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Enable complexity checking in complexity checking docs example (#11998)

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Andrew Morgan 2022-03-02 16:11:16 +00:00 committed by GitHub
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Fix complexity checking config example in [Resource Constrained Devices](https://matrix-org.github.io/synapse/v1.54/other/running_synapse_on_single_board_computers.html) docs page.

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docs/other/running_synapse_on_single_board_computers.md
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@ -31,28 +31,29 @@ Anything that requires modifying the device list [#7721](https://github.com/matr
Put the below in a new file at /etc/matrix-synapse/conf.d/sbc.yaml to override the defaults in homeserver.yaml.
```
# Set to false to disable presence tracking on this homeserver.
# Disable presence tracking, which is currently fairly resource intensive
# More info: https://github.com/matrix-org/synapse/issues/9478
use_presence: false
# When this is enabled, the room "complexity" will be checked before a user
# joins a new remote room. If it is above the complexity limit, the server will
# disallow joining, or will instantly leave.
# Set a small complexity limit, preventing users from joining large rooms
# which may be resource-intensive to remain a part of.
#
# Note that this will not prevent users from joining smaller rooms that
# eventually become complex.
limit_remote_rooms:
# Uncomment to enable room complexity checking.
#enabled: true
enabled: true
complexity: 3.0
# Database configuration
database:
# Use postgres for the best performance
name: psycopg2
args:
user: matrix-synapse
# Generate a long, secure one with a password manager
# Generate a long, secure password using a password manager
password: hunter2
database: matrix-synapse
host: localhost
cp_min: 5
cp_max: 10
```
Currently the complexity is measured by [current_state_events / 500](https://github.com/matrix-org/synapse/blob/v1.20.1/synapse/storage/databases/main/events_worker.py#L986). You can find join times and your most complex rooms like this: