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| author | Tomasz Maczukin <tomasz@maczukin.pl> | 2016-01-18 15:52:26 +0100 |
|---|---|---|
| committer | Tomasz Maczukin <tomasz@maczukin.pl> | 2016-01-18 15:53:08 +0100 |
| commit | 06e21d2e49bb6ca01947ab46c1f35d25c1082a0b (patch) | |
| tree | b205a8ccdd758d92c8beb6efe9ecf16c5df85e95 | |
| parent | df8601691b78df0dc9791fec5fa5c3727732aadb (diff) | |
| download | gitlab-ce-06e21d2e49bb6ca01947ab46c1f35d25c1082a0b.tar.gz | |
Add information about PostgreSQL<>MySQL 'text' type differences into to installation docs
| -rw-r--r-- | doc/install/database_mysql.md | 19 | ||||
| -rw-r--r-- | doc/update/README.md | 1 |
2 files changed, 20 insertions, 0 deletions
diff --git a/doc/install/database_mysql.md b/doc/install/database_mysql.md index 513ad69ec26..4a2c699129d 100644 --- a/doc/install/database_mysql.md +++ b/doc/install/database_mysql.md @@ -52,3 +52,22 @@ We do not recommend using MySQL due to various issues. For example, case [(in)se mysql> \q # You are done installing the database and can go back to the rest of the installation. + +## MySQL strings limits + +After installation or upgrade is done, remember to run `add_limits_mysql` rake task: + +``` +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 +to ~65kB, where 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 +up to 4GB characters (may be less if the value contains multibyte characters). + +Details can be found in [PostgreSQL manual][postgres-text-type] and in [MySQL manual][mysql-text-types]. + +[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 diff --git a/doc/update/README.md b/doc/update/README.md index 0472537eeb5..46aec4885e2 100644 --- a/doc/update/README.md +++ b/doc/update/README.md @@ -14,3 +14,4 @@ Depending on the installation method and your GitLab version, there are multiple ## Miscellaneous - [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. |