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diff --git a/doc/administration/monitoring/performance/grafana_configuration.md b/doc/administration/monitoring/performance/grafana_configuration.md
index 4dbe3aed84e..96f1377fb73 100644
--- a/doc/administration/monitoring/performance/grafana_configuration.md
+++ b/doc/administration/monitoring/performance/grafana_configuration.md
@@ -6,85 +6,90 @@ info: To determine the technical writer assigned to the Stage/Group associated w
# Grafana Configuration
-[Grafana](https://grafana.com/) is a tool that allows you to visualize time
-series metrics through graphs and dashboards. GitLab writes performance data to Prometheus
-and Grafana will allow you to query to display useful graphs.
+[Grafana](https://grafana.com/) is a tool that enables you to visualize time
+series metrics through graphs and dashboards. GitLab writes performance data to Prometheus,
+and Grafana allows you to query the data to display useful graphs.
## Installation
-[Omnibus GitLab can help you install Grafana (recommended)](https://docs.gitlab.com/omnibus/settings/grafana.html)
+Omnibus GitLab can [help you install Grafana (recommended)](https://docs.gitlab.com/omnibus/settings/grafana.html)
or Grafana supplies package repositories (Yum/Apt) for easy installation.
See [Grafana installation documentation](https://grafana.com/docs/grafana/latest/installation/)
for detailed steps.
NOTE: **Note:**
Before starting Grafana for the first time, set the admin user
-and password in `/etc/grafana/grafana.ini`. Otherwise, the default password
-will be `admin`.
+and password in `/etc/grafana/grafana.ini`. If you don't, the default password
+is `admin`.
## Configuration
-Login as the admin user. Expand the menu by clicking the Grafana logo in the
-top left corner. Choose 'Data Sources' from the menu. Then, click 'Add new'
-in the top bar.
-
-![Grafana empty data source page](img/grafana_data_source_empty.png)
-
-![Grafana data source configurations](img/grafana_data_source_configuration.png)
+1. Log in to Grafana as the admin user.
+1. Expand the menu by clicking the Grafana logo in the top left corner.
+1. Choose **Data Sources** from the menu.
+1. Click **Add new** in the top bar:
+ ![Grafana empty data source page](img/grafana_data_source_empty.png)
+1. Edit the data source to fit your needs:
+ ![Grafana data source configurations](img/grafana_data_source_configuration.png)
+1. Click **Save**.
## Import Dashboards
-You can now import a set of default dashboards that will give you a good
-start on displaying useful information. GitLab has published a set of default
-[Grafana dashboards](https://gitlab.com/gitlab-org/grafana-dashboards) to get you started. Clone the
-repository or download a zip/tarball, then follow these steps to import each
-JSON file.
-
-Open the dashboard dropdown menu and click 'Import'
-
-![Grafana dashboard dropdown](img/grafana_dashboard_dropdown.png)
-
-Click 'Choose file' and browse to the location where you downloaded or cloned
-the dashboard repository. Pick one of the JSON files to import.
-
-![Grafana dashboard import](img/grafana_dashboard_import.png)
-
-Once the dashboard is imported, be sure to click save icon in the top bar. If
-you do not save the dashboard after importing it will be removed when you
-navigate away.
-
-![Grafana save icon](img/grafana_save_icon.png)
+You can now import a set of default dashboards to start displaying useful information.
+GitLab has published a set of default
+[Grafana dashboards](https://gitlab.com/gitlab-org/grafana-dashboards) to get you started.
+Clone the repository, or download a ZIP file or tarball, then follow these steps to import each
+JSON file individually:
+
+1. Log in to Grafana as the admin user.
+1. Open the dashboard dropdown menu and click **Import**:
+ ![Grafana dashboard dropdown](img/grafana_dashboard_dropdown.png)
+1. Click **Choose file**, and browse to the location where you downloaded or
+ cloned the dashboard repository. Select a JSON file to import:
+ ![Grafana dashboard import](img/grafana_dashboard_import.png)
+1. After the dashboard is imported, click the **Save dashboard** icon in the top bar:
+ ![Grafana save icon](img/grafana_save_icon.png)
+
+ NOTE: **Note:**
+ If you don't save the dashboard after importing it, the dashboard is removed
+ when you navigate away from the page.
