判断我的VPS是否需要升级(一般来说)

I would spin up a new VM and move to it as described at Move a Discourse site to another VPS with rsync. If you don’t mind a bunch of downtime and the possibility that it’ll wreck you system, you can try to do multiple dist-upgrades. If you do that, you should make a snapshot (which also incurs downtime) so that you can restore to it.

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