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85 lines
4.6 KiB
Markdown
85 lines
4.6 KiB
Markdown
# Monthly Active Users
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Synapse can be configured to record the number of monthly active users (also referred to as MAU) on a given homeserver.
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For clarity's sake, MAU only tracks local users.
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Please note that the metrics recorded by the [Homeserver Usage Stats](../../usage/administration/monitoring/reporting_homeserver_usage_statistics.md)
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are calculated differently. The `monthly_active_users` from the usage stats does not take into account any
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of the rules below, and counts any users who have made a request to the homeserver in the last 30 days.
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See the [configuration manual](../../usage/configuration/config_documentation.md#limit_usage_by_mau) for details on how to configure MAU.
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## Calculating active users
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Individual user activity is measured in active days. If a user performs an action, the exact time of that action is then recorded. When
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calculating the MAU figure, any users with a recorded action in the last 30 days are considered part of the cohort. Days are measured
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as a rolling window from the current system time to 30 days ago.
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So for example, if Synapse were to calculate the active users on the 15th July at 13:25, it would include any activity from 15th June 13:25 onwards.
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A user is **never** considered active if they are either:
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- Part of the trial day cohort (described below)
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- Owned by an application service.
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- Note: This **only** covers users that are part of an application service `namespaces.users` registration. The namespace
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must also be marked as `exclusive`.
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Otherwise, any request to Synapse will mark the user as active. Please note that registration will not mark a user as active *unless*
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they register with a 3pid that is included in the config field `mau_limits_reserved_threepids`.
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The Prometheus metric for MAU is refreshed every 5 minutes.
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Once an hour, Synapse checks to see if any users are inactive (with only activity timestamps later than 30 days). These users
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are removed from the active users cohort. If they then become active, they are immediately restored to the cohort.
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It is important to note that **deactivated** users are not immediately removed from the pool of active users, but as these users won't
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perform actions they will eventually be removed from the cohort.
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### Trial days
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If the config option `mau_trial_days` is set, a user must have been active this many days **after** registration to be active. A user is in the
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trial period if their registration timestamp (also known as the `creation_ts`) is less than `mau_trial_days` old.
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As an example, if `mau_trial_days` is set to `3` and a user is active **after** 3 days (72 hours from registration time) then they will be counted as active.
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The `mau_appservice_trial_days` config further extends this rule by applying different durations depending on the `appservice_id` of the user.
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Users registered by an application service will be recorded with an `appservice_id` matching the `id` key in the registration file for that service.
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## Limiting usage of the homeserver when the maximum MAU is reached
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If both config options `limit_usage_by_mau` and `max_mau_value` is set, and the current MAU value exceeds the maximum value, the
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homeserver will begin to block some actions.
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Individual users matching **any** of the below criteria never have their actions blocked:
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- Considered part of the cohort of MAU users.
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- Considered part of the trial period.
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- Registered as a `support` user.
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- Application service users if `track_appservice_user_ips` is NOT set.
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Please not that server admins are **not** exempt from blocking.
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The following actions are blocked when the MAU limit is exceeded:
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- Logging in
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- Sending events
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- Creating rooms
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- Syncing
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Registration is also blocked for all new signups *unless* the user is registering with a threepid included in the `mau_limits_reserved_threepids`
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config value.
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When a request is blocked, the response will have the `errcode` `M_RESOURCE_LIMIT_EXCEEDED`.
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## Metrics
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Synapse records several different prometheus metrics for MAU.
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`synapse_admin_mau_current` records the current MAU figure for native (non-application-service) users.
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`synapse_admin_mau_max` records the maximum MAU as dictated by the `max_mau_value` config value.
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`synapse_admin_mau_current_mau_by_service` records the current MAU including application service users. The label `app_service` can be used
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to filter by a specific service ID. This *also* includes non-application-service users under `app_service=native` .
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`synapse_admin_mau_registered_reserved_users` records the number of users specified in `mau_limits_reserved_threepids` which have
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registered accounts on the homeserver.
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