[outofmyshed]

Anyone going “just use low TTLs all the time” doesn’t have a lot of traffic to deal with.

I have a commit of ~15bn queries/month with my DNS provider ATM, and if just one busy record has its TTL set erroneously low, it can cost an extra few thousand $ a month in overages. It’s not a great conversation to have with the CFO when that happens. Caching matters.

[mrb]

If your 15B queries are generated by 15B website visits monthly, your web properties should be generating tens of millions of dollars in monthly income. So a few thousand dollars is nothing.

Unless your traffic is non-revenue generating or somehow poorly monetizable...

[withinboredom]

> So a few thousand dollars is nothing.

In any business doing proper budgeting and trying to make a profit, a few thousands in UNEXPECTED costs, is huge. It can be the difference between your department having the money for new equipment, or begging for a budget increase because of unexpected costs to get new equipment.