On 12/9/13 7:33 AM, Benedikt Grundmann wrote:
At Jane Street we have recently spend a lot of time trying to get a fast
gettimeofday. I saw lots of references in various postgres hacker threads
related to a lack of such a facility so ....
The culmination of those efforts can be read here:
https://github.com/janestreet/core/blob/master/lib/time_stamp_counter.mli
and
https://github.com/janestreet/core/blob/master/lib/time_stamp_counter.ml
it's all OCaml but the code is mostly imperative and very well documented. In
particular we made an effort to document our assumption. There are a few which
are ocaml specific. But a lot of the lessons we have learned here should be
applicable to postgres.
Looks interesting. I think this isn't nearly as big an issue in Postgres as it
used to be, but I think there's also things we've been avoiding because of the
overhead. IE: using IO response time to determine if something came from cache
or not.
--
Jim C. Nasby, Data Architect j...@nasby.net
512.569.9461 (cell) http://jim.nasby.net
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