There are total of 12,545 posts on my website. 10,464 of the post only generate 8,656 pageview / month and 340 pageview / day.

While the other 2,091 posts generate up to 1 millions page view per month and 35k per day.

Should I keep those 10K useless posts or deleted (410) it. Will it affect my overall DA or hurt my ranking at all? Those 10K contents are no longer informative (OUTDATED) even if I try to update the content it is still useless.