[Haskell] Re[2]: [Haskell-cafe] Is Haskell a Good Choice for Web Applications? (ANN: Vocabulink)

[Simon Marlow]

On 07/05/2009 15:17, Bulat Ziganshin wrote:
> Hello Simon,
>
> Thursday, May 7, 2009, 5:45:53 PM, you wrote:
>
>> out of date and say 256k, I've just fixed that).  The old generation is
>> allowed to grow to 2x its previous size by default before being
>> collected.
>
> you are right. i just checked old logs - seems that previously i just
> misinterpreted them
>
>>> we need  authoritative description that pays attention to all
>>> GC-related RTS  switches
>
>> I'm happy to add more text here, what else would you like to see?
>
> how about text that describes GC scenario like you was wrote in this
> letter? plus, description of RTS +S report format - it may be added to
> this scenario, i.e. "after this major GC, the following line will be
> printed to +S report: ..."
>
> for example, i still doesn't understand why
>
> old_live + alloc - collect != new_live

The output has changed: it now counts copied data, since as you say 
"collect" is a function of the other columns.

> in the report below (i extracted two sequential lines):
>
>      Alloc    Collect    Live    GC    GC     TOT     TOT  Page Flts
>      bytes     bytes     bytes  user  elap    user    elap
>     265016    303104    840008  0.00  0.00    0.11    0.17    0    0  (Gen:  0)
>     265612    266240    904196  0.00  0.00    0.11    0.17    0    0  (Gen:  0)
>
>
> and completely separate topic - +RTS -s report description also
> doesn't exist

Scroll down in that section I linked to before:

http://www.haskell.org/ghc/docs/latest/html/users_guide/runtime-control.html#rts-options-gc

Cheers,
	Simon