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Date:      Sun, 13 Mar 2005 16:33:00 +0300
From:      Sergey Matveychuk <sem@FreeBSD.org>
To:        Peter Edwards <peadar.edwards@gmail.com>
Cc:        Mathieu Arnold <mat@mat.cc>
Subject:   Re: unionfs 5.4
Message-ID:  <4234410C.5080804@FreeBSD.org>
In-Reply-To: <34cb7c84050310091243cdc342@mail.gmail.com>
References:  <87is46kzk1.fsf@neva.vlink.ru> <41C26F23F7DF023CB3DF35C5@cc-171.int.t-online.fr> <20050305151903.GC26240@hub.freebsd.org>	 <87mzth18e2.fsf@neva.vlink.ru> <1DE178D508C1D70D1B5F9E87@cc-171.int.t-online.fr> <874qfpupk5.fsf@neva.vlink.ru> <DDE9BD25F957493B50EE49C5@cc-171.int.t-online.fr> <423027B1.8080503@FreeBSD.org> <34cb7c84050310091243cdc342@mail.gmail.com>

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Peter Edwards wrote:

> If someone experiencing these issues could try rebuilding after changing
> 
> #define NNULLNODECACHE 16
> to 
> #define NNULLNODECACHE 1024
> 
> in null_subr.c (line 50 in my version, 1.45)
> 
> And just see if it makes much of a difference. If so, it might be

It does not help. The problem with nullfs only in jail environment.
I've made a simple test: build devel/gettext port. Here is results:

just ffs: 1:47 min
nullfs:   1:43 min (oops!:)
nullfs in jail: 12:12 min

Almost ten times degradation.

-- 
Sem.



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