Commit fe16f7b4 authored by Robert Speicher's avatar Robert Speicher Committed by Robert Speicher

Merge branch 'fix/events-data-limit-for-mysql' into 'master'

Fix limit for `data` column in `events` table when using MySQL

Closes #9084 

See merge request !2486
parent 449ec2bb
......@@ -60,6 +60,9 @@ v 8.4.0 (unreleased)
- Add reporters ability to download and browse build artifacts (Andrew Johnson)
- Autofill referring url in message box when reporting user abuse. (Josh Frye)
- 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
- Improve UX in builds artifacts browser
- Increase default size of `data` column in `events` table when using MySQL
v 8.3.4
- Use gitlab-workhorse 0.5.4 (fixes API routing bug)
......
......@@ -6,5 +6,6 @@ class LimitsToMysql < ActiveRecord::Migration
change_column :merge_request_diffs, :st_diffs, :text, limit: 2147483647
change_column :snippets, :content, :text, limit: 2147483647
change_column :notes, :st_diff, :text, limit: 2147483647
change_column :events, :data, :text, limit: 2147483647
end
end
......@@ -52,3 +52,25 @@ 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, remember to run the `add_limits_mysql` Rake task:
```
bundle exec rake add_limits_mysql
```
The `text` type in MySQL has a different size limit than the `text` type in
PostgreSQL. In MySQL `text` columns are limited to ~65kB, whereas in PostgreSQL
`text` columns are limited up to ~1GB!
The `add_limits_mysql` Rake task converts some important `text` columns in the
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 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
[mysql-text-types]: http://dev.mysql.com/doc/refman/5.7/en/string-type-overview.html
......@@ -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 information about configuring GitLab to work with a MySQL database.
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