hi guys, yes, dbconfig-common creates a backup of the database before upgrading it. i'd swear at some point it was on my list to make it optional or configurable, but i don't think that's been done. the tail of the culprit is in /usr/share/dbconfig-common/dpkg/postinst (search for "backup before we upgrade"), and can be dug up from that point.
i'm open to suggestions for how to make this better, ex: debconf questions,
configuration options, implementation details, etc. also, if you have a
less-memory-consuming dump command than what is being currently used, please
do suggest it.
sean
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