[erlang-questions] Ref counted binary in ETS
Thu Oct 27 23:24:19 CEST 2016
Wow, 48-bytes is a huge overhead as N ~= 1000, and Every reader reads a
binary 10x times or so per second.
Can anyone please suggest a better strategy to efficiently share them with
a lesser overhead?
Le Thursday, October 27, 2016, Tony Rogvall <> a écrit :
> 1. A reference.
> It will however build a 6-word structure called ProcBin on the heap for
> every binary reference that you read.
> On a 64 bit machine that will lead to a 48 byte overhead. Nearly 10%.
> > On 27 okt 2016, at 20:47, Frank Muller <
> > Hi guys
> > Suppose an ETS table with only 1 writer and N readers
> > This table contains only large binaries (>64B) with the same size 512B
> > The single writer update these Bins once a while.
> > The N readers regularly read one of these Bins, but never change/update
> > Questions: what a reader gets when reading a Bin from this ETS table:
> > 1. a reference to that Bin
> > 2. or a full copy of that Bin
> > Hope someone can clarify this (with an example).
> > Thank you
> > Frank
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