@ -55,19 +55,22 @@ We do not recommend using MySQL due to various issues. For example, case [(in)se
## MySQL strings limits ## MySQL strings limits
After installation or upgrade is done, remember to run `add_limits_mysql` rake task: After installation or upgrade, remember to run the `add_limits_mysql` Rake task:
``` ```
bundle exec rake add_limits_mysql bundle exec rake add_limits_mysql
``` ```
The `text` type in MySQL have different size limit than `text` type in PostgreSQL. In MySQL `text` columns are limited The `text` type in MySQL has a different size limit than the `text` type in
to ~65kB, where in PostgreSQL `text` columns are limited up to ~1GB! PostgreSQL. In MySQL `text` columns are limited to ~65kB, whereas in PostgreSQL
`text` columns are limited up to ~1GB!
`add_limits_mysql` rake task converts some important `text` columns in GitLab database to `longtext` which can persist The `add_limits_mysql` Rake task converts some important `text` columns in the
up to 4GB characters (may be less if the value contains multibyte characters). GitLab database to `longtext` columns, which can persist values of up to 4GB
(sometimes less if the value contains multibyte characters).
Details can be found in [PostgreSQL manual][postgres-text-type] and in [MySQL manual][mysql-text-types]. Details can be found in the [PostgreSQL][postgres-text-type] and
[MySQL][mysql-text-types] manuals.
[postgres-text-type]: http://www.postgresql.org/docs/9.1/static/datatype-character.html [postgres-text-type]: http://www.postgresql.org/docs/9.1/static/datatype-character.html
[mysql-text-types]: http://dev.mysql.com/doc/refman/5.7/en/string-type-overview.html [mysql-text-types]: http://dev.mysql.com/doc/refman/5.7/en/string-type-overview.html
...@@ -14,4 +14,4 @@ Depending on the installation method and your GitLab version, there are multiple ...@@ -14,4 +14,4 @@ Depending on the installation method and your GitLab version, there are multiple
## Miscellaneous ## Miscellaneous
- [MySQL to PostgreSQL](mysql_to_postgresql.md) guides you through migrating your database from MySQL to PostgreSQL. - [MySQL to PostgreSQL](mysql_to_postgresql.md) guides you through migrating your database from MySQL to PostgreSQL.
- [MySQL installation guide](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/install/database_mysql.md) contains additional informations about configuring GitLab to work with MySQL database. - [MySQL installation guide](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/install/database_mysql.md) contains additional information about configuring GitLab to work with a MySQL database.
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