70985aa19b
When displaying the project pipelines dashboard we display a few tabs
for different pipeline states. For every such tab we count the number of
pipelines that belong to it. For large projects such as GitLab CE this
means having to count over 80 000 rows, which can easily take between 70
and 100 milliseconds per query.
To improve this we apply a technique we already use for search results:
we limit the number of rows to count. The current limit is 1000, which
means that if more than 1000 rows are present for a state we will show
"1000+" instead of the exact number. The SQL queries used for this
perform much better than a regular COUNT, even when a project has a lot
of pipelines.
Prior to these changes we would end up running a query like this:
SELECT COUNT(*)
FROM ci_pipelines
WHERE project_id = 13083
AND status IN ('success', 'failed', 'canceled')
This would produce a plan along the lines of the following:
Aggregate (cost=3147.55..3147.56 rows=1 width=8) (actual time=501.413..501.413 rows=1 loops=1)
Buffers: shared hit=17116 read=861 dirtied=2
-> Index Only Scan using index_ci_pipelines_on_project_id_and_ref_and_status_and_id on ci_pipelines (cost=0.56..2984.14 rows=65364 width=0) (actual time=0.095..490.263 rows=80388 loops=1)
Index Cond: (project_id = 13083)
Filter: ((status)::text = ANY ('{success,failed,canceled}'::text[]))
Rows Removed by Filter: 2894
Heap Fetches: 353
Buffers: shared hit=17116 read=861 dirtied=2
Planning time: 1.409 ms
Execution time: 501.519 ms
Using the LIMIT count technique we instead run the following query:
SELECT COUNT(*)
FROM (
SELECT 1
FROM ci_pipelines
WHERE project_id = 13083
AND status IN ('success', 'failed', 'canceled')
LIMIT 1001
) for_count
This query produces the following plan:
Aggregate (cost=58.77..58.78 rows=1 width=8) (actual time=1.726..1.727 rows=1 loops=1)
Buffers: shared hit=169 read=15
-> Limit (cost=0.56..46.25 rows=1001 width=4) (actual time=0.164..1.570 rows=1001 loops=1)
Buffers: shared hit=169 read=15
-> Index Only Scan using index_ci_pipelines_on_project_id_and_ref_and_status_and_id on ci_pipelines (cost=0.56..2984.14 rows=65364 width=4) (actual time=0.162..1.426 rows=1001 loops=1)
Index Cond: (project_id = 13083)
Filter: ((status)::text = ANY ('{success,failed,canceled}'::text[]))
Rows Removed by Filter: 9
Heap Fetches: 10
Buffers: shared hit=169 read=15
Planning time: 1.832 ms
Execution time: 1.821 ms
While this query still uses a Filter for the "status" field the number
of rows that it may end up filtering (at most 1001) is small enough that
an additional index does not appear to be necessary at this time.
See https://gitlab.com/gitlab-org/gitlab-ce/issues/43132#note_68659234
for more information.
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|---|---|---|
| .github | ||
| .gitlab | ||
| app | ||
| bin | ||
| builds | ||
| changelogs | ||
| config | ||
| db | ||
| doc | ||
| docker | ||
| fixtures/emojis | ||
| generator_templates | ||
| lib | ||
| locale | ||
| log | ||
| plugins/examples | ||
| public | ||
| qa | ||
| rubocop | ||
| scripts | ||
| shared | ||
| spec | ||
| symbol | ||
| tmp | ||
| vendor | ||
| .babelrc | ||
| .codeclimate.yml | ||
| .csscomb.json | ||
| .eslintignore | ||
| .eslintrc | ||
| .flayignore | ||
| .foreman | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .haml-lint.yml | ||
| .mailmap | ||
| .nvmrc | ||
| .pkgr.yml | ||
| .prettierignore | ||
| .prettierrc | ||
| .rubocop.yml | ||
| .rubocop_todo.yml | ||
| .ruby-version | ||
| .scss-lint.yml | ||
| CHANGELOG.md | ||
| CONTRIBUTING.md | ||
| GITALY_SERVER_VERSION | ||
| GITLAB_PAGES_VERSION | ||
| GITLAB_SHELL_VERSION | ||
| GITLAB_WORKHORSE_VERSION | ||
| Gemfile | ||
| Gemfile.lock | ||
| Gemfile.rails5 | ||
| Gemfile.rails5.lock | ||
| LICENSE | ||
| MAINTENANCE.md | ||
| PROCESS.md | ||
| Procfile | ||
| README.md | ||
| Rakefile | ||
| VERSION | ||
| config.ru | ||
| doc_styleguide.md | ||
| docker-compose.yml | ||
| package.json | ||
| yarn.lock | ||
README.md
GitLab
Test coverage
Ruby
JavaScript
Canonical source
The canonical source of GitLab Community Edition is hosted on GitLab.com.