Repeat this process for each dashboard you wish to import.
-Alternatively you can automatically import all the dashboards into your Grafana
-instance. See the README of the [Grafana dashboards](https://gitlab.com/gitlab-org/grafana-dashboards)
-repository for more information on this process.
+Alternatively, you can import all the dashboards into your Grafana
+instance. For more information about this process, see the
+[README of the Grafana dashboards](https://gitlab.com/gitlab-org/grafana-dashboards)
+repository.
## Integration with GitLab UI
> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/issues/61005) in GitLab 12.1.
-If you have set up Grafana, you can enable a link to access it easily from the sidebar:
+After setting up Grafana, you can enable a link to access it easily from the
+GitLab sidebar:
-1. Go to the **Admin Area > Settings > Metrics and profiling**.
+1. Navigate to the **{admin}** **Admin Area > Settings > Metrics and profiling**.
1. Expand **Metrics - Grafana**.
-1. Check the "Enable access to Grafana" checkbox.
-1. If Grafana is enabled through Omnibus GitLab and on the same server,
- leave **Grafana URL** unchanged. It should be `/-/grafana`.
-
- In any other case, enter the full URL of the Grafana instance.
+1. Check the **Enable access to Grafana** checkbox.
+1. Configure the **Grafana URL**:
+ - *If Grafana is enabled through Omnibus GitLab and on the same server,*
+ leave **Grafana URL** unchanged. It should be `/-/grafana`.
+ - *Otherwise,* enter the full URL of the Grafana instance.
1. Click **Save changes**.
-1. The new link will be available in the **Admin Area > Monitoring > Metrics Dashboard**.
+
+GitLab displays your link in the **{admin}** **Admin Area > Monitoring > Metrics Dashboard**.
## Security Update
-Users running GitLab version 12.0 or later should immediately upgrade to one of the following security releases due to a known vulnerability with the embedded Grafana dashboard:
+Users running GitLab version 12.0 or later should immediately upgrade to one of the
+following security releases due to a known vulnerability with the embedded Grafana dashboard:
- 12.0.6
- 12.1.6
-After upgrading, the Grafana dashboard will be disabled and the location of your existing Grafana data will be changed from `/var/opt/gitlab/grafana/data/` to `/var/opt/gitlab/grafana/data.bak.#{Date.today}/`.
+After upgrading, the Grafana dashboard is disabled, and the location of your
+existing Grafana data is changed from `/var/opt/gitlab/grafana/data/` to
+`/var/opt/gitlab/grafana/data.bak.#{Date.today}/`.
To prevent the data from being relocated, you can run the following command prior to upgrading:
@@ -100,19 +105,23 @@ sudo mv /var/opt/gitlab/grafana/data.bak.xxxx/ /var/opt/gitlab/grafana/data/
However, you should **not** reinstate your old data _except_ under one of the following conditions:
-1. If you are certain that you changed your default admin password when you enabled Grafana
-1. If you run GitLab in a private network, accessed only by trusted users, and your Grafana login page has not been exposed to the internet
+1. If you're certain that you changed your default admin password when you enabled Grafana.
+1. If you run GitLab in a private network, accessed only by trusted users, and your
+ Grafana login page has not been exposed to the internet.
-If you require access to your old Grafana data but do not meet one of these criteria, you may consider:
+If you require access to your old Grafana data but don't meet one of these criteria, you may consider:
1. Reinstating it temporarily.
1. [Exporting the dashboards](https://grafana.com/docs/grafana/latest/reference/export_import/#exporting-a-dashboard) you need.
1. Refreshing the data and [re-importing your dashboards](https://grafana.com/docs/grafana/latest/reference/export_import/#importing-a-dashboard).
DANGER: **Danger:**
-This poses a temporary vulnerability while your old Grafana data is in use and the decision to do so should be weighed carefully with your need to access existing data and dashboards.
