Bug#856698: (no subject)

[Jacob Hoffman-Andrews]

Also, how many files and directories do you have under
/etc/letsencrypt/archive?

find /etc/letsencrypt/archive | wc -l
ls /etc/letsencrypt/archive | wc -l

There is a known issue with Certbot performing poorly when many old
certificates are present.

Bug#856698: (no subject)

[Jacob Hoffman-Andrews]

What is the command that is running when certbot consumes a lot of memory?

Can you provide the contents of /etc/cron.d/certbot, and
/var/log/letsencrypt.log from a run where certbot consumed a lot of memory?

If you're using the Nginx or Apache configurators, can you provide your
Nginx or Apache configs?