Open source software to collaborate on code
To see how GitLab looks please see the features page on our website.
- Manage Git repositories with fine grained access controls that keep your code secure
- Perform code reviews and enhance collaboration with merge requests
- Complete continuous integration (CI) and CD pipelines to builds, test, and deploy your applications
- Each project can also have an issue tracker, issue board, and a wiki
- Used by more than 100,000 organizations, GitLab is the most popular solution to manage Git repositories on-premises
- Completely free and open source (MIT Expat license)
Hiring
We're hiring developers, support people, and production engineers all the time, please see our jobs page.
Editions
There are two editions of GitLab:
- GitLab Community Edition (CE) is available freely under the MIT Expat license.
- GitLab Enterprise Edition (EE) includes extra features that are more useful for organizations with more than 100 users. To use EE and get official support please become a subscriber.
Website
On about.gitlab.com you can find more information about:
- Subscriptions
- Consultancy
- Community
- Hosted GitLab.com use GitLab as a free service
- GitLab Enterprise Edition with additional features aimed at larger organizations.
- GitLab CI a continuous integration (CI) server that is easy to integrate with GitLab.
Requirements
Please see the requirements documentation for system requirements and more information about the supported operating systems.
Installation
The recommended way to install GitLab is with the Omnibus packages on our package server. Compared to an installation from source, this is faster and less error prone. Just select your operating system, download the respective package (Debian or RPM) and install it using the system's package manager.
There are various other options to install GitLab, please refer to the installation page on the GitLab website for more information.
You can access a new installation with the login root and password 5iveL!fe, after login you are required to set a unique password.
Contributing
GitLab is an open source project and we are very happy to accept community contributions. Please refer to CONTRIBUTING.md for details.
Licensing
GitLab Community Edition (CE) is available freely under the MIT Expat license.
All third party components incorporated into the GitLab Software are licensed under the original license provided by the owner of the applicable component.
All Documentation content that resides under the doc/ directory of this repository is licensed under Creative Commons: CC BY-SA 4.0.
Install a development environment
To work on GitLab itself, we recommend setting up your development environment with the GitLab Development Kit. If you do not use the GitLab Development Kit you need to install and setup all the dependencies yourself, this is a lot of work and error prone. One small thing you also have to do when installing it yourself is to copy the example development unicorn configuration file:
cp config/unicorn.rb.example.development config/unicorn.rb
Instructions on how to start GitLab and how to run the tests can be found in the getting started section of the GitLab Development Kit.
Software stack
GitLab is a Ruby on Rails application that runs on the following software:
- Ubuntu/Debian/CentOS/RHEL/OpenSUSE
- Ruby (MRI) 2.3
- Git 2.8.4+
- Redis 2.8+
- PostgreSQL (preferred) or MySQL
For more information please see the architecture documentation.
UX design
Please adhere to the UX Guide when creating designs and implementing code.
Third-party applications
There are a lot of third-party applications integrating with GitLab. These include GUI Git clients, mobile applications and API wrappers for various languages.
GitLab release cycle
For more information about the release process see the release documentation.
Upgrading
For upgrading information please see our update page.
Documentation
All documentation can be found on docs.gitlab.com/ce/.
Getting help
Please see Getting help for GitLab on our website for the many options to get help.
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