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clarify direction of information in idle-culler

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JupyterHub does not poll servers, servers post activity
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2022-05-05 14:42:57 +02:00
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docs/topic/idle-culler.rst
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@@ -8,9 +8,10 @@ The idle culler automatically shuts down user notebook servers when they have
not been used for a certain time period, in order to reduce the total resource
usage on your JupyterHub.
JupyterHub pings the user's notebook server at certain time intervals. If no response
is received from the server during this checks and the timeout expires, the server is
considered to be *inactive (idle)* and will be culled.
The notebook server monitors activity internally
and notifies JupyterHub of recent activity at certain time intervals (the activity interval).
If JupyterHub has not been notified of any activity after a certain period (the idle timeout),
the server is considered to be *inactive (idle)* and will be culled (shutdown).
The `idle culler <https://github.com/jupyterhub/jupyterhub-idle-culler>`_ is a JupyterHub service that is installed and enabled by default in TLJH.
It can be configured using tljh-config. For advanced use-cases, like purging old user data,