Originally from the User Slack
@Piette_Dylan: Hello everyone,
Is it possible to update tombstone_warn_threshold by just updating its value in the system.config table via a CQL query ?
If yes and if I want all my nodes to share the same value do I need to execute the query on every node of the cluster or just one ?
https://opensource.docs.scylladb.com/stable/reference/configuration-parameters.html#tombstone-settings
Configuration Parameters | ScyllaDB Docs
@Felipe_Cardeneti_Mendes: no, it is not a live-updateable value - maybe it should be. cc @Botond_Dénes
From an operational perspective - for liveupdate config changes you’d be better off updating scylla.yaml and SIGHUP the scylla pid on all nodes.
@Piette_Dylan: Thanks for you answer @Felipe_Cardeneti_Mendes
So I don’t need to restart Scylla with that method then ?
And sorry for my (maybe dumb) question but how do you SIGHUP ?
@Botond_Dénes: You do have to do a rolling restart, because this config item is not live-update.
kill -SIGHUP $(pidof scylla)
@Piette_Dylan: But the method from Felipe works right ?
@Botond_Dénes: SIGHUP only works with live-update config items. For non live-update, you have to update every scylla.yaml then do rolling restart
@Piette_Dylan: Ha ok, thanks a lot !