+These actions pose a temporary vulnerability while your old Grafana data is in use.
+Deciding to take any of these actions should be weighed carefully with your need to access
+existing data and dashboards.
-For more information and further mitigation details, please refer to our [blog post on the security release](https://about.gitlab.com/releases/2019/08/12/critical-security-release-gitlab-12-dot-1-dot-6-released/).
+For more information and further mitigation details, please refer to our
+[blog post on the security release](https://about.gitlab.com/releases/2019/08/12/critical-security-release-gitlab-12-dot-1-dot-6-released/).
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index 32a241e032b..9cc874c883a 100644
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diff --git a/doc/administration/monitoring/performance/img/performance_bar_gitaly_threshold.png b/doc/administration/monitoring/performance/img/performance_bar_gitaly_threshold.png
index 4e42d904cdf..386558da813 100644
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index ecb2dffbf8d..f2df8c794db 100644
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index 74711387ffe..3872c8b41b2 100644
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index 210f80a713d..0340ca1b2f7 100644
--- a/doc/administration/monitoring/performance/img/performance_bar_rugged_calls.png
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diff --git a/doc/administration/monitoring/performance/performance_bar.md b/doc/administration/monitoring/performance/performance_bar.md
index c681dedbca8..8002a9ab296 100644
--- a/doc/administration/monitoring/performance/performance_bar.md
+++ b/doc/administration/monitoring/performance/performance_bar.md
@@ -6,71 +6,83 @@ info: To determine the technical writer assigned to the Stage/Group associated w
# Performance Bar
-A Performance Bar can be displayed, to dig into the performance of a page. When
-activated, it looks as follows:
+You can display the GitLab Performance Bar to see statistics for the performance
+of a page. When activated, it looks as follows:
![Performance Bar](img/performance_bar.png)
-It allows you to see (from left to right):
+From left to right, it displays:
-- the current host serving the page
-- time taken and number of DB queries; click through for details of these queries
+- **Current Host**: the current host serving the page.
+- **Database queries**: the time taken (in milliseconds) and the total number
+ of database queries, displayed in the format `00ms / 00pg`. Click to display
+ a modal window with more details:
![SQL profiling using the Performance Bar](img/performance_bar_sql_queries.png)
-- time taken and number of [Gitaly](../../gitaly/index.md) calls; click through for details of these calls
+- **Gitaly calls**: the time taken (in milliseconds) and the total number of
+ [Gitaly](../../gitaly/index.md) calls. Click to display a modal window with more
+ details:
![Gitaly profiling using the Performance Bar](img/performance_bar_gitaly_calls.png)
-- time taken and number of [Rugged](../../high_availability/nfs.md#improving-nfs-performance-with-gitlab) calls; click through for details of these calls
+- **Rugged calls**: the time taken (in milliseconds) and the total number of
+ [Rugged](../../high_availability/nfs.md#improving-nfs-performance-with-gitlab) calls.
+ Click to display a modal window with more details:
![Rugged profiling using the Performance Bar](img/performance_bar_rugged_calls.png)
-- time taken and number of Redis calls; click through for details of these calls
+- **Redis calls**: the time taken (in milliseconds) and the total number of
+ Redis calls. Click to display a modal window with more details:
![Redis profiling using the Performance Bar](img/performance_bar_redis_calls.png)
-- total load timings of the page; click through for details of these calls. Values in the following order:
- - Backend - Time that the actual base page took to load
- - [First Contentful Paint](hhttps://web.dev/first-contentful-paint/) - Time until something was visible to the user
- - [DomContentLoaded](https://developers.google.com/web/fundamentals/performance/critical-rendering-path/measure-crp) Event
- - Number of Requests that the page loaded
- ![Frontend requests using the Performance Bar](img/performance_bar_frontend.png)
-- a link to add a request's details to the performance bar; the request can be
- added by its full URL (authenticated as the current user), or by the value of
- its `X-Request-Id` header
-- a link to download the raw JSON used to generate the Performance Bar reports
-
-On the far right is a request selector that allows you to view the same metrics
-(excluding the page timing and line profiler) for any requests made while the
-page was open. Only the first two requests per unique URL are captured.
