[racket] racket http server, major GC: -216 bytes collected

FWIW, I have no clue.

Jay

2011/1/8 Stefan Schmiedl <s at xss.de>:
> Hi,
>
> today I was dabbling around with my servlet study, and switched
> on debugging output for racket.
>
>  stefan at g128 racket % racket -W debug -u vacation-loop.rkt
>  GC [minor] at 1484840 bytes; 644984 collected in 1 msec
>  GC [minor] at 2219568 bytes; 650160 collected in 1 msec
>  GC [minor] at 4256376 bytes; 1282232 collected in 4 msec
>  GC [minor] at 5544024 bytes; 1268200 collected in 4 msec
>  GC [minor] at 8433888 bytes; 2004064 collected in 7 msec
>  GC [minor] at 11301992 bytes; 2566680 collected in 9 msec
>  GC [minor] at 14976456 bytes; 3075320 collected in 12 msec
>  GC [minor] at 19656896 bytes; 3690896 collected in 12 msec
>  GC [minor] at 26845544 bytes; 4950472 collected in 26 msec
>  GC [minor] at 33867744 bytes; 6128456 collected in 21 msec
>  GC [minor] at 42413848 bytes; 7560344 collected in 26 msec
>  GC [minor] at 54035040 bytes; 8792384 collected in 40 msec
>  GC [major] at 69836240 bytes; 15243240 collected in 112 msec
>  GC [minor] at 84420144 bytes; 18721472 collected in 56 msec
>  GC [minor] at 99513800 bytes; 21027008 collected in 75 msec
>  debug: I'm here
>  GC [minor] at 113078792 bytes; 24509152 collected in 71 msec
>  debug: now I'm there
>
> At this point I went away for a few hours and this is what I found
> when I came back:
>
>  GC [major] at 89671472 bytes; 40452096 collected in 103 msec
>  GC [major] at 49219376 bytes; 0 collected in 91 msec
>  GC [major] at 49219376 bytes; 38520 collected in 88 msec
>  GC [major] at 49180856 bytes; 0 collected in 88 msec
>  GC [major] at 49180856 bytes; -2768 collected in 89 msec
>  GC [major] at 49183624 bytes; 0 collected in 88 msec
>  GC [major] at 49183624 bytes; -5768 collected in 87 msec
>  GC [major] at 49189392 bytes; 0 collected in 89 msec
>  GC [major] at 49189392 bytes; -1968 collected in 89 msec
>  GC [major] at 49191360 bytes; 0 collected in 88 msec
>  GC [major] at 49191360 bytes; -384 collected in 88 msec
>  GC [major] at 49191744 bytes; 0 collected in 89 msec
>  GC [major] at 49191744 bytes; -216 collected in 88 msec
>  GC [major] at 49191960 bytes; 0 collected in 89 msec
>  GC [major] at 49191960 bytes; -216 collected in 88 msec
>  GC [major] at 49192176 bytes; 0 collected in 88 msec
>  GC [major] at 49192176 bytes; -384 collected in 88 msec
>  GC [major] at 49192560 bytes; 0 collected in 88 msec
>  GC [major] at 49192560 bytes; -216 collected in 88 msec
>  GC [major] at 49192776 bytes; 0 collected in 88 msec
>  GC [major] at 49192776 bytes; -216 collected in 89 msec
>  GC [major] at 49192992 bytes; 0 collected in 87 msec
>  GC [major] at 49192992 bytes; -384 collected in 88 msec
>  GC [major] at 49193376 bytes; 0 collected in 88 msec
>  GC [major] at 49193376 bytes; -216 collected in 88 msec
>  GC [major] at 49193592 bytes; 0 collected in 89 msec
>  GC [major] at 49193592 bytes; -216 collected in 88 msec
>  GC [major] at 49193808 bytes; 0 collected in 88 msec
>  GC [major] at 49193808 bytes; -216 collected in 88 msec
>  GC [major] at 49194024 bytes; 0 collected in 89 msec
>  GC [major] at 49194024 bytes; -384 collected in 88 msec
>  GC [major] at 49194408 bytes; 0 collected in 89 msec
>  GC [major] at 49194408 bytes; -216 collected in 88 msec
>  GC [major] at 49194624 bytes; 0 collected in 89 msec
>  GC [major] at 49194624 bytes; -216 collected in 88 msec
>  GC [major] at 49194840 bytes; 0 collected in 88 msec
>  GC [major] at 49194840 bytes; -384 collected in 91 msec
>  GC [major] at 49195224 bytes; 0 collected in 92 msec
>  GC [major] at 49195224 bytes; -216 collected in 88 msec
>  GC [major] at 49195440 bytes; 0 collected in 89 msec
>
> During this time no requests should have been reaching this
> server (running on localhost on a box behind a firewall).
>
> I don't know at what points in time these major GCs occured,
> but I am a bit worried about those negative numbers that are
> "collected" while the server is sitting idle.
>
> Does anybody have an idea where this is coming from? Or
> how I could go about locating the source of this misbehavior?
> Or is it just much ado about nothing?
>
> Curious,
> s.
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-- 
Jay McCarthy <jay at cs.byu.edu>
Assistant Professor / Brigham Young University
http://faculty.cs.byu.edu/~jay

"The glory of God is Intelligence" - D&C 93