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synctl(1) -- Synapse server control interface
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## SYNOPSIS
Start, stop or restart synapse server.
`synctl` {start|stop|restart} [configfile] [-w|--worker=<WORKERCONFIG>] [-a|--all-processes=<WORKERCONFIGDIR>]
## DESCRIPTION
**synctl** can be used to start, stop or restart Synapse server. The
control operation can be done on all processes or a single worker
process.
## OPTIONS
* `action`:
The value of action should be one of `start`, `stop` or `restart`.
* `configfile`:
Optional path of the configuration file to use. Default value is
`homeserver.yaml`. The configuration file must exist for the
operation to succeed.
* `-w`, `--worker`:
Perform start, stop or restart operations on a single worker.
Incompatible with `-a`|`--all-processes`. Value passed must be a
valid worker's configuration file.
* `-a`, `--all-processes`:
Perform start, stop or restart operations on all the workers in
the given directory and the main synapse process. Incompatible
with `-w`|`--worker`. Value passed must be a directory containing
valid work configuration files. All files ending with `.yaml`
extension shall be considered as configuration files and all other
files in the directory are ignored.
## CONFIGURATION FILE
Configuration file may be generated as follows:
$ python -B -m synapse.app.homeserver -c config.yaml --generate-config --server-name=<server name>
## ENVIRONMENT
* `SYNAPSE_CACHE_FACTOR`:
Synapse's architecture is quite RAM hungry currently - a lot of
recent room data and metadata is deliberately cached in RAM in
order to speed up common requests. This will be improved in
future, but for now the easiest way to either reduce the RAM usage
(at the risk of slowing things down) is to set the
SYNAPSE_CACHE_FACTOR environment variable. Roughly speaking, a
SYNAPSE_CACHE_FACTOR of 1.0 will max out at around 3-4GB of
resident memory - this is what we currently run the matrix.org
on. The default setting is currently 0.1, which is probably around
a ~700MB footprint. You can dial it down further to 0.02 if
desired, which targets roughly ~512MB. Conversely you can dial it
up if you need performance for lots of users and have a box with a
lot of RAM.
## COPYRIGHT
This man page was written by Sunil Mohan Adapa <<sunil@medhas.org>> for
Debian GNU/Linux distribution.
## SEE ALSO
synapse_port_db(1), hash_password(1), register_new_matrix_user(1)
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