Re: splitting up tables based on read/write frequency of columns

Hi

I'm pretty sure PostgreSQL can handle this.
But since you asked with a theoretic background,
it's probably worthwhile to look at column stores (like [1]).

-S.

[*] http://citusdata.github.io/cstore_fdw/

2015-01-19 22:47 GMT+01:00 Jonathan Vanasco <postgres(at)2xlp(dot)com>:
> This is really a theoretical/anecdotal question, as I'm not at a scale yet where this would measurable. I want to investigate while this is fresh in my mind...
>
> I recall reading that unless a row has columns that are TOASTed, an `UPDATE` is essentially an `INSERT + DELETE`, with the previous row marked for vacuuming.
>
> A few of my tables have the following characteristics:
> - The Primary Key has many other tables/columns that FKEY onto it.
> - Many columns (30+) of small data size
> - Most columns (90%) are 1 WRITE(UPDATE) for 1000 READS
> - Some columns (10%) do a bit of internal bookkeeping and are 1 WRITE(UPDATE) for 50 READS
>
> Has anyone done testing/benchmarking on potential efficiency/savings by consolidating the frequent UPDATE columns into their own table?
>
>
>
>
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