typo in the numbers ? I can get your mongoDB number but not pg: >>> ... | Hacker News

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zzzeek on April 13, 2012 | parent | context | favorite | on: A Year with MongoDB

typo in the numbers ? I can get your mongoDB number but not pg:

    >>> seconds_per_month = 60 * 60 * 24 * 30
    >>> ops_per_month_pg = 1000 * seconds_per_month
    >>> ops_per_month_mg = 200 * seconds_per_month
    >>> 330.0 / ops_per_month_pg * 100
    1.2731481481481482e-05
    >>> 330.0 / ops_per_month_mg * 100
    6.36574074074074e-05

nivertech on April 14, 2012 | [–]

You could have skipped all the calculations and just say, that 1000/200=5, I.e PostgreSQL 5 times more cost effective than MongoDB.

mitchellh on April 13, 2012 | [–]

You're absolutely right. Decimal points are hard. Fixed my comment (and noted it).

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