+- **Elasticsearch calls**: the time taken (in milliseconds) and the total number of
+ Elasticsearch calls. Click to display a modal window with more details.
+- **Load timings** of the page: if your browser supports load timings (Chromium
+ and Chrome) several values in milliseconds, separated by slashes.
+ Click to display a modal window with more details. The values, from left to right:
+ - **Backend**: time needed for the base page to load.
+ - [**First Contentful Paint**](https://web.dev/first-contentful-paint/):
+ Time until something was visible to the user.
+ - [**DomContentLoaded**](https://developers.google.com/web/fundamentals/performance/critical-rendering-path/measure-crp) Event.
+ - **Total number of requests** the page loaded:
+ ![Frontend requests using the Performance Bar](img/performance_bar_frontend.png)
+- **Trace**: If Jaeger is integrated, **Trace** links to a Jaeger tracing page
+ with the current request's `correlation_id` included.
+- **+**: A link to add a request's details to the performance bar. The request
+ can be added by its full URL (authenticated as the current user), or by the value of
+ its `X-Request-Id` header.
+- **Download**: a link to download the raw JSON used to generate the Performance Bar reports.
+- **Request Selector**: a select box displayed on the right-hand side of the
+ Performance Bar which enables you to view these metrics for any requests made while
+ the current page was open. Only the first two requests per unique URL are captured.
## Request warnings
-For requests exceeding predefined limits, a warning icon will be shown
-next to the failing metric, along with an explanation. In this example,
-the Gitaly call duration exceeded the threshold:
+Requests exceeding predefined limits display a warning **{warning}** icon and
+explanation next to the failing metric. In this example, the Gitaly call duration
+exceeded the threshold:
![Gitaly call duration exceeded threshold](img/performance_bar_gitaly_threshold.png)
-If any requests on the current page generated warnings, the icon will
-appear next to the request selector:
+If any requests on the current page generated warnings, the warning icon displays
+next to the **Request selector**:
![Request selector showing two requests with warnings](img/performance_bar_request_selector_warning.png)
-And requests with warnings are indicated in the request selector with a
-`(!)` after their path:
+Requests with warnings display `(!)` after their path in the **Request selector**:
![Request selector showing dropdown](img/performance_bar_request_selector_warning_expanded.png)
## Enable the Performance Bar via the Admin panel
-GitLab Performance Bar is disabled by default. To enable it for a given group,
-navigate to **Admin Area > Settings > Metrics and profiling**
-(`admin/application_settings/metrics_and_profiling`), and expand the section
-**Profiling - Performance bar**.
+The GitLab Performance Bar is disabled by default. To enable it for a given group:
-The only required setting you need to set is the full path of the group that
-will be allowed to display the Performance Bar.
-Make sure _Enable the Performance Bar_ is checked and hit
-**Save** to save the changes.
+1. Sign in as a user with Administrator [permissions](../../../user/permissions.md).
+1. In the menu bar, click the **{admin}** **Admin Area** icon.
+1. Navigate to **{settings}** **Settings > Metrics and profiling**
+ (`admin/application_settings/metrics_and_profiling`), and expand the section
+ **Profiling - Performance bar**.
+1. Click **Enable access to the Performance Bar**.
+1. In the **Allowed group** field, provide the full path of the group allowed
+ to access the GitLab Performance Bar.
+1. Click **Save changes**.
-Once the Performance Bar is enabled, you will need to press the [<kbd>p</kbd> +
-<kbd>b</kbd> keyboard shortcut](../../../user/shortcuts.md) to actually
-display it.
+## Keyboard shortcut for the Performance Bar
-You can toggle the Bar using the same shortcut.
-
-![GitLab Performance Bar Admin Settings](img/performance_bar_configuration_settings.png)
+After enabling the GitLab Performance Bar, press the [<kbd>p</kbd> +
+<kbd>b</kbd> keyboard shortcut](../../../user/shortcuts.md) to display it, and
+again to hide it.